calculate the mass of water produced when 1.58 g of butane reacts with excess oxygen.express your answer to three significant figures and include the appropriate units.

The kinetic theory states the movement of the molecules in a matter. The particles of oxygen at low temperatures slow down and losses their kinetic energy.

The kinetic theory states the motion and speed of the molecule of a matter. The theory states about the molecules separated by distance moving in a random motion that is constant.

The particles of the matter collide elastically with each other and this speed and collision depend on the temperature and pressure applied. The kinetic energy is directly dependent on the temperature.

As the temperature of oxygen gas decreases the collision and the speed of the particles also reduce resulting in less kinetic energy. It also leads to a drop in pressure.

Therefore, at low temperatures, kinetic energy, collision, and speed decrease.

Learn more about kinetic theory here:

https://brainly.com/question/15013597

#SPJ2

The role of sodium hydroxide in the synthesis of chalcone from acetophenone and benzaldehydeSodium hydroxide (NaOH) is a base, and in the synthesis of chalcone from acetophenone and benzaldehyde, it plays an essential role.

The base is added to the reaction mixture to increase its pH to a basic level, which results in the deprotonation of acetophenone. The reaction follows nucleophilic addition-elimination mechanism between the carbonyl group of acetophenone and benzaldehyde in the presence of NaOH.

The nucleophile is the deprotonated acetophenone and the electrophile is the benzaldehyde. The reaction leads to the formation of chalcone. The reaction is carried out by mixing the two reagents in the presence of NaOH, which acts as a catalyst.

The reaction mixture is then heated and stirred continuously for a few hours until the reaction is complete. The product is then separated from the reaction mixture by using a separating funnel and is washed with water and dried.

In the synthesis of chalcone from acetophenone and benzaldehyde, NaOH acts as a catalyst, increasing the pH of the reaction mixture to deprotonate acetophenone, which is an essential step in the reaction. Without NaOH, the reaction would be much slower, and the yield of the product would be significantly lower.

The impurities present in the product are usually removed by recrystallization. In this process, the impure chalcone is dissolved in a minimum amount of hot solvent and then cooled slowly. As the solution cools, the pure chalcone crystallizes out of the solution.

The crystals are then collected by filtration and washed with cold solvent to remove any remaining impurities. Recrystallization is a commonly used purification technique in organic chemistry that yields pure and crystalline products.

To know more about sodium hydroxide here

https://brainly.com/question/10073865

#SPJ11

The correct name for an aqueous solution of [tex]H_2S[/tex] is hydrosulfuric acid. Option A

Hydrosulfuric acid is formed when hydrogen sulfide ([tex]H_2S[/tex]) dissolves in water ([tex]H_2O[/tex]). The formula for hydrosulfuric acid is [tex]H_2S[/tex](aq). It is an acid because it donates a hydrogen ion (H+) when dissolved in water.

Option A: Hydrosulfuric acid is the correct name for [tex]H_2S[/tex]in an aqueous solution. It accurately reflects the composition of the compound and its acidic properties.

Option B: Hydrosulfurous acid is incorrect. It refers to a different compound, which is formed when sulfur dioxide ([tex]SO_2[/tex]) dissolves in water. The formula for hydrosulfurous acid is [tex]H_2SO_3[/tex].

Option C: Sulfuric acid is incorrect. Sulfuric acid has the chemical formula [tex]H_2SO_4[/tex], and it is not the same as hydrosulfuric acid ([tex]H_2S[/tex]).

Option D: Sulfurous acid is also incorrect. Sulfurous acid has the chemical formula [tex]H_2SO_3[/tex], and it is different from hydrosulfuric acid ([tex]H_2S[/tex]).

Option A

For more such questions on hydrosulfuric acid visit:

https://brainly.com/question/10220770

#SPJ8

Answer:

B: atomic mass subtracted from the atomic number.

Explanation:

In order to calculate the number of neutrons an element has, one must take the atomic mass for the element and subtract it from the atomic number.

Answer:

if I'm not mistaken, it is called a mixture

Answer:

mixture

Explanation:

Molar mass of ethanol (C2H5OH) = 46.07 g/mol . To find the theoretical yield of ethanol, we need to calculate the stoichiometric ratio between glucose and ethanol in the given reaction.

