what volume of a 0.2089 m ki solution contains enough ki to react exactly with the cuno32

Answers

Answer 1

The given solution is a 0.2089 M KI solution and it is required to find the volume of this solution that contains enough KI to react exactly with Cu(NO3)2.

In order to solve the problem, we can use the following balanced chemical equation:2KI + Cu(NO3)2 → CuI2 + 2KNO3From the equation, we can see that 2 moles of KI react with 1 mole of Cu(NO3)2. Therefore, the number of moles of Cu(NO3)2 required will be equal to half the number of moles of KI. We can calculate the number of moles of KI required by using the following formula:moles = Molarity × Volume (in liters)⇒ Volume (in liters) = moles / Molarity Given that the molarity of KI solution is 0.2089 M,

we can find the number of moles of KI required using the balanced chemical equation and stoichiometry:1 mole of Cu(NO3)2 reacts with 2 moles of KI0.154 moles of Cu(NO3)2 will react with = 0.154 × 2 = 0.308 moles of KI Volume of KI solution required = moles / Molarity = 0.308 / 0.2089 = 1.475 liters Therefore, the volume of the 0.2089 M KI solution that contains enough KI to react exactly with Cu(NO3)2 is 1.475 liters.

To know more about chemical equation refer to:

https://brainly.com/question/29886207

#SPJ11


Related Questions

The rate constant of a certain reaction is known to obey the Arrhenius equation, and to have an activation energy Ea​=37.0 kJm mol. If the rate constant of this reaction is 1.5×103M−1+5−1 at 59.0∘C, what will the rate constant be at 144.0∘C ? Round your answer to 2 significant digits.

Answers

The rate constant at 144.0°C is approximately 2.2 × 10^3 M^(-1)s^(-1).

What is the rate constant at 144.0°C for a reaction that follows the Arrhenius equation, given an activation energy of 37.0 kJ/mol and a rate constant of 1.5 × 10^3 M^(-1)s^(-1) at 59.0°C? (Round the answer to 2 significant digits.)

To calculate the rate constant at 144.0°C using the Arrhenius equation, we can use the following formula:

k2 = k1 * exp((Ea / R) * ((1 / T1) - (1 / T2)))

Where:

k1 = rate constant at the initial temperature (59.0°C)

k2 = rate constant at the final temperature (144.0°C)

Ea = activation energy (37.0 kJ/mol)

R = gas constant (8.314 J/(mol·K))

T1 = initial temperature in Kelvin (59.0 + 273.15)

T2 = final temperature in Kelvin (144.0 + 273.15)

Plugging in the values into the formula:

k2 = (1.5 × 10^3 M^(-1)s^(-1)) * exp((37.0 × 10^3 J/mol) / (8.314 J/(mol·K)) * ((1 / (59.0 + 273.15)) - (1 / (144.0 + 273.15))))

k2 = (1.5 × 10^3) * exp(14.784 * (0.003165 - 0.001512))

Finally, rounding the answer to two significant digits:

k2 ≈ 2.2 × 10^3 M^(-1)s^(-1)

Learn more about rate constant

brainly.com/question/20305922

#SPJ11

Draw the structure with a positively charged carbon.

Answers

A positively charged carbon is referred to as a carbocation. It is a carbon atom that has lost an electron and therefore carries a positive charge.

The carbon atom forms three bonds instead of the usual four, leaving an empty p-orbital. The structure of a carbocation can vary depending on the specific substituents attached to the carbon atom. Here is a general representation of a carbocation:

R1 - C+

|

R2 - R3

In this structure, R1, R2, and R3 represent different substituents or groups attached to the carbon atom. The positive charge is indicated by the "+" symbol next to the carbon atom.

Learn more about carbocation, here:

https://brainly.com/question/31538109

#SPJ4

if a reaction mixture initially contains 0.150 mso2cl2 , what is the equilibrium concentration of cl2 at 227 ∘c ?

Answers

Therefore, the equilibrium concentration of Cl2 at 227 ∘C is 0.0458 M.

The equilibrium concentration of Cl2 at 227 ∘C can be found out by following the steps mentioned below:

Step 1

Balanced chemical equation is given below:

2 SO2Cl2(g) ⇌ 2 SO2(g) + Cl2(g)

Step 2

Initial Concentration of SO2Cl2 = 0.150 M

There is no SO2 or Cl2 initially so the initial concentration of both gases will be zero (0).

So, initial concentration of SO2 = 0.0 M

Initial Concentration of Cl2 = 0.0 M

Step 3

Equilibrium Concentration of SO2Cl2 = (0.150-x) M (Because, x mol of SO2Cl2 reacts to form x mol of Cl2)

Equilibrium Concentration of SO2 = (x) M (Because, x mol of SO2Cl2 reacts to form x mol of SO2)

Equilibrium Concentration of Cl2 = (x) M (Because, x mol of SO2Cl2 reacts to form x mol of Cl2)

Step 4The value of the equilibrium constant (Kc) for the reaction SO2Cl2(g) ⇌ SO2(g) + Cl2(g) at 227 ∘C is 1.56 atmpressure.

The equation for Kc is given below:

Kc = ([SO2][Cl2]) / [SO2Cl2]Kc = ([x][x]) / [0.150-x]Kc = (x²) / (0.150-x)So, (x²) / (0.150-x) = 1.56

Solving the above equation, we get the value of x = 0.0458 M

Step 5Now, put the value of x in the above concentration formula.

Equilibrium Concentration of Cl2 = 0.0458 M

Therefore, the equilibrium concentration of Cl2 at 227 ∘C is 0.0458 M.

To know more about  equilibrium concentration visit:

https://brainly.com/question/16645766

#SPJ11

draw and name the organic product of the given reaction. a benzene ring. hno3−→−−−−h2so4

Answers

When benzene is reacted with a mixture of nitric and sulfuric acid, nitration occurs. the organic product of the given reaction is Nitrobenzene.

The HNO3 protonates the NO2, which then becomes an electrophile and attacks the ring by replacing one of the hydrogen atoms. Nitration is the act or process of adding one or more nitro groups (-NO2) to a molecule. In the presence of sulfuric acid, nitric acid is used to nitrate aromatic compounds such as benzene. Benzene + HNO3 + H2SO4 → Nitrobenzene (Product) + H2OBy nitration of benzene with a mixture of HNO3 and H2SO4, Nitrobenzene is formed.

