# CHM test 6

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Question 1
Question 1

In Gay-Lussac's law, the pressure of a gas increases due to an increase in temperature because

there is a decrease in the volume of the container.

the molecules strike the walls of the container less often.

the molecules strike the walls of the container more often.

the molecules get bigger.

there is an increase in the number of gas particles.

Question 2
Question 2

According to the kinetic theory of gases, a gas can be compressed much more than a liquid or solid
because

a gas is composed of very small particles.

gas particles move rapidly.

gas particles do not attract or repel one another.

the particles of a gas are very far apart.

gas particles move faster when the temperature increases.

Question 3
Question 3

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

1.50 mm Hg

7.5 mm Hg
760 mm Hg

507 mm Hg

1140 mm Hg

Question 4
Question 4

Complete the following statement: In Charles' law, the volume of a gas _____ when the _____ decreases.

increases, pressure

decreases, temperature

increases, temperature

decreases, pressure

increases, quantity of gas

Question 5
Question 5

A gas sample in a closed, expandable container of initial volume 5.00 L was allowed to warm from 25°C to
35°C. What was its new volume?

4.84 L

7.00 L

3.57 L

5.17 L

4380 L

Question 6
Question 6

the volume of a gas is inversely related to the number of moles at standard temperature and
pressure.
the volume of a gas is inversely related to the number of moles at constant temperature and
pressure.
the volume of a gas depends only on the number of moles in the sample.

the volume of a gas depends only on the temperature and pressure.

the volume of a gas is directly related to the number of moles at constant temperature and pressure.

Question 7
Question 7

A gas at 5.00 atm pressure was stored in a tank during the winter at 5.0°C. During the summer, the
temperature in the storage area reached 40.0°C. What was the pressure in the gas tank then?

5.63 atm

4.44 atm

0.625 atm

40.0 atm

69.5 atm

Question 8
Question 8
A sample of argon at 300.°C and 50.0 atm pressure is cooled in the same container to a temperature of
0.°C. What is the new pressure?

54.9 atm

45.5 atm

23.8 atm

105 atm

42.7 atm

Question 9
Question 9

A sample of nitrogen gas had a volume of 500. mL, a pressure in its closed container of 740 torr, and a
temperature of 25°C. What was the new volume of the gas when the temperature was changed to 50°C
and the new pressure was 760 torr?
450 mL

400 mL

970 mL

530 mL

240 mL

Question 10
Question 10

A cyclopropane-oxygen mixture is used as an anesthetic. If the partial pressure of cyclopropane in the
mixture is 330 mm Hg and the partial pressure of the oxygen is 1.0 atm, what is the total pressure of the
mixture in torr?

330 torr

1.4 torr

430 torr

1100 torr

760 torr

Question 11
Question 11

Which of the following is NOT a potential use for a hyperbaric chamber?

treatment for burns and infections

treating a diver with the bends

increasing the rate at which a broken bone heals

counteracting carbon monoxide poisoning

treating some cancers

Question 12
Question 12
A balloon is filled with helium gas. For the following question(s), select the letter of the balloon diagram that
corresponds to the given change in conditions.

The temperature is changed from 50°C to -150°C at constant pressure.

B

C

A

A and B

B and C

Question 13
Question 13

At 570. mm Hg and 25°C, a gas sample has a volume of 2270 mL. What is the final pressure (in mm Hg) at
a volume of 1250 mL and a temperature of 175°C?

690 mm Hg

7000 mm Hg

1560 mm Hg

470 mm Hg

210 mm Hg

Question 14
Question 14
At STP conditions, 11 g of SO2 have a volume of

3.8 L.

250 L.

0.0076 L.

22 L.

130 L.

Question 15
Question 15

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

17 L

5.6 L

30. L

130 L

11 L

uestion 16
Question 16

The temperature of a 500. mL sample of gas increases from 150. K to 350. K. What is the final volume of
the sample of gas, if the pressure in the container is kept constant?

1170 mL

110 mL

210 mL

0.0047 mL

0.0095 mL

Question 17
Question 17
The pressure exerted by a gas on its container is directly proportional to

the mass of the individual gas molecules.

the Fahrenheit temperature of the gas.

the centigrade temperature of the gas.

the number of molecules of gas in the sample.

the volume of the container.

Question 18
Question 18
The total pressure in a mixture of gases is equal to the partial pressure(s) of

the gas with the highest molecular weight.

the gas with the greatest number of moles.

the gas with the smallest number of moles.

the gas that occupies the largest volume.

Question 19
Question 19

A gas contained in a steel tank has a pressure of 1.5 atm at a temperature of 320 K. What will be the gas
pressure when the temperature changes to 450 K?

1.1 atm

1.5 atm

2.1 atm

0.47 atm

0.94 atm

Question 20
Question 20
Which of the following is NOT part of the kinetic theory of gases?

Gas particles do not attract or repel one another.

There is very little empty space in a gas.

A gas is composed of very small particles.

Gas particles move rapidly.

Gas particles move faster when the temperature increases.

Question 21
Question 21

Which of the following correctly describes the partial pressures of gases in the body?

high O2, high CO2, oxygenated blood

high O2, low CO2, deoxygenated blood

high O2, high CO2, tissue

high O2, low CO2, oxygenated blood

low O2, low CO2, deoxygenated blood

Question 22
Question 22

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

0.55 atm

1.5 atm

1.0 x 103 atm

2.1 atm

1600 atm

Question 23
Question 23
The pressure of 5.0 L of gas increases from 1.50 atm to 1240 mm Hg. What is the final volume of the gas,
assuming constant temperature?

5.0 L

0.0060 L

5.4 L

4100 L

4.6 L

Question 24
Question 24

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

760 mm Hg.

200 mm Hg.

600 mm Hg.

100 mm Hg.

1 mm Hg .

Question 25
Question 25

At STP, temperature and pressure have the values of

760 K and 273 atm.

273 K and 760 mm Hg.

0 K and 1 atm.

273 K and 1 mm Hg.

0 K and 760 mm Hg.

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 views: 134 posted: 9/21/2012 language: English pages: 9