Given that the balanced equation for the fermentation of glucose to ethanol is:

C6H12O6 → 2 C2H5OH + 2 CO2

From the balanced equation, we can see that the stoichiometric ratio between glucose and ethanol is 1:2. This means that for every mole of glucose, we should theoretically produce 2 moles of ethanol.

(a) To calculate the theoretical yield of ethanol, we need to convert the mass of glucose to moles and then use the stoichiometric ratio to determine the moles of ethanol produced. Finally, we can convert the moles of ethanol back to grams.

Calculate the moles of glucose:

Molar mass of glucose (C6H12O6) = 180.16 g/mol

Moles of glucose = Mass of glucose / Molar mass of glucose

Moles of glucose = 71.0 g / 180.16 g/mol

Use the stoichiometric ratio to determine moles of ethanol:

Moles of ethanol = Moles of glucose × (2 moles of ethanol / 1 mole of glucose)

Convert moles of ethanol to grams:

Mass of ethanol = Moles of ethanol × Molar mass of ethanol

Molar mass of ethanol (C2H5OH) = 46.07 g/mol

(b) To calculate the percent yield, we need to compare the actual yield of ethanol to the theoretical yield.

Given that the actual yield of ethanol is 24.0 g, we can calculate the percent yield using the formula:

Percent yield = (Actual yield / Theoretical yield) × 100%

Substitute the values into the formula and calculate the percent yield.

It's important to note that the accuracy of the percent yield calculation depends on the reliability of the experimental measurement of the actual yield. Factors such as experimental errors, side reactions, and incomplete reactions can affect the actual yield and, consequently, the percent yield obtained.

To learn more about stoichiometric ratio click here:

brainly.com/question/6907332

#SPJ11

Answer:

the answer is C i just took the test

Explanation:

2AgNO3 + Ni Right arrow. Ni(NO3)2 + 2Ag

Considering the activity series, the reaction that will occur is:

2 AgNO₃ + Ni ⇒ Ni(NO₃)₂ + 2 Ag

Let's consider the following activity series.

Al > Mn > Zn > Cr > Fe > Cd > Co > Ni > Sn > Pb > H > Sb > Bi > Cu > Ag > Pd >Hg > Pt

F > Cl > Br > I

Elements that are more active will displace elements that are less active.

According to it, we will predict which reactions can occur.

NO. I is less active than Br so it won't displace it from NaBr.

NO. Fe is less active than Al si it won't displace it from Al₂O₃.

YES. Ni is more active than Ag so the reaction will occur.

NO. Pb is less active than Zn so it won't displace it from Zn(C₂H₃O₂)₂.

Considering the activity series, the reaction that will occur is:

2 AgNO₃ + Ni ⇒ Ni(NO₃)₂ + 2 Ag

Learn more: https://brainly.com/question/14129976

Answer:

The mass of lead is 216.6 g.

Explanation:

Given data:

Volume of lead = 19 mL

Mass of lead = ?

Solution:

To solve this problem we will apply the density formula.

In literature density of lead is 11.4 g/mL.

Density:

Density is equal to the mass of substance divided by its volume.

Units:

SI unit of density is Kg/m3.

Other units are given below,

g/cm3, g/mL , kg/L

Formula:

D=m/v

Now we will put the values.

11.4 g/mL = m/ 19 mL

m =  11.4 g/mL×19 mL

m = 216.6 g

The mass of lead is 216.6 g.

Answer:

Hello,

Clouds form as a result of condensation.

Explanation:

The definition of condensation is, 'the conversion of a vapor or gas to a liquid.'

Answer:

condensation.

Explanation:

Answer: Rate of change in the concentration of the reactants = -(1/α)* (ΔX/Δt)=-(1/β)(ΔB/Δt)

Explanation: Consider the following reaction:

                    α X + β B → γ Y + δ D

Then the rate of change in the concentration of reaction = -(1/α)* (ΔX/Δt)=

-(1/β)(ΔB/Δt)

To learn more rate of change in reaction:

https://brainly.com/question/30976589

Answer:

Explanation:

Hope this helped!