HNO3 reacts with the benzene ring and produces nitrobenzene. In general, the Nitration reaction is given as: Benzene + HNO3 + H2SO4 → Nitrobenzene (Product) + H2OWhen benzene is reacted with a mixture of nitric and sulfuric acid, nitration occurs. The HNO3 protonates the NO2, which then becomes an electrophile and attacks the ring by replacing one of the hydrogen atoms.

To know more about benzene visit:

https://brainly.com/question/31837011

#SPJ11

Suppose the galvanic cell sketched below is powered by the following reaction: Fe(s)+NiCl(aq) FeCl(aq)+Ni(s) E1 E2 Si S1 S2 Write a balanced equation for the half-reaction that happens at the cathode of this cell Write a balanced equation for the half-reaction that happens at the anode of this cell. of what substance is El made? OD 6 х Х $ $ ? of what substance is Ez made? What are the chemical species in solution SI? E What are the chemical species in solution 52?

Answers

The given equation is a reduction reaction, and it takes place at the cathode during the oxidation-reduction reaction. Half-reaction for FeCl2(aq) reduction reaction:

Fe2+ (aq) + 2e- → Fe (s)

The given oxidation reaction takes place at the anode in the galvanic cell is:

Ni (s) → Ni2+ (aq) + 2e-

FeCl2 and NiCl2 are the chemical species in solution SI and S2

The given equation is a reduction reaction, and it takes place at the cathode during the oxidation-reduction reaction. Half-reaction for FeCl2(aq) reduction reaction:

Fe2+ (aq) + 2e- → Fe (s)

Here, Fe2+ undergoes a reduction reaction and gains electrons to form Fe(s).

The given oxidation reaction takes place at the anode in the galvanic cell is:

Ni (s) → Ni2+ (aq) + 2e-

Therefore, the balanced equation for the anode half-reaction can be written as:Ni(s) → Ni2+(aq) + 2e-

The value of E1 is given, which means that it is the standard reduction potential of Fe2+.

The value of E2 is given, which means that it is the standard reduction potential of Ni2+.

FeCl2 and NiCl2 are the chemical species in solution SI.

FeCl2 and NiCl2 are the chemical species in solution S2.

To know more about chemical species visit:

https://brainly.com/question/32103069

#SPJ11

Identify a substance which can reduce Br (1) to Br- (aq) but cannot reduce 1,(s) to I-(aq). O Ag(s) O Cl(aq) O Pb(s) O 92-(aq)

Answers

Cl(aq) can reduce Br(1) to Br-(aq) but cannot reduce 1(s) to I-(aq). Therefore, Cl(aq) is the substance that can reduce Br(1) to Br-(aq) but cannot reduce I(s) to I-(aq).

An oxidation-reduction reaction, also known as a redox reaction, is a type of chemical reaction in which one or more electrons are transferred from one molecule or atom to another. Oxidation is a process in which an atom or molecule loses one or more electrons, whereas reduction is a process in which an atom or molecule gains one or more electrons.In the given options, Cl(aq) is the substance that can reduce Br(1) to Br-(aq) but cannot reduce I(s) to I-(aq). Chlorine gas (Cl2) is commonly utilized to treat water supplies to eliminate bacteria and other contaminants.

It is a powerful oxidizing agent that can react with water to form hypochlorite ions (ClO-), chlorite ions (ClO2-), chlorate ions (ClO3-), and perchlorate ions (ClO4-) depending on the conditions. Chlorine gas can easily oxidize Br- to Br2, which is a powerful oxidant in its own right, in the presence of water. However, it is unable to oxidize I- to I2, which is why Cl(aq) can reduce Br(1) to Br-(aq) but cannot reduce I(s) to I-(aq).

To know more about substance visit:

https://brainly.com/question/3094878

#SPJ11

Given the reaction: Cu(s) + 2Ag+(aq) → Cu2+(aq) + 2Ag(s)
Which statement correctly indicates the change that occurs?


1. One mole of Cu(s) loses a total of 2 moles of electrons.

2. One mole of Cu(s) gains a total of 1 mole of electrons.

3. Two moles of Ag+(aq) loses a total of 2 moles of electrons.

4. Two moles of Ag+(aq) gains a total of 1 mole of electrons.

Answers

Answer: one mole of cu(s) loses total of 2 moles of electrons

Explanation:

Complete and balance the following redox reaction under acidic conditions. When properly balanced using the smallest whole number coefficients, the coefficient of S is H2S (g) + NO3-(aq) -> S (s) + NO(g)

Answers

The balanced redox reaction is as follows:H2S(g) + NO3-(aq) → S(s) + NO(g)Step-by-step solution:Redox reactions are those reactions that involve both oxidation and reduction simultaneously.

Such reactions are balanced using the half-reaction method. Let's balance the given redox reaction using the half-reaction method:Half-reaction of oxidation:H2S → SIn this reaction, hydrogen is oxidized to form Sulfur. The oxidation state of hydrogen changes from +1 to 0 and the oxidation state of Sulfur changes from -2 to 0. So, two electrons must be added to the left side of the equation.H2S → S + 2e- .... (1)Half-reaction of reduction:NO3- → NOIn this reaction, nitrogen is reduced to form nitric oxide.

The oxidation state of Nitrogen changes from +5 to +2 and the oxidation state of oxygen changes from -2 to 0. So, 3 electrons must be added to the right side of the equation.NO3- + 3e- → NO ..... (2)After balancing the two half-reactions, they should be added to obtain the complete balanced equation.(i) Multiply equation (1) by 2 to balance electrons.2H2S → 2S + 4e- .... (3)(ii) Add equation (3) and equation (2) to obtain the complete balanced equation.2H2S + NO3- + 3H+ → 2S + NO + 4H2O .... (4)Thus, the balanced redox reaction is H2S (g) + NO3-(aq) → S (s) + NO(g) with the smallest whole number coefficients and the coefficient of S is 1.

To know more about reaction visit:

https://brainly.com/question/30464598

#SPJ11

When a 12.8 g sample of NaOH(s) dissolves in 361.0 mL water in a coffee cup calorimeter, the temperature of the water changes from 21.6°C to 30.7°C. NaOH(s) + Na+ (aq) + OH- (aq) Assuming that the specific heat capacity of the solution is the same as for water (4.184 J/g. °C) and the density of the solution is 1.032 g/mL, calculate the following. (
a) the heat transfer from system to surroundings (in J) b) AH for the reaction (in kJ)

Answers

a) The heat transfer from the system to surroundings is 18.27 kJ

b) The enthalpy change of the reaction is +57.1 kJ/mol.

