Answer:
If a person pushes something and it doesn't change its position then it is called balanced force.
an aqueous solution of h2s is named group of answer choices hydrosulfuric acid. hydrosulfurous acid. sulfuric acid. sulfurous acid.
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
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Which picture above represents a mixture?
A
B
C
Answer:
b
Explanation:
because the others are compound and element
brainlllist plz
Which of the following will require the least time for a reaction to reach equilibrium? O a. Cannot tell, since the time required to reach equilibrium does not depend on Kc. O b. Cannot tell without knowing the value of Kc- O c. Kc is a very large number. O d. Kc is a very small number. O e. Kc is approximately one.
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.
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What - is the role of the sodium hydroxide in the synthesis of chalcone from acetophenone and benzaldehyde? To Wach theimpuntles ym Hh eproduct during the RecyeIa li2attion proccsz
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.
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If chemical reactions involve atoms disconnecting from each other and then connecting with different atoms in different ways, why do you think energy would go into or out of chemical reactions? In other words, how could energy be involved in disconnecting or connecting atoms to each other?
Answer: Energy can be involved in disconnecting or connecting atoms to each other as the energy is used to break the bonds between the atoms ,so the reaction could proceed.
Explanation: The statement can be well explained by the Planck's quantum theory , which states -:
In the form of small energy packets known as quanta of energy, energy is not released continuously, but discontinuously.The energy of each quantum is directly proportional to radiation frequency, i.e. E is directly proportional to v, where v is frequency E = hv, where h is the proportionality constant known as the constant of Planck.Any integer quanta will be the total energy of the radiation emitted or absorbed. Let the 'E' be the total radiation energy. So, when n is an integer, E'=nhv.Hence, the given answer is based on the Planck's Quantum theory.
Considering the activity series given below for metals and nonmetals, which reaction will occur?
Al > Mn > Zn > Cr > Fe > Cd > Co > Ni > Sn > Pb > H > Sb > Bi > Cu > Ag > Pd >Hg > Pt
F > Cl > Br > I
2NaBr + I2 Right arrow. 2NaI + Br2
2Fe + Al2O3 Right arrow. 2Al + Fe2O3
2AgNO3 + Ni Right arrow. Ni(NO3)2 + 2Ag
Pb + Zn(C2H3O2)2 Right arrow. Zn + Pb(C2H3O2)2
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.
2 NaBr + I₂ ⇒ 2 NaI + Br₂NO. I is less active than Br so it won't displace it from NaBr.
2 Fe + Al₂O₃ ⇒ 2 Al + Fe₂O₃
NO. Fe is less active than Al si it won't displace it from Al₂O₃.
2 AgNO₃ + Ni ⇒ Ni(NO₃)₂ + 2 Ag
YES. Ni is more active than Ag so the reaction will occur.
Pb + Zn(C₂H₃O₂)₂ ⇒ Zn + Pb(C₂H₃O₂)₂
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
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1 point
Thermal energy is due to the movement of molecules and the heat they
produce. Thermal energy is therefore
potential energy
kinetic energy
none of the above
Could someone help me answer these questions with the answer and typed steps for how each answer was found? I asked this question previously but, I could not read the handwritten answer.
7. A 25 g soil sample was extracted with 75 mL of NH4OAc (pH 7.0), and the filtrate was analyzed
on an atomic absorption unit. The following results were obtained:
100 mg/L Ca2+, 45 mg/L Mg2+, 85.5 mg/L K+, 94.2 mg/L Al3+ and 8.0 mg/L H+.
a. What is the CEC in cmol(+)/kg for this sample?
b. What is the % B.S. for this soil?
c. What is the % acid saturation for this soil sample?
The CEC for this soil sample is 675.2 cmol(+)/kg.
The % Base Saturation for this soil sample is approximately 136.62%.
The % Acid Saturation for this soil sample is approximately 60.55%.
To calculate the CEC, % Base Saturation (B.S.), and % Acid Saturation for the given soil sample:
a. Calculation of CEC (Cation Exchange Capacity):
CEC is the sum of exchangeable cations in the soil. From the given results, we have:
CEC = Ca2+ + Mg2+ + K+ + Al3+
CEC = (100 mg/L + 45 mg/L + 85.5 mg/L + 94.2 mg/L) / (25 g / 1000)
CEC = 168.7 mg / (25 g / 1000)
CEC = 675.2 cmol(+)/kg
b. Calculation of % Base Saturation (B.S.):
% B.S. represents the percentage of CEC occupied by base cations. In this case, we consider Ca2+, Mg2+, and K+ as base cations. The formula to calculate % B.S. is:
% B.S. = (Ca2+ + Mg2+ + K+) / CEC * 100
% B.S. = (100 mg/L + 45 mg/L + 85.5 mg/L) / (168.7 cmol(+)/kg) * 100
% B.S. = 230.5 mg / (168.7 cmol(+)/kg) * 100
% B.S. = 136.62%
c. Calculation of % Acid Saturation:
% Acid Saturation represents the percentage of CEC occupied by acid cations, in this case, H+ and Al3+. The formula to calculate % Acid Saturation is:
% Acid Saturation = (H+ + Al3+) / CEC * 100
% Acid Saturation = (8.0 mg/L + 94.2 mg/L) / (168.7 cmol(+)/kg) * 100
% Acid Saturation = 102.2 mg / (168.7 cmol(+)/kg) * 100
% Acid Saturation = 60.55%
Please note that the given values were in milligrams per liter (mg/L), and the CEC and % Saturation values were calculated assuming a conversion from mg/L to cmol(+)/kg using the mass of the soil sample (25 g).
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In making wine, glucose (C6H12O6) is fermented to produce ethanol (C2H5OH) and carbon dioxide (CO2), according to the following reaction.
C6H12O6 → 2 C2H5OH + 2 CO2
(a) If the fermentation reaction starts with 71.0 g glucose, what is the theoretical yield of ethanol (in grams)? i need the correct number of sig figs also
(b) If 24.0 g ethanol is produced, what is the percent yield of this reaction? i need the correct number of sigfigs also.
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.
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Question 1
1 pts
What is it called when more than one element is combined, but do not loose their individual chemical properties?
Answer:
if I'm not mistaken, it is called a mixture
Answer:
mixture
Explanation:
how do batteries use of electron affinity to work?
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:
the temperature of a 11.8 g sample of calcium carbonate [caco3 (s)] increases from to if the specific heat of calcium carbonate is how many joules of heat are absorbed? group of answer choices -0.92 j -130 j 11 j 130 j 0.92 j
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.
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if you start with 3.55g of salicylic acid, and add 5.0ml of acetic anhydride, will you add enough of the anhydride for the reaction to proceed to completion? show your calculations. show the calculation for the theoretical yield. what is the % yield of this synthesis if you collect 3.91g of the product.
To determine if enough acetic anhydride is added for the reaction to proceed to completion, the amount of salicylic acid present is used as the limiting reagent.The reaction between salicylic acid and acetic anhydride is an esterification reaction and can be represented as follows:Salicylic acid + acetic anhydride → aspirin + acetic acid
The molecular weight of salicylic acid is 138.12 g/mol, while that of acetic anhydride is 102.09 g/mol.Therefore, the amount of salicylic acid in grams is 3.55 g, and the amount of acetic anhydride in moles is calculated using the formula:No. of moles of acetic anhydride = volume of acetic anhydride (in mL) × density of acetic anhydride (in g/mL) / molecular weight of acetic anhydride= 5.0 × 1.08 / 102.09= 0.0523 mol.Thus, the amount of acetic anhydride is greater than the amount of salicylic acid, which indicates that enough acetic anhydride was added for the reaction to proceed to completion.
To calculate the theoretical yield of aspirin, the amount of salicylic acid used is taken as the limiting reagent, and the molecular weight of aspirin is 180.16 g/mol.The theoretical yield is calculated using the formula:Theoretical yield of aspirin = (mass of salicylic acid × 1 mol salicylic acid / 138.12 g salicylic acid) × (1 mol aspirin / 1 mol salicylic acid) × 180.16 g aspirin / 1 mol aspirin= (3.55 × 1 / 138.12) × (1 × 180.16)= 1.46 gThe percentage yield of the synthesis is calculated using the formula:Percent yield = (actual yield / theoretical yield) × 100%= (3.91 / 1.46) × 100%= 267.81%.Therefore, enough acetic anhydride was added for the reaction to proceed to completion, and the theoretical yield of aspirin is 1.46 g. The percentage yield of the synthesis is 267.81% if 3.91 g of the product is collected. It is important to note that a percentage yield greater than 100% indicates that an error occurred during the experiment, such as incomplete removal of impurities.
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pull
friction
A basket of apples is pulled with a constant force. A friction force acts in a direction opposite to the motion. The basket starts at rest and
increases its speed over time. Choose three actions that will REDUCE the rate at which the speed of the basket changes.
Pull with less force
Pull with more force
Add an apple to the basket
Take an apple out of the basket
Smooth the surface of the table to decrease friction
Roughen the surface of the table to increase friction
Answer:
Pull with less force, Add an apple to the basket, and Roughen the surface of the table to increase friction
Explanation:
Draw Molecular diagrams of solid, liquid, gas and plasma phases of matter.
Answer:
Explanation:
Hope this helped!
Determine [OH−] and [H3O+] for a 0.13 M NaOH solution.
Determine [OH−] and [H3O+] for a 5.0×10^-4 M Sr(OH)2 solution.
Determine [OH−] and [H3O+] for a 1.6×10^−3 M Ca(OH)2 solution.
Determine [OH−][OH−] and [H3O+][H3O+] for an 8.5×10^−5 M KOH Solution.
The [OH-] and [H3O+] concentrations for (a) 0.13 M NaOH solution : [OH-] = 0.13 M, [H3O+] = 7.69 x 10^-14 M ; (b) 5.0 × 10^-4 M Sr(OH)2 solution : [OH-] = 1.0×10^-3 M, [H3O+] = 1.0 x 10^-11 M ; (c) 1.6×10^−3 M Ca(OH)2 solution : [OH-] = 3.2×10^−3 M, [H3O+] = 3.13 x 10^-12 M and (d) 8.5×10^−5 M KOH solution : [OH-] = 8.5×10^−5 M, [H3O+] = 1.18 x 10^-10 M.
To determine the hydroxide ion concentration ([OH-]) and hydronium ion concentration ([H3O+]) for the given solutions, we can use the fact that in water, there is an equilibrium between water molecules and the ions it produces:
H2O ⇌ H3O+ + OH-
The equilibrium constant for this reaction is defined as Kw = [H3O+][OH-], where Kw is the ion product of water and has a value of 1.0 x 10^-14 at 25 degrees Celsius.
Using this information, we can calculate the hydroxide ion concentration and hydronium ion concentration for each solution:
For a 0.13 M NaOH solution:
Since NaOH is a strong base, it dissociates completely in water to produce Na+ and OH- ions. Therefore, the [OH-] concentration is equal to the concentration of NaOH, which is 0.13 M.
The [H3O+] concentration can be calculated using Kw :
[H3O+] = Kw / [OH-] = (1.0 x 10^-14) / (0.13) = 7.69 x 10^-14 M.
For a 5.0×10^-4 M Sr(OH)2 solution:
Sr(OH)2 is also a strong base, so it dissociates completely in water to produce Sr2+ and 2 OH- ions.
The [OH-] concentration is twice the concentration of Sr(OH)2, which is 2 × 5.0×10^-4 M = 1.0×10^-3 M.
Using Kw, we can calculate the [H3O+] concentration : [H3O+] = Kw / [OH-] = (1.0 x 10^-14) / (1.0×10^-3) = 1.0 x 10^-11 M.
For a 1.6×10^−3 M Ca(OH)2 solution:
Similar to Sr(OH)2, Ca(OH)2 is a strong base and dissociates completely in water. The [OH-] concentration is twice the concentration of Ca(OH)2, which is 2 × 1.6×10^−3 M = 3.2×10^−3 M.
Using Kw, we can calculate the [H3O+] concentration : [H3O+] = Kw / [OH-] = (1.0 x 10^-14) / (3.2×10^−3) = 3.13 x 10^-12 M.
For an 8.5×10^−5 M KOH solution:
KOH is another strong base and dissociates completely in water. The [OH-] concentration is equal to the concentration of KOH, which is 8.5×10^−5 M.
Using Kw, we can calculate the [H3O+] concentration: [H3O+] = Kw / [OH-] = (1.0 x 10^-14) / (8.5×10^−5) = 1.18 x 10^-10 M.
So, the [OH-] and [H3O+] concentrations for each solution are as follows:
For the 0.13 M NaOH solution: [OH-] = 0.13 M, [H3O+] = 7.69 x 10^-14 M.For the 5.0×10^-4 M Sr(OH)2 solution: [OH-] = 1.0×10^-3 M, [H3O+] = 1.0 x 10^-11 M.For the 1.6×10^−3 M Ca(OH)2 solution: [OH-] = 3.2×10^−3 M, [H3O+] = 3.13 x 10^-12 M.For the 8.5×10^−5 M KOH solution: [OH-] = 8.5×10^−5 M, [H3O+] = 1.18 x 10^-10 M.To learn more about ions :
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What is li stand for in chemistry
FOCUS QUESTION
Why do elements in the same group have similar
properties?
Answer:
Elements of the the same group have similar number of valence electrons. They have identical number of electrons in their outermost shell. For example ; All the alkali metals in Group 1 have 1 valence electron.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.
54.5 mL of liquid gallium metal is poured into a graduated cylinder. The gallium filling the graduated cylinder weighs 10.686 g. From this information, calculate the density of the liquid gallium.
Answer:
The answer is 0.20 g/mLExplanation:
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
0.20 g/mLHope this helps you
A hose delivers water to a swimming pool that measures 9.0 m long by 3.5 m wide by 1.75 m
deep. It requires 97 hours to fill the pool. At what rate in liters/min (1/min) will the hose fill the
pool.
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......
a 40-g ice cube floats in 200 g of water in a 100-g copper cup; all are at a temperature of 0 0c. a piece of lead at 98 0c is dropped into the cup, and the final equilibrium temperature is 12 0c. what is the mass of lead?
Let the mass of lead be m. The heat lost by lead is equal to heat gained by water, copper cup and the ice cube.
So,m x 0.13 x (12 - 98) = (200 + 40) x 4.18 x (12 - 0) + 100 x 0.385 x (12 - 0) + 100 x 0.385 x (12 - 0)where, 0.13 and 0.385 are specific heat capacities of lead and copper respectively.
4.18 is the specific heat of water. By solving the above expression we get,m = 95.97 g. Therefore, the mass of the lead is 95.97 g.
So, we have found out that the mass of lead is 95.97 g.
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List the kinds of structures, similar to a business or factory, that a cell must have to operate successfully.
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.
The nucleus controls all the activities taking place in the cell and the synthesis of proteins.2. Power house = Mitochondrion.
The mitochondria provides all the energy required in the cell by transforming energy forms.3. Maintenance team = Lysosomes.
They are responsible for absorbing materials and breaking the materials taken in by the cells.4. Functional managers = Chromosomes.
They give sets of instructions for the synthesis of products.5. Assembly line workers = Ribosomes.
They are involved in the build up of proteins.6. Assembly line = Endoplasmic Reticulum.
This is where the ribosomes perform their tasks.7. Security and support = Cytoskeleton.
They help to maintain and support the shape of the cells.8. Drivers or messengers = Vesicles.
They ensure proteins are properly transported to the right and exact location.9. Packaging unit = Golgi apparatus.
Prepares the protein for export by chemically tagging them.10. Gate man/procurement unit = Cell membrane.
It is the wall of the cell and typically controls what leaves and enters the cell.Ammonia is made industrially by reacting nitrogen and hydrogen under pressure, at high temperature, and in the presence of a catalyst. The equation isN2(g) + 3H2(g) ------> 2NH3(g). If 4.0 mol of H2 react, how many moles of NH3 will be produced?
Answer:
From 4.0 moles of hydrogen 2.67 moles of ammonia are produced.
Explanation:
Given data:
Number of moles of hydrogen react = 4.0 mol
Number of moles of ammonia produced = ?
Solution:
Chemical equation:
N₂ + 3H₂ → 2NH₃
Now we will compare the moles of hydrogen and ammonia from balance chemical equation.
H₂ : NH₃
3 : 2
4 : 2/3×4 = 2.67 mol
From 4.0 moles of hydrogen 2.67 moles of ammonia are produced.
find the mass concentrtion for 10.0 g cacl2 in 250.0 g of solution
The mass concentration of CaCl2 in the solution is 4.00 g/mL.
To calculate the mass concentration of CaCl2 in the solution, use the following formula:
Mass Concentration = (Mass of solute) / (Volume of solution)
Given that the mass of CaCl2 is 10.0 g and the mass of the solution is 250.0 g, the mass concentration can be calculated as:
Mass Concentration = 10.0 g / 250.0 g = 0.04 g/g
The result can also be expressed as 4.00 g/mL since the units of mass concentration can be grams of solute per milliliter of solution.
Therefore, the mass concentration of CaCl2 in the solution is 4.00 g/mL.
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In the water cycle, clouds form as a result of _____?
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:
help i have the stupid
Answer:
B) From the car
Explanation:
The car is in motion
A. Water moving into the root cells of a plant
B. Oxygen moving into the bloodstream from
the lungs
C. Potassium ions moving in and out of an
animal cell
D. All of the above
Answer:
c
Explanation:
because it has potassium
5. What mass of water can be heated from 15.0°C to 40.0" with 925 Joules 2 points of heat?
Mass of water = 8.84 g
Further explanationHeat can be calculated using the formula:
Q = mc∆T
Q = heat, J
m = mass, g
c = specific heat, joules / g ° C
∆T = temperature difference, ° C / K
c of water = 4.182 J / g ° C
Q = 925 J
mass of water :
[tex]\tt Q=m.c.\Delta T\\\\925=m\times 4.182\times (40-15)\\\\m=8.84~g[/tex]
This sample is a gneissic marble. Note the foliation.
What mineral is the majority of this rock made from?
What other minerals, if any, can you see in this rock?
Are pure marbles (i.e. made completely from carbonate, with no impurities) commonly foliated? Why/Why not?
Is this rock igneous, metamorphic, or sedimentary?
The majority of this rock is made from the mineral calcite, which is a form of calcium carbonate (CaCO3). Other minerals- mica, such as biotite or muscovite, and possibly quartz. Rock is metamorphic.
Calcite is a common mineral found in marble and is responsible for its characteristic white or light-colored appearance. In addition to calcite, other minerals that can be seen in this rock include mica, such as biotite or muscovite, and possibly quartz. Mica minerals often form thin, platy layers within the rock, contributing to its foliated texture. Quartz may appear as small, transparent grains scattered throughout the rock. The presence of these minerals can vary depending on the specific composition and metamorphic history of the gneissic marble.
Marble is typically not foliated when it is pure and made entirely of carbonate minerals. Foliation is a characteristic feature of metamorphic rocks, where the rock's texture is layered or banded due to the alignment of mineral grains caused by directed pressure and heat during metamorphism. In pure marbles, the lack of impurities and the absence of directional pressure and heat result in a non-foliated texture, where the minerals are evenly distributed and lack preferred orientations.
Based on the given description of a gneissic marble with foliation, this rock is metamorphic in nature. Gneissic texture refers to the presence of alternating light and dark mineral bands or layers, indicating intense metamorphism and recrystallization of the original rock. Gneissic marble is a type of metamorphic rock that has undergone significant pressure and temperature changes, resulting in the development of a foliated texture and distinct mineral banding.
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What is the mass of 25 mL of rubbing
alcohol?
Answer:
the answer is 0.785g/ mL
