Question 1

Three 1.0 L flasks filled with H2, O2 and He, respectively, are at STP. Which of the following statements concerning these gases is true?

Accepted Answer

A)   Each flask contains the same number of atoms.
B)   There are twice as many H2 and O2 molecules as there are He atoms.
C)   There are twice as many He atoms as there are H2 or O2 molecules.
D)   The number of H2 or O2 molecules is the same as the number of He atoms.

Question 2

The ideal gas equation cannot be written as ________.

Accepted Answer

A)   PV = nRT
B)   P = 
C)   R = 
D)   R =

Question 3

How would the pressure of a sealed container of gas be affected if its Kelvin temperature is halved while the moles and the volume of the gas remain constant?

Accepted Answer

A)   The pressure would be reduced to one half of the original pressure.
B)   The pressure would quadruple.
C)   The pressure would not be affected.
D)   The pressure would be reduced by a factor of 4.

Question 4

At standard conditions, one mole of any gas will occupy a volume of ________.

Accepted Answer

A)   1.00 liter
B)   22.41 mL
C)   22.41 L
D)   22,400 L

Question 5

Chlorine gas is widely used to purify municipal water supplies and to treat swimming pool waters. Suppose that the volume of a particular sample of Cl2 is 6.18 L at 0.884 atm and 46 °C, at what temperature (in °C) will the volume be 2.00 L if the pressure is 157 kPa?

Accepted Answer

T₂ = P₂V₂T₁/P₁V...

Question 6

An excimer laser contains 0.40 mole Ar and 0.60 mole F2. The total pressure inside the laser cavity is 1.10 atm. What is the partial pressure of Ar inside the laser?

Accepted Answer

A)   0.40 atm
B)   0.44 atm
C)   0.60 atm
D)   1.00 atm

Question 7

Which of the following statements best gives the kinetic molecular theory explanation of the Boyle's law observation of increased pressure due to decreased volume?

Accepted Answer

A)   Particles have more kinetic energy.
B)   Particles increase in size.
C)   Particles strike container walls with more force.
D)   Particles strike container walls more frequently.

Question 8

Charles' law involves which of the following?

Accepted Answer

A)   a varying temperature
B)   a constant volume
C)   a varying mass of gas
D)   an indirect proportion

Question 9

A sample of helium gas has a volume of 1.25 L at -125 °C and 5.00 atm. This gas is compressed at 50.0 atm to a volume of 325 mL. What is the final temperature of the helium gas in °C?

Accepted Answer

T₂ = P₂ V₂ T₁/P₁ V₁
= (50....

Question 10

What is the pressure, exerted by 1.00 x 1020 molecules of nitrogen in a 305 mL flask at
175 °C?

Accepted Answer

1.0 x 10²⁰mlc x 1 mol/6.02 x 10²³ ...

Question 11

The conditions known as STP are ________.

Accepted Answer

A)   760 atm and 273 K
B)   760 mm Hg and 273 °C
C)   1 atm and 273 K
D)   1 mm Hg and 273 K

Question 12

The pressure exerted by a gas collected by water displacement is obtained by subtracting the vapor pressure of H2O from the total pressure of the gas collected. This is an example of the application of ________.

Accepted Answer

A)   Avogadro's law
B)   Dalton's law
C)   Boyle's law
D)   Charles' law

Question 13

6.80 L of CH4 gas at 0.980 atm and 23 °C ________.

Accepted Answer

A)   contains 0.897 mol CH4
B)   has a mass of 3.13 g
C)   contains 6.02 x 1022 molecules CH4
D)   contains 6.61 x 1023 H atoms

Question 14

What volume of H2, in milliliters, at 21 °C and 0.998 atm can be produced from the reaction of 2.40 grams of Zn in excess HCl?
Zn(s)  + 2 HCl(aq)   →\rightarrow→  ZnCl2(aq)  + H2(g)

Accepted Answer

A)   890 mL
B)   675 mL
C)   3300 mL
D)   1200 mL

Question 15

According to the combined gas law, for a fixed amount of gas ________.

Accepted Answer

A)   volume and pressure are directly proportional
B)   volume and Kelvin temperature are inversely proportional
C)   Kelvin and pressure are directly proportional
D)   pressure and Kelvin temperature have no relationship to each other

Question 16

What volume is occupied by 6.21 x 1024 molecules of CO at STP?

Accepted Answer

A)   106 L
B)   230 L
C)   44.3 L
D)   231 L

Question 17

A sample of nitrogen gas occupies a volume of 8.65 L at a temperature of 295 K and a pressure of 0.985 atm. What is the pressure of the gas if the volume of the gas is increased to 12.1 L and the temperature is reduced to 284 K?