A solid sample of NaOH weighing 12.8 g was dissolved in 361.0 mL of water within a coffee cup calorimeter, resulting in a temperature rise of the water from 21.6°C to 30.7°C.

NaOH(s) + Na+ (aq) + OH- (aq)

Assuming that the specific heat capacity of the solution is the same as for water (4.184 J/g. °C) and the density of the solution is 1.032 g/mL, the heat transfer from the system to surroundings and the enthalpy change of the reaction (ΔHrxn) can be calculated.

a) The heat transfer (q) from the system to surroundings can be calculated using the equation:

q = m × c × ΔT

where m is the mass of the solution, c is the specific heat capacity, and ΔT is the temperature change.Using the given values, we can write:

q = (12.8 g + 361.0 g) × 4.184 J/g. °C × (30.7°C - 21.6°C)q = 18268.3 J ≈ 18.27 kJ

Therefore, the heat transfer from the system to surroundings is 18.27 kJ.

b) The enthalpy change of the reaction (ΔHrxn) can be calculated using the equation:

ΔHrxn = -q / n

where n is the number of moles of the substance that undergoes the reaction.In this case, 12.8 g of NaOH(s) dissolves in water. Considering that the molar mass of NaOH is 40 g/mol, we can determine the quantity of moles present in NaOH.

n = 12.8 g / 40 g/mol = 0.32 mol

Using the heat transfer value calculated above, we can write:

ΔHrxn = -(-18.27 kJ) / 0.32 mol

ΔHrxn = +57.1 kJ/mol

Therefore, the enthalpy change of the reaction is +57.1 kJ/mol.

Learn more about enthalpy change at: https://brainly.com/question/16387742

#SPJ11

explain what will happen to the ksp if not all the salt dissolves in the solution preparation.

Answers

The Ksp, or solubility product constant, is defined as the product of the concentrations of the ions of a sparingly soluble salt raised to the power of their stoichiometric coefficients. If not all of the salt dissolves during solution preparation, the Ksp will be affected.

The solubility product constant (Ksp) is a constant that quantifies the solubility of an ionic compound. The main answer to the question is that the Ksp will remain the same, regardless of the amount of salt that dissolves in the solution preparation.  the concentration of the ions will be different, depending on how much of the salt dissolved. The long answer is that the Ksp formula, which is given as [Aⁿ⁺]m[Bⁿ⁻]n, assumes that all of the salt is dissolved, or at least has the potential to dissolve in the solution. The solubility of the salt is directly proportional to the concentration of the ions in the solution.

Therefore, if not all of the salt dissolves in the solution preparation, the concentration of the ions will be lower than the expected value based on the Ksp formula. that the Ksp is a constant that remains unchanged, regardless of whether all of the salt dissolves in the solution preparation or not. The reason is that the Ksp is a property of the salt and is related to its solubility, not its dissolution rate. if the solubility is affected, then the concentration of the ions in the solution will also be affected. Therefore, the Ksp formula may need to be modified based on the actual concentration of the ions in the solution.

To know more about solution  Visit;

https://brainly.com/question/14985293

#SPJ11

Of the following substances, only __________ has London dispersion forces as its only intermolecular force.
a. CH3OH b. NH3 c. H2S d. Kr e. HCl

Answers

Of the following substances, only  Kr has London dispersion forces as its only intermolecular force. The correct answer is option (D) Kr.

The weakest type of intermolecular force between nonpolar molecules and noble gases (Ar, He, Kr, Xe) is the London dispersion force. The movement of electrons in one molecule's electron cloud causes a similar movement of electrons in another molecule, resulting in these brief, weak attractive forces. The electrons form temporary dipoles as a result of random movement in the electron cloud, which can be referred to as "dispersing" throughout the cloud.

The properties of noble gases are determined by London dispersion forces in the absence of any other intermolecular force. At room temperature, for instance, the gases helium, neon, argon, krypton, and xenon are all gases.

To know more about London dispersion forces:

https://brainly.com/question/30763886

#SPJ11

determine the ph of a solution that is 0.15 m hclo2 (ka= 1.1 × 10-2) and 0.15 m hclo (ka= 2.9 ×10-8).

Answers

The pH of a solution that is 0.15 M HClO2 (Ka= 1.1 × 10-2) and 0.15 M HClO (Ka= 2.9 ×10-8) can be determined by calculating the concentration of H+ ions and taking the negative logarithm of that concentration using the formula pH = -log[H+].

To calculate the concentration of H+ ions for the two solutions, we need to first calculate their dissociation constants (Ka).The dissociation constant (Ka) for HClO2 is 1.1 × 10-2; thus, its conjugate base ClO2- has a Kb = Kw/Ka = 1.0 × 10-14/1.1 × 10-2 = 9.09 × 10-13.

Using this value, we can calculate the concentration of H+ ions as follows: Kb = [H+][ClO2-]/[HClO2][ClO2-][H+] = Kb[HClO2]/[ClO2-]H+ = √(Kb[HClO2]) = √(9.09 × 10-13 x 0.15) = 1.8 × 10-7 mol/L. Now, taking the negative logarithm of the H+ ion concentration gives the pH: pH = -log[H+] = -log(1.8 × 10-7) = 6.74.

The dissociation constant (Ka) for HClO is 2.9 ×10-8; thus, its conjugate base ClO- has a Kb = Kw/Ka = 1.0 × 10-14/2.9 ×10-8 = 3.45 × 10-7. Using this value, we can calculate the concentration of H+ ions as follows: Kb = [H+][ClO-]/[HClO][ClO-][H+] = Kb[HClO]/[ClO-]H+ = √(Kb[HClO]) = √(3.45 × 10-7 x 0.15) = 6.39 × 10-5 mol/L.

Now, taking the negative logarithm of the H+ ion concentration gives the pH:pH = -log[H+] = -log(6.39 × 10-5) = 4.20.

Therefore, the pH of a solution that is 0.15 M HClO2 (Ka= 1.1 × 10-2) and 0.15 M HClO (Ka= 2.9 ×10-8) is 6.74 and 4.20, respectively.