Answer: Density is 0.39g/ml and will float

Explanation:

Density is mass/volume : 1.95g/5.0ml = 0.39g/ml

This sample will float on water because a object with a density less than 1g/cm3 will float. 1 cubic centimeter equal 1 ml.

130 Joules of heat is absorbed when the temperature of a 11.8 g sample of calcium carbonate [caco3 (s)] increases from to if the specific heat of calcium carbonate.

To solve the given problem, we will use the formula:q = mcΔTwhere q is the heat absorbed by the substance, m is the mass of the substance, c is the specific heat of the substance, and ΔT is the change in temperature of the substance.We are given:m = 11.8 gΔT = 41.8 °C - 22.7 °C = 19.1 °Cc = 0.82 J/g·°CSubstitute the given values into the formula and solve for q:q = (11.8 g)(0.82 J/g·°C)(19.1 °C)= 130 JTherefore, 130 joules of heat are absorbed by the substance.

The correct option is D which is 130 J.

To know more about wavelength visit:

brainly.com/question/20294301

#SPJ11

Answer:

Unlike electronegativity, the electron affinity does not have a strong periodic value. The electron affinity measures the energy released when an electron is captured by the atom (or a molecule), forming an anion with a 1− charge.

Explanation:

Given: Volume (V) = 146 mL, Molarity (M) = 0.150 M, Molar mass of Mg(NO₃)₂ = 148.31 g/molTo find: mass (in grams) of Mg(NO₃)₂Presently, we have Molarity of Mg(NO₃)₂ .i.e., 0.150 M = 0.150 mol/L .

Now, we need to convert the volume from mL to L by dividing the volume by 1000 as shown below;

Volume (V) = 146 mL = 146/1000 L = 0.146 L.

Now, we can use the following formula to find the number of moles of solute (Mg(NO₃)₂) :Number of moles (n) = Molarity (M) × Volume (V)

Putting values in the above equation, we get:

Number of moles (n) = 0.150 mol/L × 0.146 L

= 0.0219 mol

Now, we can use the molar mass formula to find the mass of Mg(NO₃)₂ ; Molar mass (M) of Mg(NO₃)₂ = 148.31 g/mol

Mass (m) = Number of moles (n) × Molar mass (M)

Putting values in the above equation, we get;

Mass (m) = 0.0219 mol × 148.31 g/mol = 3.25 g.

Hence, the main answer is 3.25 grams.

Therefore, the mass (in grams) of Mg(NO₃)₂ present in 146 ml of a 0.150 M solution of Mg(NO₃)₂ is 3.25 grams.

From the above solution, we can conclude that we need to find the mass (in grams) of Mg(NO₃)₂ which is present in 146 mL of a 0.150 M solution of Mg(NO₃)₂.

We have used the formula of Molarity to find the number of moles of Mg(NO₃)₂. We have also converted the given volume from milliliters (mL) to liters (L).

We have used the molar mass formula to find the mass of Mg(NO₃)₂ .i.e., the product of number of moles and molar mass of Mg(NO₃)₂. The Molar mass of Mg(NO₃)₂ is 148.31 g/mol. We have substituted the given values in the above formulas and solved the problem. The final answer is 3.25 grams.

To learn more about Molarity click:

brainly.com/question/31545539

#SPJ11

Answer:

c

Explanation:

because it has potassium

The first ionization energy of tellurium is greater than that of selenium due to increased effective nuclear charge and larger atomic size.

The first ionization energy of tellurium is greater than that of selenium due to the increased effective nuclear charge and larger atomic size of tellurium. Tellurium has more protons in its nucleus compared to selenium, resulting in a stronger attraction between the protons in the nucleus and the electrons in the outermost energy level.

This increased attraction requires more energy to remove an electron from the atom, thus resulting in a higher first ionization energy for tellurium. Additionally, tellurium has a larger atomic size, which leads to a greater distance between the outermost electrons and the nucleus. This larger distance reduces the effective nuclear charge felt by the outermost electrons, making it slightly easier to remove an electron compared to selenium. However, the effect of increased effective nuclear charge in tellurium outweighs the influence of atomic size, resulting in a higher first ionization energy for tellurium.

