Deck 8: Gases

Question 1

According to the kinetic molecular theory of gases,particles of a gas ________.

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

Answer 1

are very far apart

Question 2

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

A)1.50 mmHg
B)507 mmHg
C)760 mmHg
D)1140 mmHg
E)3800 mmHg

Answer 2

1140 mmHg

Question 3

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 constant temperature and amount of gas?

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

Answer 3

4.6 L

Question 4

What temperature scale is used in gas law calculations?

A)Fahrenheit
B)Celsius
C)Kelvin
D)either Celsius or Fahrenheit
E)either Celsius or Kelvin

Question 5

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

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

Question 6

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

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

Question 7

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

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

Question 8

In the kinetic molecular theory of gas behavior,particles of a gas tend to move ________ and collisions between them are ________.

A)rapidly,rare
B)slowly,rare
C)rapidly,elastic
D)slowly,elastic
E)slowly,unusual

Question 9

The gas with an initial volume of 24.0 L at a pressure of 565 torr is compressed until the volume is 16.0 L.What is the final pressure of the gas,assuming the temperature and amount of gas does not change?

A)377 torr
B)760 torr
C)848 torr
D)500.torr
E)465 torr

Question 10

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,assuming the pressure and amount of gas do not change?

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

Question 11

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 constant temperature and amount of gas?

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

Question 12

At constant temperature,a sample of helium at 760.torr in a closed container was compressed from 5.00 L to 3.00 L.What was the new pressure exerted by the helium on its container?

A)800.torr
B)2280 torr
C)15.0 torr
D)3800 torr
E)1270 torr

Question 13

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

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

Question 14

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

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

Question 15

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

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

Question 16

In response to Boyle's law,the pressure of a gas increases as the volume decreases because ________.

A)the gas particles get bigger
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 with more force
E)the gas particles strike the walls of the container more often

Question 17

Which of the following is not part of the kinetic molecular theory of gases?

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

Question 18

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 balloon is put into a chamber where the pressure is less than the atmospheric pressure.

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

Question 19

Which measurement describes the pressure of a gas?

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

Question 20

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.

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

Question 21

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

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

Question 22

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,if the volume and amount of gas do not change?

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

Question 23

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

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

Question 24

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

Question 25

At STP conditions,11 g of SO₂ have a volume of ________.

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

Question 26

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)210 mL
B)1170 mL
C)0.00950 mL
D)0.00474 mL
E)110 mL

Question 27

A gas sample containing 12 g of CH₄ has a volume of 14 L.What will the volume be if 12 g of He is added? (Temperature and pressure do not change.)

A)22.4.L
B)53 L
C)56 L
D)70 L
E)3.5 L

Question 28

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,if the amount of gas does not change?

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

Question 29

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,if the volume and amount of gas do not change?

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

Question 30

A temperature of 125 °C is the same as ________.

A)-148 K
B)398 K
C)257 K
D)530.K
E)273 K

Question 31

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)11 L
C)17 L
D)30.L
E)5.6 L

Question 32

At STP,what is the mass 13.0 L of methane,CH₄ ?

A)0.580 g
B)16.0 g
C)9.31 g
D)27.6 g
E)22.4 g

Question 33

1 mole of a gas occupies 22.4 L at ________.

A)0 °C and 0.50 atm
B)0 °C and 760 mmHg
C)100 °C and 1 atm
D)100 °C and 10 atm
E)0 K and 1 atm

Question 34

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

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

Question 35

At STP,temperature and pressure have the values of ________.

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

Question 36

A diver exhales a bubble with a volume of 250 mL at a pressure of 2.4 atm and a temperature of 15 °C.What is the volume of the bubble when it reaches the surface where the pressure is 1.0 atm and the temperature is 27 °C,if the amount of gas does not change?

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

Question 37

At STP,what is the volume of 1.0 mole of carbon dioxide?

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

Question 38

At 570.mmHg and 25 °C,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 175 °C,if the amount of gas does not change?

A)1560 mmHg
B)210 mmHg
C)7000 mmHg
D)690 mmHg
E)470 mmHg

Question 39

According to Avogadro's law,________.

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

Question 40

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 in the summer,if the volume and amount of gas do not change?

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

Question 41

A gas has a volume of 12.0 L when the pressure is 840.torr.When the pressure changes to 600.torr,what is the new volume,if there is no change in temperature or amount of gas?

Question 42

A barometer is usually filled with ________.

Question 43

A gas has a volume of 45.0 L and a pressure of 540.mmHg when the temperature is 27 °C.What is the volume when the pressure changes to 800.mmHg with a temperature of -65 °C,if there is no change in the amount of gas?

Question 44

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)2.1 atm
B)0.55 atm
C)1.0 × 10³ atm
D)1.5 atm
E)1600 atm

Question 45

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

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

Question 46

A gas has a volume of 46.0 L when the temperature is 400.K.When the temperature changes to 500.K,what is the new volume,if there is no change in pressure or amount of gas?

Question 47

A gas has a pressure of 540.torr when the temperature is 127 °C.When the temperature changes to 27 °C,what is the new pressure,if there is no change in volume or amount of gas?

Question 48

A gas has a volume of 36.0 L and a pressure of 750.torr when the temperature is 10.°C.What is the pressure if the volume changes to 15.0 L and the temperature changes to 78 °C,if the amount of gas stays the same?

Question 49

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

A)high O₂ ,low CO₂ ,oxygenated blood
B)high O₂ ,low CO₂ ,deoxygenated blood
C)high O₂ ,high CO₂ ,oxygenated blood
D)high O₂ ,high CO₂ ,tissue
E)low O₂ ,low CO₂ ,deoxygenated blood

Question 50

According to Boyle's Law,when the volume increases,the pressure ________.

Question 51

STP is ________ mmHg and ________K.

Question 52

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

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

Question 53

What is the volume,in L,of 36.0 g of CH4 at STP?

Question 54

The pressure exerted by a gas on its container is directly proportional to ________.

A)the volume of the container
B)the mass of the individual gas molecules
C)the Celsius temperature of the gas
D)the number of molecules of gas in the sample
E)the Fahrenheit temperature of the gas

Question 55

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

Question 56

A gas has a pressure of 700.mmHg when the temperature is 107 °C.At what temperature (°C)will the pressure be 600.mmHg,if there is no change in volume or amount of gas?

Question 57

A temperature of 273 °C is equivalent to ________ K.

Question 58

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

Question 59

One atmosphere is the same pressure as ________ mmHg.

Question 60

Nitrogen makes up about ________ percent of the atmosphere.

Question 61

STP stands for 0 °C and 760 mmHg.

Question 62

The air we breathe is about 21% oxygen.

Question 63

The kinetic energy of a gas sample is directly proportional to the Kelvin temperature of the gas.

Question 64

During inspiration,we use 100% of the oxygen in the air we breathe.

Question 65

Gas law calculations require the use of the Kelvin temperature scale.

Question 66

The speed of gas molecules is related to the volume of the container.

Question 67

In deoxygenated blood,the partial pressure of carbon dioxide is greater than the partial pressure of oxygen left.

Question 68

The pressure increases as the volume increases,if temperature and amount of gas do not change.

Question 69

The pressure exerted by a gas on its container is inversely related to its Kelvin temperature.

Question 70

The pressure decreases as the temperature decreases,if volume and amount of gas do not change.

Question 71

The volume of 1 mole of any gas at STP is 22.4 L.

Question 72

The pressure decreases as the volume increases,if temperature and amount of gas do not change.

Question 73

The volume decreases as the temperature increases,if pressure and amount of gas do not change.

Question 74

The total pressure of a mixture of CO2 and O2 is 780 mmHg.If the pressure of the CO2 is 560.torr,what is the pressure of O2?

Question 75

At 0 K,all molecular motion stops.

Question 76

What is the total pressure (in atm)of a gas mixture,which has CH4 600.torr and
He 450.mmHg?