To know more about logarithm visit:

https://brainly.com/question/30226560

#SPJ11

n2(g) 2o2(g)2no2(g) h° = 66.4 kj and s° = -121.6 j/k the equilibrium constant for this reaction at 257.0 k is

Answers

The balanced equation for the reaction is:N2(g) + 2O2(g) → 2NO2(g)Given that H° = 66.4 KJS° = -121.6 J/KThe standard free energy change (G°) at 298 K can be obtained using

the following formula G° = H° - T S°= 66.4 kJ - (298 K)(-121.6 J/K)= 66.4 kJ + 36.2 kJ= 102.6 The equilibrium constant can be obtained from the formula :K = e^(-G°/RT)Where :R = Gas constant = 8.314 J/mol.KT = Temperature = 257 K Let's substitute the values in the formula :K = e^(-G°/RT)K = e^(-102.6 kJ/mol / (8.314 J/mol.K)(257 K))= e^(-42380.74)= 1.43 x 10^-184:K = 1.43 x 10^-184And,The equilibrium constant for the reaction N2(g) + 2O2(g) → 2NO2(g) at 257 K is 1.43 x 10^-184. T

The equilibrium constant can be obtained from the formula: K = e^(-G°/RT), where R = 8.314 J/mol.K and T = 257 K. Substituting the values gives K = 1.43 x 10^-184.The explanation is that the equilibrium constant (K) is a measure of the ratio of the concentrations of products and reactants at equilibrium. The value of K depends on the standard free energy change (G°) of the reaction, which in turn depends on the enthalpy change (H°) and entropy change (S°) of the reaction

To know more about balanced visit;

https://brainly.com/question/27984374

#SPJ11

the molecules represented below are amines drawn in a condensed structure or a skeletal structure. an amine functional group is characterized by single bonds between carbon and nitrogen.

Answers

The given molecules can be written as condensed or skeletal structures. An amine functional group is usually characterized by single bonds between nitrogen and carbon.

For instance:  Methylamine (CH3NH2) can be written as follows:CH3NH2 or CH3-N-H. Explanation:Skeletal structures are commonly used to illustrate organic molecules. It is also used to display carbon-carbon bonds. The organic atoms and hydrogen atoms are represented in a skeletal structure. To represent the molecules, carbon and nitrogen atoms are commonly drawn at the corners of the lines in skeletal structures.

Amines are organic compounds that contain one or more amino (-NH2) functional groups. Amine functional groups have nitrogen atoms bonded to carbon atoms. The nitrogen is attached to two hydrogen atoms and one carbon atom in primary amines. Secondary and tertiary amines are characterized by the attachment of two or three carbon atoms to the nitrogen atom, respectively.

To know more about carbon visit:

https://brainly.com/question/3049557

#SPJ11

Without doing any calculations, determine the sign of ?Ssys for each chemical reaction.
a. Mg(s) + Cl2(g) ? MgCl2(s)
b. 2 H2S(g) + 3 O2(g) ? 2 H2O(g) + 2 SO2(g)
c. 2 O3(g) ? 3 O2(g)
d. HCl(g) + NH3(g) ? NH4Cl(s)

Answers

Thermodynamics is the study of energy transformations that occur in matter. The first law of thermodynamics states that energy is conserved, while the second law of thermodynamics states that entropy of a closed system can only increase or remain the same and can never decrease.

What is the sign of ∆S sys for each chemical reaction without doing any calculations? The sign of ∆S sys can be determined using the entropy of the reactants and products. Here's how to figure out the sign of ∆S sys without doing any calculations for each reaction: A. Mg(s) + Cl2(g) → MgCl2(s)In this reaction, a solid metal reacts with a gas to form a solid product. The disorder decreases since solids are less disorderly than gases. Thus, ΔSsys is negative.B. 2H2S(g) + 3O2(g) → 2H2O(g) + 2SO2(g)In this reaction, two gases react with three gases to form two gases and one liquid. The disorder decreases since gases are more disorderly than liquids, and there are fewer particles.

Thus, ΔSsys is negative. C. 2O3(g) → 3O2(g)In this reaction, two gases react to form three gases. The disorder increases since there are more particles. Thus, ΔSsys is positive. D. HCl(g) + NH3(g) → NH4Cl(s)In this reaction, two gases react to form a solid product. The disorder decreases since gases are more disorderly than solids. Thus, ΔSsys is negative. The answer is as follows: a. ΔSsys is negative. b. ΔSsys is negative. c. ΔSsys is positive. d. ΔSsys is negative.

To know more about Thermodynamics refer to:

https://brainly.com/question/30822943

#SPJ11

which of the following is the correct name for Cr2O3 is
O a. chromium(II) oxide
O b. chromium(III) oxide
O c. chromium(VI) oxide
O d. dichromium trioxide.

Answers

The name for Cr[tex]_2[/tex]O[tex]_3[/tex] is chromium(III) oxide. The correct answer is option b.

Chromium(III) oxide, also known as chromic oxide, is a green powder with the formula Cr[tex]_2[/tex]O[tex]_3[/tex]. Chromic oxide has a slightly complex crystal structure and is usually hydrated. The compound chromium(III) oxide (Cr[tex]_2[/tex]O[tex]_3[/tex]) is a green powder that is used as a pigment and metal polish.

In Cr[tex]_2[/tex]O[tex]_3[/tex], chromium (Cr) has a charge of +3, as indicated by the Roman numeral III in the name. Oxygen (O) has a charge of -2.

The prefix "di-" in the name "dichromium trioxide" indicates that there are two chromium atoms present in the compound. The term "tri-" indicates that there are three oxygen atoms present. Finally, "oxide" is added to indicate the presence of oxygen.

Therefore, the correct answer is option b. chromium(III) oxide.

Learn more about chromium(III) here:

https://brainly.com/question/20984455

#SPJ11

which sample has the largest mass? ,e'9'c c,o~ (a) i mole of marshmallows (c) 1 mole of c02 (carbon dioxide) molecules (b) i mole of pb (lead) atoms (d) all of these have the same mass.

Answers

Among the given options (b) 1 mole of Pb (lead) atoms has the largest mass.

To determine which sample has the largest mass, we need to compare the molar masses of each substance. The molar mass is the mass of one mole of a substance, expressed in grams.

(a) 1 mole of marshmallows: Marshmallows are composed of various compounds, so we cannot determine their exact molar mass without knowing their composition.

(b) 1 mole of Pb (lead) atoms: The molar mass of lead (Pb) is approximately 207.2 g/mol.

(c) 1 mole of CO₂ (carbon dioxide) molecules: The molar mass of carbon dioxide (CO₂) is approximately 44.01 g/mol.

Comparing the molar masses, we see that (b) 1 mole of Pb atoms has the largest molar mass (207.2 g/mol), followed by (c) 1 mole of CO₂ molecules (44.01 g/mol).