To know more about ionization refer here

https://brainly.com/question/1602374#

#SPJ11

Answer:

And so many more.

Due to all these similarities ,they have similar  properties and they tend to react similarly with other substances.

Explanation:

Answer:

The number of valence electrons.

Explanation:

Electrons mainly have to do with the reactions and how bonds are formed between elements. Elements are placed in groups based on the number of valence electrons. The number of valence electrons determine the element's properties such as its reactivity with other elements. Therefore, the reason why elements in the same group have similar properties is because each group has the same amount of valence electrons (number of electrons in outermost shell) which affects its properties.

The pH of the aqueous solution is 1.52, which suggests a highly acidic nature.

The pOH of an aqueous solution is given as 12.48. To calculate the pH, we can use the relationship between pH and pOH, which states that pH + pOH = 14. Therefore, we can find the pH by subtracting the pOH from 14. To calculate the pH from the pOH value, we can use the relationship pH + pOH = 14, which holds true for any aqueous solution at 25°C. In this case, we are given the pOH value of 12.48. Substituting the given value into the equation, we have pH + 12.48 = 14. To find the pH, we need to isolate it on one side of the equation. Subtracting 12.48 from both sides, we get pH = 14 - 12.48 = 1.52.

Therefore, the pH of the aqueous solution is 1.52. The pH scale is a logarithmic scale that measures the acidity or basicity of a solution. A pH value below 7 indicates acidity, while a pH value above 7 indicates alkalinity. A pH of 1.52 indicates a strongly acidic solution.

In summary, the pH of the aqueous solution is 1.52, which suggests a highly acidic nature. This information is valuable in understanding the properties and behavior of the solution, as acidity or alkalinity can influence chemical reactions, biological processes, and the overall behavior of substances dissolved in the solution.

To learn more about pH click here:

brainly.com/question/2288405

#SPJ11

Answer:

1. Chief executive officer = Nucleus.

2. Power house = Mitochondrion.

3. Maintenance team = Lysosomes.

4. Functional managers = Chromosomes.

5. Assembly line workers = Ribosomes.

6. Assembly line = Endoplasmic Reticulum.

7. Security and support = Cytoskeleton.

8. Drivers or messengers = Vesicles.

9. Packaging unit = Golgi apparatus.

10. Gate man/procurement unit = Cell membrane.

Explanation:

A cell can be defined as the structural, fundamental, biological and functional unit of life. Cells are found in all living organisms because they are the basic unit of life.

Generally, cells have the ability to independently replicate themselves. These cells can be compared to the kind of structures found in a business or factory, where you have different workers performing different functions.

In a cell, the "workers" that perform various functions or tasks for the survival of the living organism are referred to as organelles.

Factory worker = Cell organelle.

1. Chief executive officer = Nucleus.

2. Power house = Mitochondrion.

3. Maintenance team = Lysosomes.

4. Functional managers = Chromosomes.

5. Assembly line workers = Ribosomes.

6. Assembly line = Endoplasmic Reticulum.

7. Security and support = Cytoskeleton.

8. Drivers or messengers = Vesicles.

9. Packaging unit = Golgi apparatus.

10. Gate man/procurement unit = Cell membrane.

Answer:

Scientific law

Explanation:

Because its based on experiments or observations, that describe or predict a range of natural phenomena.

A hypothesis is a limited explanation of a phenomenon;a scientific theory is an in-depth explanation of the observed phenomenon.

The time required for a reaction to reach equilibrium can depend on the value of Kc, which represents the equilibrium constant. The equilibrium constant, Kc, is determined by the concentrations of the reactants and products at equilibrium.

In general, reactions with a larger Kc value tend to reach equilibrium more quickly than those with a smaller Kc value. This is because a larger Kc indicates that the concentration of products is higher compared to the concentration of reactants at equilibrium. As a result, the reaction proceeds more rapidly to reach the point where the ratio of products to reactants matches the value of Kc.

Therefore, among the given options, the answer would be option (c) where Kc is a very large number. In this case, the reaction would require the least amount of time to reach equilibrium.

