Question 1

"The total pressure in a mixture of unreacting gases is equal to the sum of the partial pressures of the individual gases" is a statement of __________________ Law.

Accepted Answer

A)   Charles's
B)   Graham's
C)   Boyle's
D)   Avogadro's
E)   Dalton'sF) A) and C)
G) C) and D)

Question 2

For a gas obeying Boyle's Law, a plot of V versus 1/P will give a straight line passing through the origin.

Accepted Answer

A) True 
 B)False

Question 3

Which of the following gases will be the slowest to diffuse through a room?

Accepted Answer

A)   methane, CH4
B)   hydrogen sulfide, H2S
C)   carbon dioxide, CO2
D)   water, H2O
E)   neon, NeF) A) and B)
G) A) and C)

Question 4

According to the postulates of kinetic-molecular theory, the molecules of all gases at a given temperature have the same average kinetic energy.

Accepted Answer

A) True 
 B)False

Question 5

Mercury is 13.6 times as dense as liquid water. What would be the reading of a water-filled barometer at normal atmospheric pressure, 760. mmHg?

Accepted Answer

A)   1.03 × 103 torr
B)   1.03 × 103 Pa
C)   1.03 × 103 mm height of water column
D)   1.03 × 103 cm height of water column
E)   13.6 atmF) B) and C)
G) C) and E)

Question 6

State Amontons's Law and illustrate it with a graph, using standard x-y coordinate axes. Be sure to label the axes unambiguously with the correct gas variables.

Accepted Answer

At constant volume, the pressure of a fi...

Question 7

A compressed gas cylinder containing 1.50 mol methane has a volume of 3.30 L. What pressure does the methane exert on the walls of the cylinder if its temperature is 25°C?

Accepted Answer

A)   9.00 × 10-2 atm
B)   0.933 atm
C)   1.11 atm
D)   1.70 atm
E)   11.1 atmF) A) and E)
G) D) and E)

Question 8

If the molecular mass of a gas increases by a factor of 4 at constant temperature, its rms speed will

Accepted Answer

A)   decrease by a factor of 4.
B)   increase by a factor of 4.
C)   decrease by a factor of 16.
D)   increase by a factor of 16.
E)   decrease by a factor of 2.F) None of the above
G) A) and B)

Question 9

The pressure of sulfur dioxide in a container is 159 kPa. What is this pressure in atmospheres?

Accepted Answer

A)   0.209 atm
B)   0.637 atm
C)   1.57 atm
D)   21.2 atm
E)   15900 atmF) A) and B)
G) All of the above

Question 10

Which of the following gases effuses most rapidly?

Accepted Answer

A)   nitrogen
B)   oxygen
C)   hydrogen chloride
D)   ammonia
E)   carbon monoxideF) C) and D)
G) B) and D)

Question 11

When a closed-ended manometer is used for pressure measurements, and the closed end is under vacuum, the level of manometer liquid in the closed arm can never be lower than that in the other arm.

Accepted Answer

A) True 
 B)False

Question 12

Small quantities of hydrogen can be prepared by the addition of hydrochloric acid to zinc. A sample of 195 mL of hydrogen was collected over water at 25°C and 753 torr. What mass of hydrogen was collected? (Pwater = 24 torr at 25°C)

Accepted Answer

A)   0.00765 g
B)   0.0154 g
C)   0.0159 g
D)   0.0164 g
E)   0.159 gF) C) and E)
G) A) and E)

Question 13

For a gas obeying Charles's Law, a plot of V versus 1/T will give a straight line passing through the origin.

Accepted Answer

A) True 
 B)False

Question 14

According to the postulates of kinetic-molecular theory, the average kinetic energy of gas molecules is proportional to the absolute temperature.

Accepted Answer

A) True 
 B)False

Question 15

Ima Chemist found the density of Freon-11 (CFCl3)  to be 5.58 g/L under her experimental conditions. Her measurements showed that the density of an unknown gas was 4.38 g/L under the same conditions. What is the molar mass of the unknown?

Accepted Answer

A)   96.7 g/mol
B)   108 g/mol
C)   127 g/mol
D)   165 g/mol
E)   175 g/molF) A) and D)
G) B) and E)

Exam 5: Gases and the Kinetic-Molecular Theory

"The total pressure in a mixture of unreacting gases is equal to the sum of the partial pressures of the individual gases" is a statement of __________________ Law.

Correct Answer
verified

According to the postulates of kinetic-molecular theory, the molecules of all gases at a given temperature have the same average kinetic energy.

Correct Answer
verified

When a closed-ended manometer is used for pressure measurements, and the closed end is under vacuum, the level of manometer liquid in the closed arm can never be lower than that in the other arm.

Correct Answer
verified

The pressure of sulfur dioxide in a container is 159 kPa. What is this pressure in atmospheres?

Correct Answer
verified

Mercury is 13.6 times as dense as liquid water. What would be the reading of a water-filled barometer at normal atmospheric pressure, 760. mmHg?