Therefore, the correct option is b.

Learn more about molar mass at https://brainly.com/question/837939

#SPJ11

at stp, what is the volume of 1.00 mole of carbon dioxide? a) 1.00 l b) 22.4 l c) 12.2 l d) 273 l e) 44.0 l

Answers

At standard temperature and pressure (STP), the volume of 1.00 mole of carbon dioxide is 22.4 L. According to the ideal gas law, at STP, one mole of any ideal gas occupies a volume of 22.4 liters.

Standard temperature is defined as 273.15 Kelvin (0 degrees Celsius) and standard pressure is 1 atmosphere (atm). These conditions are used as a reference point for comparing gases. In this case, carbon dioxide ([tex]CO_2[/tex]) is an ideal gas, and when 1.00 mole of it is at STP, it will occupy a volume of 22.4 liters.

This value is obtained from the molar volume of gases at STP, which is a constant. The molar volume is calculated by dividing the molar mass of the gas by its density at STP. In the case of carbon dioxide, its molar mass is 44.01 grams/mole, and its density at STP is approximately 1.964 grams/liter. Dividing the molar mass by the density yields the molar volume of 22.4 liters/mole. Therefore, the correct answer is option b) 22.4 L.

Learn more about  Standard temperature here:

https://brainly.com/question/29129606

#SPJ11

which bonds found in the hair can be easily broken by heat or water?

Answers

The hydrogen bonds found in hair can be easily broken by heat or water.

The amino acids that make up the protein keratin, which is the primary component of hair and nails, form hydrogen bonds, which are weak chemical bonds. Because they are easily disrupted by heat or moisture, hair can become frizzy or lose its shape when it is humid or when it is exposed to heat styling tools like curling irons or flat irons.

The ability of hair to stretch and return to its original shape is also due to hydrogen bonds. The hydrogen bonds in hair are temporarily broken when it is wet, allowing the hair to change shape. The bonds break down as the hair dries, and the hair takes on its original form. Because of this, wet hair can be easily shaped in a variety of ways, but once it dries, it will return to its original shape.

To know more about hydrogen bonds:

https://brainly.com/question/30885458

#SPJ11

what is undergoing reduction in the redox reaction represented by the following cell notation? mn(s) | mn 2 (aq) || h (aq) | h2(g) | pt

Answers

The substance undergoing reduction in the redox reaction represented by the given cell notation is hydrogen.

Redox reactions refer to reactions that involve the transfer of electrons from one substance to another. This occurs between two species, one of which undergoes oxidation, and the other undergoes reduction. The species that undergoes oxidation loses electrons while the species that undergoes reduction gains electrons.

In the given cell notation, the half-reactions are as follows:mn2+(aq) + 2e- → mn(s)E0 = -1.18 V2H+(aq) + 2e- → H2(g)E0 = 0 VFrom these half-reactions, we can conclude that Mn2+ is undergoing reduction while H+ is undergoing oxidation. Therefore, the substance undergoing reduction in the redox reaction represented by the given cell notation is hydrogen.

To know more about redox reaction visit:

https://brainly.com/question/28300253

#SPJ11

compounds that have two alkyl groups attached to an oxygen atom are called

Answers

Compounds that have two alkyl groups attached to an oxygen atom are called ethers. These compounds are commonly used as solvents and as reagents in various chemical reactions.

An ether is a class of organic compounds that consist of two alkyl or aryl groups bonded to the same oxygen atom. They are characterized by their unique structure, in which two hydrocarbon groups are connected to the same atom through a central oxygen atom. The oxygen atom is sp3-hybridized and possesses two unshared pairs of electrons.

Ethers have a general formula of R-O-R', where R and R' are alkyl or aryl groups. The simplest ether is dimethyl ether, which has two methyl groups attached to an oxygen atom. Ethers are usually named by naming the two alkyl or aryl groups bonded to the oxygen atom, followed by the word ether. For example, ethyl methyl ether has an ethyl group and a methyl group bonded to an oxygen atom.

To know more about chemical reactions visit:

https://brainly.com/question/29762834

#SPJ11

balance the following redox reaction if it occurs in acidic solution. what are the coefficients in front of h⁺ and fe in the balanced reaction? fe (aq) mno (aq) → fe (aq) mn (aq)

Answers

The balanced redox reaction in acidic solution is : Fe2+(aq) + MnO4-(aq) → Fe3+(aq) + Mn2+(aq). The coefficients in front of H and Fe^(3+) in the balanced reaction are 8 and 1, respectively.

Fe2+(aq) + 8H+(aq) + MnO4-(aq) → Fe3+(aq) + Mn2+(aq) + 4H2O(l).

To balance the redox reaction, we follow these steps:

Assigning oxidation numbers to all elements. Fe starts with an oxidation number of +2 and ends with +3, while Mn starts with +7 and ends with +2.

Writing two half-reactions, one for the oxidation process and one for the reduction process.

Oxidation half-reaction: Fe2+(aq) → Fe3+(aq)

Reduction half-reaction: MnO4-(aq) → Mn2+(aq)

Balancing the atoms except for H and O in each half-reaction. In the reduction half-reaction, there is only one Mn atom on both sides. In the oxidation half-reaction, there is only one Fe atom on both sides.

Balancing the oxygen atoms by adding H2O molecules. In the reduction half-reaction, we need 4 H2O molecules on the product side to balance the oxygen atoms. In the oxidation half-reaction, there are no oxygen atoms to balance.

Balancing the hydrogen atoms by adding H+ ions. In the reduction half-reaction, we need 8 H+ ions on the product side to balance the hydrogen atoms. In the oxidation half-reaction, there are no hydrogen atoms to balance.

Balancing the charges by adding electrons (e^-). In the reduction half-reaction, we need 5 electrons on the product side to balance the charges. In the oxidation half-reaction, we don't need any electrons.

Multiplying each half-reaction by an appropriate factor to make the number of electrons equal in both half-reactions. In this case, we multiply the oxidation half-reaction by 5 and the reduction half-reaction by 1.

Adding the two half-reactions together, canceling out the electrons.

The coefficients in front of H and Fe3+ in the balanced reaction are 8 and 1, respectively.

To know more about redox reaction, refer to the link:

https://brainly.com/question/13293425#

#SPJ11

At what temperature will 41.6 g of Nitrogen exert a pressure of 815 torr in a 20.0 L container?

