Question 1

The unit of 1 atmosphere used to describe the pressure of a gas is equal to

Accepted Answer

A) 200 mmHg. 
B) 1 mmHg . 
C) 100 mmHg. 
D) 760 mmHg. 
E) 600 mmHg. 
A) 200 mmHg. 
B) 1 mmHg . 
C) 100 mmHg. 
D) 760 mmHg. 
E) 600 mmHg.

Question 2

As you rise higher in Earth's atmosphere, the atmospheric pressure

Accepted Answer

A) decreases. 
B) increases. 
C) remains the same. 
A) decreases. 
B) increases. 
C) remains the same.

Question 3

A sample of argon gas at   and  50.0  atm pressure is cooled in the same container to a temperature of     What is the new pressure, if volume and amount of gas do not change?

Accepted Answer

A)   105 atm 
B)   42.7 atm 
C)   45.5 atm 
D)   54.9 atm 
E)   23.8 atm 
A)   105 atm 
B)   42.7 atm 
C)   45.5 atm 
D)   54.9 atm 
E)   23.8 atm

Question 4

The total pressure in a mixture of gases is equal to the partial pressure(s)of

Accepted Answer

A) all the gases added together. 
B) the gas with the highest molecular weight. 
C) the gas with the smallest number of moles. 
D) the gas with the greatest number of moles. 
E) the gas that occupies the largest volume. 
A) all the gases added together. 
B) the gas with the highest molecular weight. 
C) the gas with the smallest number of moles. 
D) the gas with the greatest number of moles. 
E) the gas that occupies the largest volume.

Question 5

At constant temperature, a sample of helium at 760. torr in a closed container was compressed from 5.00 L to 3.00 L, with no change in amount of gas or temperature. What was the new pressure exerted by the helium on
Its container?

Accepted Answer

A) 15.0 torr 
B) 2280 torr 
C) 800. torr 
D) 3820 torr 
E) 1270 torr 
A) 15.0 torr 
B) 2280 torr 
C) 800. torr 
D) 3820 torr 
E) 1270 torr

Question 6

According to the kinetic theory of gases, particles of a gas

Accepted Answer

A) move slowly. 
B) are very large. 
C) decrease kinetic energy as temperature increases. 
D) are very far apart. 
E) lose their valence electrons. 
A) move slowly. 
B) are very large. 
C) decrease kinetic energy as temperature increases. 
D) are very far apart. 
E) lose their valence electrons.

Question 7

According to the kinetic molecular theory of gas behavior, particles of a gas tend to move ________ in ________.

Accepted Answer

A) rapidly; straight paths 
B) slowly; curve paths 
C) slowly; straight paths 
D) rapidly; curved paths 
A) rapidly; straight paths 
B) slowly; curve paths 
C) slowly; straight paths 
D) rapidly; curved paths

Question 8

A gas at  5.00  atm pressure was stored in a tank during the winter at   During the summer, the temperature in the storage area reached   What was the pressure in the gas tank then, if volume and amount of gas do not change?

Accepted Answer

A)   69.5 atm 
B)   5.63 atm 
C)   40.0 atm 
D)   0.625 atm 
E)   4.44 atm 
A)   69.5 atm 
B)   5.63 atm 
C)   40.0 atm 
D)   0.625 atm 
E)   4.44 atm

Question 9

Atmospheric pressure on a rainy day is usually ________ air pressure on a sunny day.

Accepted Answer

A) higher than 
B) lower than 
C) the same as 
A) higher than 
B) lower than 
C) the same as

Question 10

A tank contains helium gas at  490 mmHg , nitrogen gas at  0.75 atm, and neon at 520 torr. What is the total pressure in atm?

Accepted Answer

A)   0.55 atm 
B)    
C)   1.5 atm 
D)   2.1 atm 
E)   1600 atm 
A)   0.55 atm 
B)    
C)   1.5 atm 
D)   2.1 atm 
E)   1600 atm

Question 11

A gas sample contains 4.0 g of CH4 and 2.0 g of He. What is the volume of the sample at STP?

Accepted Answer

A) 130 L 
B) 17 L 
C) 5.6 L 
D) 30. L 
E) 11 L 
A) 130 L 
B) 17 L 
C) 5.6 L 
D) 30. L 
E) 11 L

Question 12

At STP, temperature and pressure have the values of

Accepted Answer

A) 0 K and 1 atm. 
B) 760 K and 273 atm. 
C) 0 K and 760 mmHg. 
D) 273 K and 1 mmHg. 
E) 273 K and 760 mmHg. 
A) 0 K and 1 atm. 
B) 760 K and 273 atm. 
C) 0 K and 760 mmHg. 
D) 273 K and 1 mmHg. 
E) 273 K and 760 mmHg.

Question 13

A 5.00-L tank contains helium gas at 1.50 atm. What is the pressure of the gas in mmHg?