Accepted Answer

A)   1.08 atm
B)   0.875 atm
C)   0.678 atm
D)   1.39 atm

Question 18

What is the partial pressure of N2 in a mixture of 0.36 mole N2, 0.15 mole Ne, and 0.75 mole of O2 that has a total pressure of 3.18 atm?

Accepted Answer

A)   0.29 atm
B)   0.36 atm
C)   0.65 atm
D)   0.91 atm

Exam 12: Gas Laws

What volume of H₂, in milliliters, at 21 °C and 0.998 atm can be produced from the reaction of 2.40 grams of Zn in excess HCl? Zn(s) + 2 HCl(aq) $\rightarrow$ ZnCl₂(aq) + H₂(g)

Correct Answer
verified

Charles' law involves which of the following?

Correct Answer
verified

A sample of helium gas has a volume of 1.25 L at -125 °C and 5.00 atm. This gas is compressed at 50.0 atm to a volume of 325 mL. What is the final temperature of the helium gas in °C?

Correct Answer
verified
T₂ = P₂ V₂ T₁/P₁ V₁
= (50....
View Answer

At standard conditions, one mole of any gas will occupy a volume of ________.

Correct Answer
verified

The pressure exerted by a gas collected by water displacement is obtained by subtracting the vapor pressure of H₂O from the total pressure of the gas collected. This is an example of the application of ________.

Correct Answer
verified

What is the partial pressure of N₂ in a mixture of 0.36 mole N₂, 0.15 mole Ne, and 0.75 mole of O₂ that has a total pressure of 3.18 atm?

Correct Answer
verified

Which of the following statements best gives the kinetic molecular theory explanation of the Boyle's law observation of increased pressure due to decreased volume?

Correct Answer
verified

According to the combined gas law, for a fixed amount of gas ________.

Correct Answer
verified

Three 1.0 L flasks filled with H₂, O₂ and He, respectively, are at STP. Which of the following statements concerning these gases is true?

Correct Answer
verified

The conditions known as STP are ________.

Correct Answer
verified

6.80 L of CH₄ gas at 0.980 atm and 23 °C ________.

Correct Answer
verified

An excimer laser contains 0.40 mole Ar and 0.60 mole F₂. The total pressure inside the laser cavity is 1.10 atm. What is the partial pressure of Ar inside the laser?

Correct Answer
verified

What volume is occupied by 6.21 x 10²⁴ molecules of CO at STP?

Correct Answer
verified

Chlorine gas is widely used to purify municipal water supplies and to treat swimming pool waters. Suppose that the volume of a particular sample of Cl₂ is 6.18 L at 0.884 atm and 46 °C, at what temperature (in °C) will the volume be 2.00 L if the pressure is 157 kPa?

Correct Answer
verified
T₂ = P₂V₂T₁/P₁V...
View Answer

The ideal gas equation cannot be written as ________.

Correct Answer
verified

How would the pressure of a sealed container of gas be affected if its Kelvin temperature is halved while the moles and the volume of the gas remain constant?

Correct Answer
verified

What is the pressure, exerted by 1.00 x 10²⁰ molecules of nitrogen in a 305 mL flask at 175 °C?

Correct Answer
verified
1.0 x 10²⁰mlc x 1 mol/6.02 x 10²³ ...
View Answer

A sample of nitrogen gas occupies a volume of 8.65 L at a temperature of 295 K and a pressure of 0.985 atm. What is the pressure of the gas if the volume of the gas is increased to 12.1 L and the temperature is reduced to 284 K?

Correct Answer
verified

Exam 12: Gas Laws

What volume of H2, in milliliters, at 21 °C and 0.998 atm can be produced from the reaction of 2.40 grams of Zn in excess HCl? Zn(s) + 2 HCl(aq) →\rightarrow→ ZnCl2(aq) + H2(g)

Correct AnswerverifiedShow Answer

Charles' law involves which of the following?

Correct AnswerverifiedShow Answer

A sample of helium gas has a volume of 1.25 L at -125 °C and 5.00 atm. This gas is compressed at 50.0 atm to a volume of 325 mL. What is the final temperature of the helium gas in °C?

Correct AnswerverifiedT2 = P2 V2 T1/P1 V1= (50....View AnswerShow Answer

At standard conditions, one mole of any gas will occupy a volume of ________.

