Deck 8: Gases

Question 1

The volume of a gas with an initial pressure of 380 mmHg atm increases from 5.0 L to 8.0 L. What is the final pressure of the gas, in atm, assuming no change in amount of gas or temperature?

A)2.4 atm
B)0.31 atm
C)240 atm
D)8.0 atm
E)0.80 atm

Answer 1

0.31 atm

Question 2

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

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

Answer 2

lower than

Question 3

The atmospheric pressure in Denver, CO is 633 mmHg. What is this pressure in atm?

A)1.00 atm
B)633 atm
C)127 atm
D)1.20 atm
E)0.833 atm

Answer 3

0.833 atm

Question 4

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

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 5

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

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

Question 6

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

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

Question 7

In the kinetic molecular theory of gas behavior, the assumption is made that gas molecules

A)are close together in their container.
B)move with a kinetic energy equal to their Celsius temperature.
C)move rapidly in random directions.
D)are attracted to each other by strong forces.
E)occasionally come to rest.

Question 8

The pressure of 5.0 L of gas increases from 1.50 atm to 1240 mmHg. What is the final volume of the gas, assuming no change in amount of gas or temperature?

A)4.6 L
B)5.4 L
C)0.0060 L
D)5.0 L
E)4100 L

Question 9

Which of the following correctly describes the process of inspiration (air entering the lungs)?

A)The lungs contract, causing their internal pressure to decrease.
B)The lungs expand, causing their internal pressure to decrease.
C)There is no change in the internal pressure in the lungs.
D)The lungs contract, causing their internal pressure to increase.
E)The lungs expand, causing their internal pressure to increase.

Question 10

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?

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

Question 11

In a gas, the distance between the particles is

A)very close relative to the size of the molecules.
B)fixed relative to the size of the molecules.
C)very large relative to the size of the molecules.
D)close relative to the size of the molecules.
E)small relative to the size of the molecules.

Question 12

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?

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

Question 13

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

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

Question 14

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

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

Question 15

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

A)gas particles do not attract or repel one another.
B)a gas is composed of very small particles.
C)gas particles move faster when the temperature increases.
D)the particles of a gas are very far apart.
E)gas particles move rapidly.

Question 16

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

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

Question 17

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

A)Gas particles move rapidly.
B)There is very little empty space in a gas.
C)Gas particles do not attract or repel one another.
D)A gas is composed of very small particles.
E)Gas particles move faster when the temperature increases.

Question 18

The force of the collisions of gas particles against the walls of a container is called

A)quantity of gas.
B)temperature.
C)volume.
D)density.
E)pressure.

Question 19

Which measurement describes the pressure of a gas?

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

Question 20

According to Boyle's Law, the pressure of a gas increases as the volume decreases because

A)the gas particles strike the walls of the container with more force.
B)the kinetic energy of the gas particles increases.
C)the temperature of the gas increases.
D)the gas particles strike the walls of the container more often.
E)the gas particles get bigger.

Question 21

Complete the following statement: According to Charles's Law, the volume of a gas ________ when the ________ decreases.

A)increases; temperature
B)increases; quantity of gas
C)decreases; temperature
D)decreases; pressure
E)increases; pressure

Question 22

Vapor pressure can be described as

A)the pressure exerted by a gas above the surface of its liquid.
B)the pressure within the lungs during inhalation.
C)the pressure exerted on the Earth by the particles in the air.
D)the temperature at which the vapor pressure of a liquid equals atmospheric pressure.
E)the temperature at which bubbles of vapor appear in a liquid.

Question 23

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

A)A
B)B
C)C
D)A and B
E)B and C

Question 24

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?

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

Question 25

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, at constant amount of gas and volume?

A)1.1 atm
B)0.94 atm
C)1.5 atm
D)0.47 atm
E)2.1 atm

Question 26

An autoclave is used to sterilize surgical equipment because

A) it allows water to boil at temperatures above
B) it allows water to boil at at pressures greater than 1 atm.
C) it provides very high temperatures and very low pressures.
D) it allows water to boil at at pressures less than 1 atm.
E) it allows water to boil at temperatures less than

Question 27

A gas sample in a closed, expandable container of initial volume 5.00 L was allowed to warm from at constant amount of gas and pressure. What was its new volume?