It's important to note that the actual time required for a reaction to reach equilibrium depends on various factors such as temperature, pressure, and the presence of catalysts. Additionally, the time required for a reaction to reach equilibrium cannot be determined solely based on the value of Kc. However, in general, a larger Kc value suggests a quicker attainment of equilibrium.

Learn more about equilibrium here :-

https://brainly.com/question/14281439

#SPJ11

To produce 55.7 moles of H2, an equal number of moles of H2O is required. Therefore, 55.7 moles of H2O are needed.

The balanced chemical equation for the reaction in which H2 is produced from H2O is:

2H2O → 2H2 + O2

According to the stoichiometry of the equation, for every 2 moles of H2O, 2 moles of H2 are produced. This means that the mole ratio of H2O to H2 is 2:2, or simply 1:1.

Given that 55.7 moles of H2 are needed, the same number of moles of H2O is required. Therefore, 55.7 moles of H2O are needed to produce 55.7 moles of H2. The mole ratio of the reactants directly translates to the number of moles needed to obtain a certain amount of product in a stoichiometrically balanced equation.

To learn more about reactants click here:

brainly.com/question/30129541

#SPJ11

Answer:

B) From the car

Explanation:

The car is in motion

the mass defect is 26.436832 amu, the binding energy is 6.53220238 x 10¹² J/mol, and the binding energy is 4.0771637 x 10⁴ MeV/atom for Mg-26.

To calculate the mass defect, binding energy in joules per mole (J/mol), and binding energy in mega-electron volts per atom (MeV/atom), we need to use Einstein's mass-energy equivalence equation, E = mc².

The mass defect (Δm) can be calculated by subtracting the experimentally determined atomic mass (m) of Mg-26 from its nominal mass (m0), which can be calculated by summing the masses of individual protons, neutrons, and electrons.

The binding energy (E) can be calculated by multiplying the mass defect by the speed of light squared (c²). Then, the binding energy in J/mol can be obtained by dividing the binding energy by Avogadro's constant (NA). Finally, the binding energy in MeV/atom can be obtained by dividing the binding energy in J/mol by the conversion factor 1.6022 x 10⁻¹³.

Given:

Experimental atomic mass of Mg-26 (m) = 25.98259 amu

To calculate the nominal mass (m0) of Mg-26, we can refer to the atomic mass of individual particles:

Proton mass = 1.007276 amu

Neutron mass = 1.008665 amu

Electron mass = 0.000548597 amu

Nominal mass (m0) of Mg-26 = (26 protons * proton mass) + (26 neutrons * neutron mass) + (26 electrons * electron mass)

Let's calculate the values:

m0 = (26 * 1.007276) + (26 * 1.008665) + (26 * 0.000548597)

  = 26.185776 + 26.21939 + 0.014256622

  = 52.419422 amu

Now we can calculate the mass defect (Δm):

Δm = m0 - m

   = 52.419422 - 25.98259

   = 26.436832 amu

To calculate the binding energy in J/mol:

E = Δm * c²

First, we need to convert amu to kg (kilograms). The conversion factor is:

1 amu = 1.66053906660 x 10⁻²⁷ kg

Converting the mass defect to kilograms:

Δ[tex]m_{kg}[/tex] = Δm * (1.66053906660 x 10⁻²⁷)

       = 26.436832 * (1.66053906660 x 10⁻²⁷)

       = 4.3811076256 x 10⁻²⁶ kg

Next, we need to calculate the binding energy (E) in joules:

E = Δ[tex]m_{kg}[/tex] * c²

The speed of light, c = 2.998 x 10⁸ m/s

E = (4.3811076256 x 10⁻²⁶ kg) * (2.998 x 10⁸ m/s)²

  = 3.93766794178 x 10⁻¹¹ J

To calculate the binding energy in J/mol, we divide E by Avogadro's constant (NA):

NA = 6.02214076 x 10²³ mol⁻¹ (Avogadro's constant)

Binding energy in J/mol = E / NA

                          = (3.93766794178 x 10⁻¹¹ J) / (6.02214076 x 10²³ mol⁻¹)

                          = 6.53220238 x 10¹² J/mol

Finally, to calculate the

binding energy in MeV/atom, we divide the binding energy in J/mol by the conversion factor 1.6022 x 10⁻¹³:

Binding energy in MeV/atom = (6.53220238 x 10¹² J/mol) / (1.6022 x 10⁻¹³ J/MeV)

                                       = 4.0771637 x 10⁴ MeV/atom

To know more about energy visit:

brainly.com/question/1932868

#SPJ11

Answer: 48.5 hours

Explanation:

Answer:

The answer is 9.47164 the decimal goes on but I think that is enough places.

Explanation:

First, you have to find the area of the pool 9*3.5*1.75= 55.125 meters

Then convert meters to liters to get 55125 liters.

Then you take 55125 liters and put it over min. EX 55125/min

to get minutes you multiply the hours by 60 to get 5820 minutes.

this allowes you to put 55125/5820 then it is a division problem.

The problem after dividing geves you 9.47164......

Answer:

It's 120 g

Explanation:

I'm doing that question on ck12 and it's correct.

Answer:

Explanation:

The density of a substance can be found by using the formula

[tex]density = \frac{mass}{volume} \\[/tex]

From the question

mass = 10.686 g

volume of liquid gallium = 54.5 mL

So we have

[tex]density = \frac{10.686}{54.5} \\ = 0.1960733944...[/tex]

We have the final answer as

Hope this helps you

a) the standard enthalpy of formation for the Cl- ions is -149.8 kJ/mol. b) the standard enthalpy of formation for the hydroxide ion (OH-) at 25°C is -342.0 kJ/mol.

(a) To calculate the standard enthalpy of formation (ΔfH°) for the Cl- ions, we can use the given information about the reaction enthalpy (ΔrH°) for the formation of H+ and Cl- ions from gaseous HCl.

The reaction is: HCl(g) → H+(aq) + Cl-(aq)

Since the enthalpy change (ΔrH°) for the reaction is given as -74.9 kJ/mol, it represents the sum of the standard enthalpies of formation for the products minus the standard enthalpy of formation for the reactant.

ΔrH° = ΣΔfH°(products) - ΔfH°(reactant)

For this reaction, the reactant is HCl(g), and the products are H+(aq) and Cl-(aq). The standard enthalpy of formation for H+(aq) is given as 0, so we can rewrite the equation as:

-74.9 kJ/mol = ΔfH°(H+(aq)) + ΔfH°(Cl-(aq)) - ΔfH°(HCl(g))

Plugging in the known values, we get:

-74.9 kJ/mol = 0 + ΔfH°(Cl-(aq)) - ΔfH°(HCl(g))

Since we want to find the standard enthalpy of formation for Cl-(aq), we isolate ΔfH°(Cl-(aq)):

ΔfH°(Cl-(aq)) = -74.9 kJ/mol + ΔfH°(HCl(g))

Substituting the given value of ΔrH° for the reaction:

ΔfH°(Cl-(aq)) = -74.9 kJ/mol + (-74.9 kJ/mol)

Simplifying the expression, we find:

ΔfH°(Cl-(aq)) = -149.8 kJ/mol

(b) To calculate the standard enthalpy of formation (ΔfH°) of the hydroxide ion (OH-) at 25°C, we can use the information about the standard enthalpy of neutralization (ΔH°n) between HCI and NaOH.

The neutralization reaction between HCI and NaOH is:

H+(aq) + OH-(aq) → H2O(l)

The enthalpy change for this reaction, ΔH°n, is given as -56.2 kJ/mol.

The standard enthalpy of formation of water (H2O) is -285.8 kJ/mol. Using this information, we can rewrite the equation as:

ΔH°n = ΣΔfH°(products) - ΣΔfH°(reactants)

-56.2 kJ/mol = 0 + ΔfH°(OH-(aq)) - (-285.8 kJ/mol)

Simplifying the expression, we find:

-56.2 kJ/mol = ΔfH°(OH-(aq)) + 285.8 kJ/mol

ΔfH°(OH-(aq)) = -56.2 kJ/mol - 285.8 kJ/mol

ΔfH°(OH-(aq)) = -342.0 kJ/mol

Learn more about enthalpy at: brainly.com/question/29145818

#SPJ11