Answers

At temperature 304.5 / [tex](T_2 (V_1 / V_2))[/tex] will 41.6 g of Nitrogen exert a pressure of 815 torr in a 20.0 L container

Let's assume that the temperature at which the nitrogen is stored is [tex]T_1[/tex], and the final temperature at which the nitrogen exerts a pressure of 815 torr is [tex]T_2[/tex]. From the ideal gas law, we know that PV = nRT where P is the pressure of the gas, V is the volume of the container, n is the number of moles of the gas, R is the universal gas constant, and T is the temperature of the gas.

The number of moles of nitrogen is:

mass/molar mass = 41.6 g / 28.014 g/mol = 1.484 moles

The initial pressure [tex]P_1[/tex], volume [tex]V_1[/tex], and temperature [tex]T_1[/tex]are unknown.

The final pressure[tex]P_2[/tex] is 815 torr, volume[tex]V_2[/tex] is 20.0 L, the number of moles n is 1.484, and R is 0.0821 L.atm/K.mol.

Substituting the values into the ideal gas law:

[tex](P_1  V_1)/ (n R T_1) = (P_2 V_2)/ (n R T_2)  (P_1 V_1)[/tex]/ (1.484 x 0.0821 x T1) = (815 x 20.0) / (1.484 x 0.0821 x T2) Rearranging the equation:

T2 = T1 x (815 x 20.0 x 1.484)/([tex]V_1[/tex]x 0.0821 x 1.484) = 304.5/T1

Therefore, [tex]T_2[/tex] and [tex]T_1[/tex]are inversely proportional to each other. This means that if[tex]T_2[/tex] increases, [tex]T_1[/tex]decreases proportionally, and vice versa.

So, in order to find [tex]T_2[/tex], we need to find [tex]T_1[/tex]. This can be done by rearranging the above equation :

T1 = 304.5 / [tex](T_2 (V_1 / V_2))[/tex] At the temperature [tex]T_1[/tex], the nitrogen will exert a pressure of 815 torr.

To know more about temperature refer here :

https://brainly.com/question/4735135

#SPJ11

How many types of ions must be present in solution, at minimum observed? the phenomenon of selective precipitation - Your answer should be whole number without any decimnal places.
Provide your answer below:

Answers

In order to observe the phenomenon of selective precipitation, a minimum of two different types of ions must be present in a solution.

What is selective precipitation?

The separation of one ion from a solution containing ions is known as selective precipitation. The most important component of selective precipitation is that it is very selective, meaning that only the ion you want to isolate is precipitated.

To have a clear understanding of the concept of selective precipitation, consider the following example:

Let us consider that we have two different types of ions (A+ and B-) in solution. When a reagent such as silver nitrate is added to the solution, both types of ions may form precipitates with the silver ion.However, the solution will contain only one precipitate because silver nitrate is very selective in nature and will only precipitate one of the ions. This phenomenon occurs due to the differences in solubilities between the two precipitates.

Learn more about the selective precipitation:

brainly.com/question/29807060

#SPJ11

The ethanol content of alcoholic beverages is sometimes expressed in terms of "proof." This term comes from a 17th century test for the alcohol content in whiskey. The whiskey was poured onto gunpowder and then set on fire. If the whiskey was too wet, the gunpowder would not ignite after the whiskey had burned off. However, if the whiskey had not been watered down, the gunpowder would ignite. A positive test required a minimum ethanol content of approximately 50% ethanol (by volume), which was called "100 proof." Whiskey with 40% ethanol is "80 proof," and so on. What is the approximate molar concentration of ethanol in 100 proof whiskey? The density of pure ethanol is 0.789 g mL-1. Report your answer to two significant figures. If the vapour pressure of water is 17.5 torr at 20°C, what is the water vapour pressure inside a bottle of 100 proof whiskey?

Answers

The approximate molar concentration of ethanol in 100 proof whiskey can be determined using the density of pure ethanol and the definition of "proof."

100 proof whiskey corresponds to 50% ethanol by volume. Since the density of pure ethanol is 0.789 g/mL, we can calculate the mass of ethanol in 1 mL of 100 proof whiskey as follows:
Mass of ethanol = 0.5 mL × 0.789 g/mL = 0.3945 g
Next, we need to convert the mass of ethanol to moles. The molar mass of ethanol (C2H5OH) is approximately 46.07 g/mol. Therefore, the molar concentration of ethanol in 100 proof whiskey is:
Molar concentration = (0.3945 g / 46.07 g/mol) = 0.00856 mol/L
The water vapour pressure inside a bottle of 100 proof whiskey can be approximated by considering the partial pressure of water in the bottle. Since the whiskey is not pure water, the vapour pressure of water will be lower than its pure vapour pressure at the given temperature. However, the exact calculation of water vapour pressure inside the bottle requires knowledge of the ethanol-water mixture composition, which is not provided in the question. Therefore, we cannot determine the water vapour pressure inside the bottle of 100 proof whiskey with the given information.

To know more about molar concentration, click here https://brainly.com/question/21841645

#SPJ11

Calculate the percent error if a thermometer reads 76.25 °C, and a reference thermometer reads 74.96 °C. b. The heat of neutralization in an experiment was determined to be -58.7 kJ/mol. The literature value for this heat of neutralization is –56.2 kJ/mol. Calculate the percent error.

Answers

The percent error for the thermometer reading is approximately 1.72%. For the heat of neutralization, the percent error is approximately 4.46%.

The percent error is calculated using the formula:

[tex]\[\text{{Percent Error}} = \left|\frac{{\text{{Experimental Value}} - \text{{Accepted Value}}}}{{\text{{Accepted Value}}}}\right| \times 100\%\][/tex]

For the thermometer reading, the experimental value is 76.25 °C and the accepted value is 74.96 °C. Plugging these values into the formula, we get:

[tex]\[\text{{Percent Error}} = \left|\frac{{76.25 - 74.96}}{{74.96}}\right| \times 100\% \approx 1.72\%\][/tex]

For the heat of neutralization, the experimental value is -58.7 kJ/mol and the accepted value is -56.2 kJ/mol. Plugging these values into the formula, we get:

[tex]\[\text{{Percent Error}} = \left|\frac{{-58.7 - (-56.2)}}{{-56.2}}\right| \times 100\% \approx 4.46\%\][/tex]

The percent error provides a measure of the deviation between the experimental and accepted values, expressed as a percentage. In both cases, a positive percent error indicates that the experimental value is higher than the accepted value, while a negative percent error indicates that the experimental value is lower. The percent error allows for comparison and evaluation of the accuracy of measurements or experimental results.