A) 4380 L
B) 7.00 L
C) 3.57 L
D) 4.84 L
E) 5.17 L

Question 28

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

A)the molecules strike the walls of the container more often and with more force.
B)there is an increase in the number of gas particles.
C)there is a decrease in the volume of the container.
D)the molecules strike the walls of the container less often and with less force.
E)the molecules get bigger.

Question 29

When the combined gas law is rearranged to solve for the following is the correct expression:

A)
B)
C)
D)
E)

Question 30

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?

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

Question 31

A balloon is filled with helium gas. For the question(s)that follow, select the letter of the balloon diagram that corresponds to the given
change in conditions.
The balloon is put into a chamber whose pressure is less than the atmospheric pressure and at atmospheric temperature.

A)A
B)B
C)C
D)A and B
E)B and C

Question 32

The temperature of a 350 mL sample of gas increases from
What is the final volume of the sample of gas, if the pressure and amount of gas in the container is kept constant?

A) 41.6 mL
B) 2940 mL
C) 583 mL
D) 110. mL
E) 210 .mL

Question 33

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 and amount of gas in the container is kept constant?

A)0.0095 mL
B)0.0470 mL
C)1170 mL
D)210. mL
E)110. mL

Question 34

A sample of helium gas at and 3.60 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?

A) 5.40 atm
B) 2.40 atm
C) 2.38 atm
D) 3.12 atm
E) 4.15 atm

Question 35

The volume of a sample of gas, initially at and 158mL, increases to 450 mL. What is the final temperature of the sample of gas, if the pressure and amount of gas in the container is kept constant?

A)
B)
C)
D)
E)

Question 36

At 570. mm Hg and a gas sample has a volume of 2270 mL. What is the final pressure (in mmHg) at a volume of 1250 mL and a temperature of if the amount of gas does not change?

A) 690. mmHg
B) 1560 mmHg
C) 700 . mmHg
D) 470 . mmHg
E) 210. mmHg

Question 37

As the temperature of a gas increases, the density of the gas will

A)increase.
B)decrease.
C)remain constant.

Question 38

A diver exhales a bubble with a volume of 250 mL at a pressure of 2.4 atm and a temperature of What is the volume of the bubble when it reaches the surface where the pressure is 1.0 atm and the temperature is if the amount of gas does not change?

A) 110 mL
B) 100 mL
C) 1100 mL
D) 580 mL
E) 630 mL

Question 39

What unit of temperature is used in gas law calculations?

A)either kelvin or degree Celsius
B)either degree Celsius or degree Fahrenheit
C)degree Celsius
D)degree Fahrenheit
E)kelvin

Question 40

The boiling point of water at sea level is
At higher altitudes, the boiling point of water will be

A) higher, because the altitude is greater.
B) the same, because water always boils at
C) lower, because the atmospheric pressure is lower.
D) higher, because there are fewer water molecules in the air.
E) lower, because temperatures are lower.

Question 41

According to Avogadro's law,

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 42

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

Question 43

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

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 44

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

A)counteracting carbon monoxide poisoning
B)treating a diver with the bends
C)treating some cancers
D)treatment for burns and infections
E)increasing the rate at which a broken bone heals

Question 45

At STP, what is the volume of 1.00 mole of carbon dioxide?

A)22.4 L
B)44.0 L
C)1.00 L
D)273 L
E)12.2 L

Question 46

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

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

Question 47

At STP, how many moles of helium gas would occupy 1.00 L?

A)224 moles
B)2.24 moles
C)0.0446 moles
D)0.446 moles
E)22.4 moles

Question 48

When 25.0 g of Zn reacts, how many L of H₂ gas are formed at STP?

A)0.382 L
B)22.4 L
C)0.0171 L
D)8.56 L
E)4.28 L

Question 49

What is the pressure, in mmHg, of a 4.00 g sample of gas, which has a temperature of and a volume of 3.00 L?

A) 78.0 mmHg
B) 0.788 mmHg
C) 7880 mmHg
D) 1.04 mmHg
E) 788 mmHg

Question 50

The volume occupied by a gas is directly proportional to

A)the pressure of the gas.
B)the number of moles of gas in the sample.
C)the Fahrenheit temperature of the gas.
D)the Celsius temperature of the gas.
E)the mass of the individual gas molecules.