Accepted Answer

A) 760. mmHg 
B) 7.50 mmHg 
C) 1.50 mmHg 
D) 507 mmHg 
E) 1140 mmHg 
A) 760. mmHg 
B) 7.50 mmHg 
C) 1.50 mmHg 
D) 507 mmHg 
E) 1140 mmHg

Question 14

Gay-Lussac's law is usually written as ________.

Accepted Answer

The answer of Gay-Lussac's law is usually written as ________....

Question 15

A sample of nitrogen gas had a volume of  500 .mL, a pressure in its closed container of 740 torr, and a temperature of   What was the new volume of the gas when the temperature was changed to   and the new pressure was 760 torr, if the amount of gas does not change?

Accepted Answer

A)   400 mL 
B)   240 mL 
C)   450 mL 
D)   970 mL 
E)   530 mL 
A)   400 mL 
B)   240 mL 
C)   450 mL 
D)   970 mL 
E)   530 mL

Question 16

A barometer is usually filled with ________.

Accepted Answer

The answer of A barometer is usually filled with ________....

Question 17

How many moles of neon occupy a volume of 14.3 L at STP?

Accepted Answer

A) 32.0 moles 
B) 6.45 moles 
C) 1.57 moles 
D) 36.7 moles 
E) 0.638 moles 
A) 32.0 moles 
B) 6.45 moles 
C) 1.57 moles 
D) 36.7 moles 
E) 0.638 moles

Question 18

According to Avogadro's law,

Accepted Answer

A) the volume of a gas depends only on the number of moles in the sample. 
B) the volume of a gas is directly related to the number of moles at constant temperature and pressure. 
C) the volume of a gas is inversely related to the number of moles at standard temperature and pressure. 
D) the volume of a gas is inversely related to the number of moles at constant temperature and pressure. 
E) the volume of a gas depends only on the temperature and pressure. 
A) the volume of a gas depends only on the number of moles in the sample. 
B) the volume of a gas is directly related to the number of moles at constant temperature and pressure. 
C) the volume of a gas is inversely related to the number of moles at standard temperature and pressure. 
D) the volume of a gas is inversely related to the number of moles at constant temperature and pressure. 
E) the volume of a gas depends only on the temperature and pressure.

Question 19

The volume of a gas with a pressure of 1.2 atm increases from 1.0 L to 4.0 L. What is the final pressure of the gas, assuming no change in amount of gas or temperature?

Accepted Answer

A) 0.30 atm 
B) 4.8 atm 
C) 1.0 atm 
D) 1.2 atm 
E) 3.3 atm 
A) 0.30 atm 
B) 4.8 atm 
C) 1.0 atm 
D) 1.2 atm 
E) 3.3 atm

Question 20

Which measurement describes the pressure of a gas?

Accepted Answer

A) 725 mmHg 
B) 1.2 g/L 
C) 2.5 L 
D) 0.45 moles 
E) 315 K 
A) 725 mmHg 
B) 1.2 g/L 
C) 2.5 L 
D) 0.45 moles 
E) 315 K

Exam 8: Gases

The unit of 1 atmosphere used to describe the pressure of a gas is equal to

As you rise higher in Earth's atmosphere, the atmospheric pressure

A sample of argon gas at and 50.0 atm pressure is cooled in the same container to a temperature of What is the new pressure, if volume and amount of gas do not change?

The total pressure in a mixture of gases is equal to the partial pressure(s)of

At constant temperature, a sample of helium at 760. torr in a closed container was compressed from 5.00 L to 3.00 L, with no change in amount of gas or temperature. What was the new pressure exerted by the helium on Its container?

According to the kinetic theory of gases, particles of a gas

According to the kinetic molecular theory of gas behavior, particles of a gas tend to move ________ in ________.

A gas at 5.00 atm pressure was stored in a tank during the winter at During the summer, the temperature in the storage area reached What was the pressure in the gas tank then, if volume and amount of gas do not change?

Atmospheric pressure on a rainy day is usually ________ air pressure on a sunny day.

A tank contains helium gas at 490 mmHg , nitrogen gas at 0.75 atm, and neon at 520 torr. What is the total pressure in atm?

A gas sample contains 4.0 g of CH4 and 2.0 g of He. What is the volume of the sample at STP?

At STP, temperature and pressure have the values of

A 5.00-L tank contains helium gas at 1.50 atm. What is the pressure of the gas in mmHg?

Gay-Lussac's law is usually written as ________.

A sample of nitrogen gas had a volume of 500 .mL, a pressure in its closed container of 740 torr, and a temperature of What was the new volume of the gas when the temperature was changed to and the new pressure was 760 torr, if the amount of gas does not change?

A barometer is usually filled with ________.

How many moles of neon occupy a volume of 14.3 L at STP?

According to Avogadro's law,

The volume of a gas with a pressure of 1.2 atm increases from 1.0 L to 4.0 L. What is the final pressure of the gas, assuming no change in amount of gas or temperature?

Which measurement describes the pressure of a gas?

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