To learn more about neutralization refer:

https://brainly.com/question/23008798

#SPJ11

calculate δg° and k at 25°c for the following reactions. io3-(aq) fe2 (aq) equilibrium reaction arrow fe3 (aq) i2(aq)

Answers

δg° and k at 25°c the following reactions is 1.51 x 10^-28.

The given reaction is:

io3- + 2 Fe2+ + 2H+ → I2 + 2Fe3+ + H2O

To calculate δG° at 25°C (298K), we use the formula:

δG° = -nFE°cell,

whereF = Faraday’s constant (96,485 J/V)

E°cell = cell potential

n = number of electrons exchanged

The cell potential E°cell can be calculated by using the formula:

E°cell = E°reduction - E°oxidation

E°cell = E°(Fe3+|Fe2+) - E°(I2|I-)

Now, let’s calculate E°(Fe3+|Fe2+):Fe3+ + e- → Fe2+          

E° = +0.77 VI2 + 2e- → 2I-        E° = +0.54 V

Adding these two reactions, we get:Fe3+ + I- → Fe2+ + I2        E° = +1.31 V

Therefore,

E°(Fe3+|Fe2+) = +1.31 VE°(I2|I-) = -E°(Fe3+|Fe2+) = -1.31 V

Now, let’s calculate δG°:-nF

E°cell = δG°2 mol of electrons are exchanged (as the coefficient of electrons is 2 in the given reaction)δG° = -2 x 96,485 x (-1.31) J/mol= +252,466.2 J/mol= +252.5 kJ/mol

Therefore, the value of δG° for the given reaction is +252.5 kJ/mol.

Kc can be calculated using the following formula:

Kc = e^(-δG°/RT)

Where R = gas constant = 8.314 JK^-1 mol^-1T = temperature = 298 K

Substituting the values in the above equation,

Kc = e^(-(+252.5)/(8.314 x 298))Kc = 1.51 x 10^-28

To know more about Reaction visit:

https://brainly.com/question/16737295

#SPJ11

at a particular temperature, the solubility of in₂(so₄)₃ in water is 0.0064 m. what is the value of ksp?

Answers

The value of the solubility product constant (Ksp) for In₂(SO₄)₃ at the given temperature is approximately 2.62144 x 10⁻¹⁰.

The value of Ksp (solubility product constant) for In₂(SO₄)₃ can be calculated using the given solubility in water. The formula for the solubility product constant is:

Ksp = [In³⁺]² [SO₄²⁻]³

Given that the solubility of In₂(SO₄)₃ is 0.0064 M, we can assume that the concentration of In³⁺ and SO₄²⁻ ions in the saturated solution is also 0.0064 M.

Substituting these values into the formula, we get:

Ksp = (0.0064)² (0.0064)³

= 2.62144 x 10⁻¹⁰

Therefore, the value of the solubility product constant (Ksp) for In₂(SO₄)₃ at the given temperature is approximately 2.62144 x 10⁻¹⁰.

To know more about solubility product constant, refer to the link:

https://brainly.com/question/1419865#

#SPJ11

according to the ideal gas law, what happens to the volume of a gas when the pressure doubles (all else held constant)? apex

Answers

Pressure and volume are proportional in direct variation, with the temperature and the number of gas molecules constant.

According to the Ideal Gas Law, what happens to the volume of a gas when the pressure doubles (all else held constant)

If the pressure of a gas is doubled (all other variables being constant), the volume of the gas will be halved. The formula for the Ideal Gas Law is PV = nRT,

where P = pressure, V = volume,

n = number of moles of gas,

R = the universal gas constant, and T = temperature.

The law states that the product of pressure and volume is proportional to the absolute temperature of the gas when all other variables are constant.

In a fixed container with a fixed number of molecules, doubling the pressure reduces the volume by half. The relationship between pressure and volume is a positive linear one. Pressure and volume are proportional in direct variation, with the temperature and the number of gas molecules constant.

To know more about ideal gas law, visit:

https://brainly.com/question/12624936

#SPJ11

What data should be plotted to show that experimental concentration data fits a zero-order reaction? Select one: a. 1/[reactant) vs. time b. In(k) vs. Ea c. In(k) vs. 1/T d. In[reactant] vs. time e. [reactant) vs. time

Answers

The correct data that should be plotted to show that experimental concentration data fits a zero-order reaction is [reactant] vs. time.

A zero-order reaction is a reaction in which the rate of the reaction is independent of the concentration of the reactant. This means that the rate of the reaction remains constant, regardless of the concentration of the reactant. The rate equation of a zero-order reaction is given by: Rate = k[reactant]0 = k, where k is the rate constant. To show that the experimental concentration data fits a zero-order reaction, we need to plot the concentration of the reactant versus time.

The concentration of the reactant will remain constant throughout the reaction, so we will get a straight line with a negative slope. The slope of the line will give us the rate constant of the reaction, which will be constant throughout the reaction. Therefore, [reactant] vs. time should be plotted to show that experimental concentration data fits a zero-order reaction.