Correct AnswerverifiedShow Answer

The pressure exerted by a gas collected by water displacement is obtained by subtracting the vapor pressure of H2O from the total pressure of the gas collected. This is an example of the application of ________.

Correct AnswerverifiedShow Answer

What is the partial pressure of N2 in a mixture of 0.36 mole N2, 0.15 mole Ne, and 0.75 mole of O2 that has a total pressure of 3.18 atm?

Correct AnswerverifiedShow Answer

Which of the following statements best gives the kinetic molecular theory explanation of the Boyle's law observation of increased pressure due to decreased volume?

Correct AnswerverifiedShow Answer

According to the combined gas law, for a fixed amount of gas ________.

Correct AnswerverifiedShow Answer

Three 1.0 L flasks filled with H2, O2 and He, respectively, are at STP. Which of the following statements concerning these gases is true?

Correct AnswerverifiedShow Answer

The conditions known as STP are ________.

Correct AnswerverifiedShow Answer

6.80 L of CH4 gas at 0.980 atm and 23 °C ________.

Correct AnswerverifiedShow Answer

An excimer laser contains 0.40 mole Ar and 0.60 mole F2. The total pressure inside the laser cavity is 1.10 atm. What is the partial pressure of Ar inside the laser?

Correct AnswerverifiedShow Answer

What volume is occupied by 6.21 x 1024 molecules of CO at STP?

Correct AnswerverifiedShow Answer

Chlorine gas is widely used to purify municipal water supplies and to treat swimming pool waters. Suppose that the volume of a particular sample of Cl2 is 6.18 L at 0.884 atm and 46 °C, at what temperature (in °C) will the volume be 2.00 L if the pressure is 157 kPa?

Correct AnswerverifiedT2 = P2V2T1/P1V...View AnswerShow Answer

The ideal gas equation cannot be written as ________.

Correct AnswerverifiedShow Answer

How would the pressure of a sealed container of gas be affected if its Kelvin temperature is halved while the moles and the volume of the gas remain constant?

Correct AnswerverifiedShow Answer

What is the pressure, exerted by 1.00 x 1020 molecules of nitrogen in a 305 mL flask at 175 °C?

Correct Answerverified1.0 x 1020 mlc x 1 mol/6.02 x 1023 ...View AnswerShow Answer

A sample of nitrogen gas occupies a volume of 8.65 L at a temperature of 295 K and a pressure of 0.985 atm. What is the pressure of the gas if the volume of the gas is increased to 12.1 L and the temperature is reduced to 284 K?

Correct AnswerverifiedShow Answer

What volume of H₂, in milliliters, at 21 °C and 0.998 atm can be produced from the reaction of 2.40 grams of Zn in excess HCl? Zn(s) + 2 HCl(aq) $\rightarrow$ ZnCl₂(aq) + H₂(g)

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
T₂ = P₂ V₂ T₁/P₁ V₁
= (50....
View Answer

Correct Answer
verified

The pressure exerted by a gas collected by water displacement is obtained by subtracting the vapor pressure of H₂O from the total pressure of the gas collected. This is an example of the application of ________.

Correct Answer
verified

What is the partial pressure of N₂ in a mixture of 0.36 mole N₂, 0.15 mole Ne, and 0.75 mole of O₂ that has a total pressure of 3.18 atm?

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Three 1.0 L flasks filled with H₂, O₂ and He, respectively, are at STP. Which of the following statements concerning these gases is true?

Correct Answer
verified

Correct Answer
verified

6.80 L of CH₄ gas at 0.980 atm and 23 °C ________.

Correct Answer
verified

An excimer laser contains 0.40 mole Ar and 0.60 mole F₂. The total pressure inside the laser cavity is 1.10 atm. What is the partial pressure of Ar inside the laser?

Correct Answer
verified

What volume is occupied by 6.21 x 10²⁴ molecules of CO at STP?

Correct Answer
verified

Chlorine gas is widely used to purify municipal water supplies and to treat swimming pool waters. Suppose that the volume of a particular sample of Cl₂ is 6.18 L at 0.884 atm and 46 °C, at what temperature (in °C) will the volume be 2.00 L if the pressure is 157 kPa?

Correct Answer
verified
T₂ = P₂V₂T₁/P₁V...
View Answer

Correct Answer
verified

Correct Answer
verified

What is the pressure, exerted by 1.00 x 10²⁰ molecules of nitrogen in a 305 mL flask at 175 °C?

Correct Answer
verified
1.0 x 10²⁰mlc x 1 mol/6.02 x 10²³ ...
View Answer

Correct Answer
verified