Question 51

When 25.0 g of Zn reacts, how many L of gas are formed at and a pressure of 854 mmHg?

A)22.4 L
B)8.32 L
C)0.120 L
D)0.382 L
E)8.56 L

Question 52

What is the mass of neon that exerts a pressure of 720. mmHg, with a temperature of -15.0 °C , when the volume of the container is 760. mL?

A)0.0340 g
B)0.615 g
C)0.686 g
D)517 g
E)25.8 g

Question 53

At STP, temperature and pressure have the values of

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 54

What volume would a 0.250 mole sample of gas occupy, if it had a pressure of 1.70 atm, and a temperature of

A) 3.72 L
B) 283 L
C) 0.423 L
D) 0.269 L
E) 1.25 L

Question 55

What is the mass of a sample of O₂ gas, which has a pressure of 740. mmHg, at a temperature of 25 °C, in a volume of 250. mL?

A)320. g
B)292 g
C)0.318 g
D)201 g
E)3.82 g

Question 56

At STP, what is the mass of 11.2 liters of O₂ gas?

A)32.0 g
B)128 g
C)16.0 g
D)64.0 g
E)8.00 g

Question 57

The mathematical expression of the ideal gas law is

A)
B)
C)
D)
E)

Question 58

At STP, 11 g of has a volume of

A) 3.8 L .
B) 130 L.
C) 22 L.
D) 0.0076 L.
E) 250 L.

Question 59

At STP, what is the volume of 4.50 moles of nitrogen gas?

A)3420 L
B)1230 L
C)60.7 L
D)101 L
E)167 L

Question 60

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

A)1.4 torr
B)760 torr
C)430 torr
D)1100 torr
E)330 torr

Question 61

Boyle's law is usually written as ________.

Question 62

In the kinetic molecular theory of gas behavior, the distance between gas molecules is assumed to be ________ the diameter of the gas molecules.

A)approximately the same as
B)22.4 times
C)large relative to
D)dependent on
E)small relative to

Question 63

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

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

Question 64

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

Question 65

A barometer is a device for measuring ________.

A)atmospheric pressure
B)blood pressure
C)vapor pressure
D)gas pressure in a container
E)gas pressure in the lung

Question 66

The relationship is called

A) Boyle's Law
B) Charles's Law
C) Gay-Lussac's Law
D) The Combined Gas Law
E) Avogadro's Law

Question 67

The relationship is called

A) Boyle's Law
B) Charles's Law
C) Gay-Lussac's Law
D) The Combined Gas Law
E) Avogadro's Law

Question 68

If atmospheric pressure on a certain day is 749 mmHg, what is the partial pressure of nitrogen, given that nitrogen is about 78% of the atmosphere?

A)760 mmHg
B)170 mmHg
C)600 mmHg
D)750 mmHg
E)580 mmHg

Question 69

Oxygen makes up about ________ percent of the atmosphere.

Question 70

Nitrogen makes up about ________ percent of the atmosphere.

Question 71

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

Question 72

The pressure exerted by the particles of vapor above a liquid is called the ________.

A)molar pressure
B)atmospheric pressure
C)barometric pressure
D)standard pressure
E)vapor pressure

Question 73

One atmosphere is the same as ________ mmHg.

Question 74

A tank contains a mixture of helium, neon, and argon gases. If the total pressure in the tank is 490. mmHg and the partial pressures of helium and argon are 215 mmHg and 102 mmHg, respectively, what is the
Partial pressure of neon?

A)377 mmHg
B)173 mmHg
C)603 mmHg
D)0.228 mmHg
E)807 mmHg

Question 75

In a gas mixture, the partial pressures are: 76.0 torr, He 230 mmHg , and 0.640 atm. The total pressure in mmHg is

A) 792 mmHg
B) 306 mmHg
C) 760 mmHg
D) 562 mmHg
E) 486 mmHg

Question 76

A barometer is usually filled with ________.

Question 77

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

A)
B)
C)
D)
E)

Question 78

Charles's law is usually written as ________.

Question 79

The relationship is called

A) Boyle's Law
B) Charles's Law
C) Gay-Lussac's Law
D) The Combined Gas Law
E) Avogadro's Law

Question 80

The pressure unit 1 mmHg is the same pressure unit as the pressure unit ________.