To know more about concentration visit:-

https://brainly.com/question/3045247

#SPJ11

Other Questions
Kelly Industries issued 7% bonds, dated January 1, with a face value of $150,000 on January 1, 2021. The bonds mature in 2031 /10 years) Interest is paid semiannually on June 30 and December 31. For bonds of similar risk and maturity the market yield is 9%. What was the issue price of the bonds? FV of $1. PV of $1. FVA of $1. PVA of $1. EVAD of $1 and PVAD of 51) (Use appropriate factor(s) from the tables provided.) Saved Helps Multiple Choice $68,292. $144,545. $113,126. $130,488. (a) what is the characteristic time constant of a 23.2 mh inductor that has a resistance of 4.21 ? ms (b) if it is connected to a 12.0 v battery, what is the current after 12.5 ms? a Joy Bionics Ltd. (Bionics) among other things sells robot kits and robotic systems. One of the replacement items that it holds in inventory is a "robocontroller". Bionics sells 1,125 robocontrollers annually. The cost to place an order for robocontrollers is $4.00, while the holding cost is 14.4% of the selling price. Joy purchases and takes delivery of the robocontroller from a supplier for an all in cost of $55. Joy operates 7 days a week working 50 weeks per year. The selling price of the robocontroller is $100. If a sale cannot be made because there are no controllers on hand, Joy forgoes the contribution margin on the robocontroller. Lead time on orders is 1 week.Bionics sales have been summarized and statistically analyzed the sales profile is as follows:Sales (units) 5 10 15 20 25 30 34Demand Probalility 0.09 0.06 0.25 0.2 0.24 0.15 0.01Required Calculate the following: show all calculation as your proof. a) EOQb) Re-order pointc) Number of orders that would be placed in a yeard) Total Relevant Coste) Calculate the appropriate level of safety stock Discussion Questions 1. Why do you think cyber crime is a threatening fraud? 2. What are the advantages and disadvantages of keeping a credit/ visa or debit card? 3. Having a cash less society is one of the aims of any developing or developed country. What could be the advantages and disadvantages of carrying your card around to undertake daily transactions? 4. Why are banks putting up measures such as limited transactions in a day by a customer, even though the money is owned by the customer and he or she should be allowed to undertake any number of transactions they like? 5. When a customer has suffered losses via credit card fraud, is it only the customer's loss or the bank's loss as well? Explain why or why not? 6. Find out the maximum amount of withdrawal you can make in a day using your access card from a Fijian bank. Why is there a limit this? 7. Some emails can be sent cloning as your employer asking for your information. What should you do in such a case? 8. What is the measure you should undertake if you identify any unusual transaction from your account? Why should you undertake that measure? 9. What measures has Fiji as a country undertaken to ensure it is safe from cyber fraud? 10. After studying the lecture on cyber fraud, what measures should you undertake to ensure that you and your employer is safe from cyber fraud? what is the wavelength that you hear if you are standing in front of the ambulance? what does a failover cluster node use to determine if another node is communicating? Question 36(Multiple Choice ) (04.06 MC) Assume that an economy is going through a slump and is experiencing less than ideal output levels and a decreased national income. Which one of the following actions can a central bank take in order to fix the economy? The central bank advises the government to increase taxes. The central bank increases the discount rate for commercial banks. O The central bank increases the reserve ratio of commercial banks. The central bank of the country buys securities via open market operations. The central bank of the country sells securities via open market operations. Question 34(Multiple Choice ) (04.07 MC) If an economy is experiencing equilibrium in the loanable funds market with an 8% interest rate, what are the consequences if the interest rate falls to 6%? O At lower interest rates, households will be willing to save more, and firms will be willing to invest more. O At lower interest rates, households will be willing to save more, and firms will be willing to invest less. O At lower interest rates, households will be willing to spend less, and firms will not be willing to invest more. O At lower interest rates, households will be willing to spend less, and firms will be willing to invest more. O At lower interest rates, households will be willing to spend more, and firms will be willing to invest more. A 64.0kg box hangs from a rope. What is the tension in the rope if:A. The box is at rest?Express your answer with the appropriate units.B. The box moves up a steady 5.40m/s ?Express your answer with the appropriate units.C. The box has vy = 4.50m/s and is speeding up at 5.30m/s2 ? The y axis points upward.Express your answer with the appropriate units.D. The box has vy = 4.50m/s and is slowing down at 5.30m/s2 ?Express your answer with the appropriate units. A fair die is rolled with sample space S = {1, 2, 3, 4, 5, 6}.Given this sample space, which of the following is an example ofsimple event?Select one:a.Less than 1.b.4.c.Even number.d.Mo Based on the excerpt from the wild swans at coole what can you infer about how william butler yeats views time? The form of business that does not carry unlimited personalliability for the owner isA.A general partnershipB.A sole proprietorshipC.A corporationD.None. All forms of busi Finite-State Machine for a simple elevator module elevator clock (~1Hz) clk input asynchronous reset button. input rst. go button input go input 3:0 dest floor output reg 13:01 curr floor, output door) indicate door open State assignments parameter parameter MOVE parameter DEEN reg [1:0] State next state; reg 13: 0] oto floor reg [2:0] latch the new destination floor always posedge clk if (go) oto floor dest floor code curr Eloor as a 4-bit up/down counter always posedge clk, posedge Est) if rst curr floor start at ground floor else if fill in add 5-second counter for door always osedge Clk, posedge rst) if (rst) Cnt else if fil ln Sequential logic always osedge clk osed rst) if (rst) state WAIT else State next State Next-state logic always begin next State State case State WAIT if (go) next State MOVE fil. ln PEN fill in end case end Output logic fill in assign door endmodule *please show all work and formula*41. You are considering an investment with the following cash flows. If the required rate of return for this investment is 13.5%, should you accept it based solely on the internal rate of return rule? 1. Skippy has the following utility function: u = xy and faces the budget constraint: M = Pxx+Pyy. (a) Use the MRS = Px/py and the budget constraint OR Lagrange method to find Skippy's demand functions, indirect utility and expenditure function. (b) Suppose M = 120, Py = 1 and P = 4. What is Skippy's optimal x, y and utility number? If the price of x was lowered to 2 what would be her x,y and utility number (c) What is the most Skippy would pay to have Pr lowered to 2? (d) Suppose M = 120, Py = 1 and Pr = 4. How much additional income would Skippy need to be as well off as if the price of a had fallen to 2? How many moles of HCl are there in 10 mL of a solution with a concentration of 0. 5 mol L-1? President George H.W. Bush gave a speech to Congress in which he described "A world where the rule of law supplants the rule of the jungle. A world in which nations recognize the shared responsibility for freedom and justice. A world where the strong respect the rights of the weak." Read the speech again, and then list the pros and cons of such a policy. What might the role of the United States be in global affairs based on this policy? Regression was used to estimate annual electricity cost ($000) per house and number of solar panels per house.Estimated Electricity cost = 3.48 - 0.25 Solar panelsWhich of the following is the correct interpretation of the slope?Estimate, for each extra solar panel installed in a house, the annual electricity cost decreases by an average of $250 per annum.Estimate, for each extra house, the number of solar panels decreases by 0.25 per annum.The annual electricity cost decreases by exactly $250 per annum.The annual electricity cost decreases by exactly $0.25 per annum.Estimate, for each extra solar panel installed in a house, the annual electricity cost decreases by an average of $0.25 per annum.Clear my choice Helots worked on Spartan _________________ and provided soldiers and families with food.A. Farms/landB. ShipsC. BarracksD. Temples A country does not trade with any other country. Its GDP is 20 billion and its government spending 2 billion. Each year the 8 billion of taxation is collected. The countries public saving amounts to 2 billion. What is the consumption and investment in the country? the proportion of phenotypic variation in a group of individuals due to genetic variance is called