Correct Answer
verified

If the molecular mass of a gas increases by a factor of 4 at constant temperature, its rms speed will

Correct Answer
verified

Which of the following gases effuses most rapidly?

Correct Answer
verified

State Amontons's Law and illustrate it with a graph, using standard x-y coordinate axes. Be sure to label the axes unambiguously with the correct gas variables.

Correct Answer
verified
At constant volume, the pressure of a fi...
View Answer

For a gas obeying Charles's Law, a plot of V versus 1/T will give a straight line passing through the origin.

Correct Answer
verified

Ima Chemist found the density of Freon-11 (CFCl₃) to be 5.58 g/L under her experimental conditions. Her measurements showed that the density of an unknown gas was 4.38 g/L under the same conditions. What is the molar mass of the unknown?

Correct Answer
verified

According to the postulates of kinetic-molecular theory, the average kinetic energy of gas molecules is proportional to the absolute temperature.

Correct Answer
verified

Small quantities of hydrogen can be prepared by the addition of hydrochloric acid to zinc. A sample of 195 mL of hydrogen was collected over water at 25°C and 753 torr. What mass of hydrogen was collected? (P_water = 24 torr at 25°C)

Correct Answer
verified

For a gas obeying Boyle's Law, a plot of V versus 1/P will give a straight line passing through the origin.

Correct Answer
verified

A compressed gas cylinder containing 1.50 mol methane has a volume of 3.30 L. What pressure does the methane exert on the walls of the cylinder if its temperature is 25°C?

Correct Answer
verified

Which of the following gases will be the slowest to diffuse through a room?

Correct Answer
verified

Exam 5: Gases and the Kinetic-Molecular Theory

"The total pressure in a mixture of unreacting gases is equal to the sum of the partial pressures of the individual gases" is a statement of __________________ Law.

Correct AnswerverifiedShow Answer

According to the postulates of kinetic-molecular theory, the molecules of all gases at a given temperature have the same average kinetic energy.

Correct AnswerverifiedShow Answer

When a closed-ended manometer is used for pressure measurements, and the closed end is under vacuum, the level of manometer liquid in the closed arm can never be lower than that in the other arm.

Correct AnswerverifiedShow Answer

The pressure of sulfur dioxide in a container is 159 kPa. What is this pressure in atmospheres?

Correct AnswerverifiedShow Answer

Mercury is 13.6 times as dense as liquid water. What would be the reading of a water-filled barometer at normal atmospheric pressure, 760. mmHg?

Correct AnswerverifiedShow Answer

If the molecular mass of a gas increases by a factor of 4 at constant temperature, its rms speed will

Correct AnswerverifiedShow Answer

Which of the following gases effuses most rapidly?

Correct AnswerverifiedShow Answer

State Amontons's Law and illustrate it with a graph, using standard x-y coordinate axes. Be sure to label the axes unambiguously with the correct gas variables.

Correct AnswerverifiedAt constant volume, the pressure of a fi...View AnswerShow Answer

For a gas obeying Charles's Law, a plot of V versus 1/T will give a straight line passing through the origin.

Correct AnswerverifiedShow Answer

Ima Chemist found the density of Freon-11 (CFCl3) to be 5.58 g/L under her experimental conditions. Her measurements showed that the density of an unknown gas was 4.38 g/L under the same conditions. What is the molar mass of the unknown?

Correct AnswerverifiedShow Answer

According to the postulates of kinetic-molecular theory, the average kinetic energy of gas molecules is proportional to the absolute temperature.

Correct AnswerverifiedShow Answer

Small quantities of hydrogen can be prepared by the addition of hydrochloric acid to zinc. A sample of 195 mL of hydrogen was collected over water at 25°C and 753 torr. What mass of hydrogen was collected? (Pwater = 24 torr at 25°C)

Correct AnswerverifiedShow Answer

For a gas obeying Boyle's Law, a plot of V versus 1/P will give a straight line passing through the origin.

Correct AnswerverifiedShow Answer

A compressed gas cylinder containing 1.50 mol methane has a volume of 3.30 L. What pressure does the methane exert on the walls of the cylinder if its temperature is 25°C?

Correct AnswerverifiedShow Answer

Which of the following gases will be the slowest to diffuse through a room?

Correct AnswerverifiedShow Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
At constant volume, the pressure of a fi...
View Answer

Correct Answer
verified

Ima Chemist found the density of Freon-11 (CFCl₃) to be 5.58 g/L under her experimental conditions. Her measurements showed that the density of an unknown gas was 4.38 g/L under the same conditions. What is the molar mass of the unknown?

Correct Answer
verified

Correct Answer
verified

Small quantities of hydrogen can be prepared by the addition of hydrochloric acid to zinc. A sample of 195 mL of hydrogen was collected over water at 25°C and 753 torr. What mass of hydrogen was collected? (P_water = 24 torr at 25°C)

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified