# Quiz 6: Gases

Chemistry

Q 1Q 1

According to the kinetic theory of gases, the size of a gas particle is large compared to the distances that separate them.

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False

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Q 5Q 5

One torr is an equivalent unit of one millimeter of mercury, the amount of pressure exerted by a column of mercury exactly 1 mm high.

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True False

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Q 10Q 10

A sample of a gas has an initial volume of 15.0 L and an initial temperature of 235 K. The temperature of the gas increases to 313 K, if its volume increases to 20.0 L.

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True False

Q 11Q 11

A sample of a gas has an initial volume of 16.8 L and an initial temperature of 50°C. The volume of the gas increases to 33.6 L if its temperature is increased to 100° C.

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True False

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Q 14Q 14

Avogadro's law states that equal volumes of different gases at the same temperature and pressure contain the same amount of gas.

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True False

Q 15Q 15

If a 2.45 L volume of gas contains 4.5 × 10

^{21}gas particles, a 4.9 L volume of gas will contain 4.5 × 10^{22}gas particles.Free

True False

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Q 18Q 18

The equation, PV = nRT is called the ideal gas law, a gas law that relates all four independent physical properties of a gas under any conditions..

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True False

Q 19Q 19

A 6.00 mol sample of O

_{2}has a pressure of 0.80 atm and a temperature of 68°C. Its volume is 41.8L.Free

True False

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Q 21Q 21

If mixture of H

_{2}at 5.00 atm and N_{2}at 8.00 atm is stored in a container, the mixture's pressure will be 10.1 atm.Free

True False

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Q 24Q 24

Which of the following statements is consistent with the kinetic theory of gases?
A) Gases consist of tiny stationary particles of matter.
B) Gases constantly collide with each other.
C) The size of a gas particle is large when compared to the distances between them.
D) A net loss of energy occurs when particles collide.
E) Strong interactive forces exist between the particles of a gas.

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Multiple Choice

Q 25Q 25

A gas that exactly follows the statements of the kinetic theory is called _____.
A) real gas
B) kinetic gas
C) dynamic gas
D) ideal gas
E) stationary gas

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Q 26Q 26

is a gas that deviates slightly from agreeing perfectly with the kinetic theory of gases. X is an example of _____ gas.
A) real
B) ideal
C) supreme
D) static
E) sturdy

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Multiple Choice

Q 27Q 27

_____ refers to the force of all the gas particle/wall collisions divided by the area of the wall.
A) Temperature
B) Pressure
C) HYPERLINK "http://en.wikipedia.org/wiki/Buoyancy" Buoyancy
D) Density
E) Concentration

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Multiple Choice

Q 28Q 28

If a force of 1.50 x10

^{3}N is pressed against an area of 3.00 m^{2}, what is the pressure in torr? A) 3.75 B) 5.65 C) 500 D) 565 E) 3,800Free

Multiple Choice

Q 29Q 29

Which of the following is the SI approved unit of pressure?
A) Pounds/inch
B) Millimeters of mercury
C) Atmosphere
D) N/cm

^{2}E) PascalFree

Multiple Choice

Q 30Q 30

Pressure at a point deep in an ocean is estimated to be 1.074 × 10

^{3}kPa. What is the average atmospheric pressure at that point? A) 1.074 × 10^{-}^{1}atm B) 1.060 × 10^{6}atm C) 1.060 x 10^{1}atm D) 1.074 × 10^{-}^{4}atm E) 1.074 × 10^{3}atmFree

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Multiple Choice

Q 32Q 32

Which of the following statements is true about the relationship between pressure and volume?
A) Pressure and volume are independent of each other.
B) Pressure and volume decrease with an increase in temperature.
C) Pressure increases as volume decreases.
D) Pressure and volume are not related to temperature.
E) Pressure increases as volume increases.

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Multiple Choice

Q 33Q 33

Boyle's law explains the relationship between _____.
A) pressure and temperature
B) volume and temperature
C) the amount of gas and temperature
D) pressure and the amount of gas
E) pressure and volume

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Multiple Choice

Q 34Q 34

Experiments show that the volume of a gas is related to its temperature in _____.
A) Celsius
B) Fahrenheit
C) Kelvin
D) Joule
E) Newton

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Multiple Choice

Q 35Q 35

Which of the following properties of gases must be held constant when applying Boyle's law?
A) Pressure
B) Amount of gas
C) Volume
D) Shape of the container
E) Size of the container

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Multiple Choice

Q 36Q 36

A gas has an initial pressure of 1.823 atm and an initial volume of 8.026 L. What is its new pressure if volume is changed to 6.323 L? Assume temperature and amount of gas are held constant.
A) 0.9342 atm
B) 1.436 atm
C) 3.105 atm
D) 2.314 atm
E) 27.84 atm

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Multiple Choice

Q 37Q 37

A gas has an initial pressure of 1,080 torr and an initial volume of 586 mL. What is its new volume if pressure is changed to 1.30 atm? Assume temperature and amount of gas are held constant.
A) 370 mL
B) 486 L
C) 641 L
D) 486 L
E) 641 mL

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Multiple Choice

Q 38Q 38

Which of the following laws states for a given amount of a gas, when pressure is constant?
A) Charles's law
B) Boyle's law
C) Avogadro's law
D) Graham's law
E) Gay-Lussac's law

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Q 40Q 40

A sample of gas has an initial volume of 5.00 L and an initial temperature of 360. K. What is the new volume if the temperature is increased to 900. K? Assume constant pressure and amount for the gas.
A) 2.00 L
B) 3.00 L
C) 8.00 L
D) 12.5 L
E) 5.00 L

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Multiple Choice

Q 41Q 41

A sample of gas has an initial volume of 87.01 mL and an initial temperature of 295.5 K. What is the new temperature if the volume is decreased to 50.00 mL? Assume constant pressure and amount for the gas.
A) 169.8 K
B) 514.2 K
C) 158.6 K
D) 530.5 K
E) 14.72 K

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Multiple Choice

Q 42Q 42

A sample of gas has a volume of 60. mL and an initial temperature of 380 K. The temperature must be changed to _____ in order to halve the volume. Assume constant pressure and amount for the gas.
A) 273 K
B) 76 K
C) 190 K
D) 760 K
E) 780 K

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Multiple Choice

Q 43Q 43

A gas has an initial volume of 65.08 mL and an initial temperature of 577°C. What is its new volume if temperature is changed to 417°C? Assume pressure and amount of gas are held constant.
A) 56.2 mL
B) 47.0 mL
C) 80.2 mL
D) 90.1 mL
E) 52.8 mL

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Multiple Choice

Q 44Q 44

Which of the following gas laws relates pressure with absolute temperature?
A) Avogadro's law
B) Graham's law
C) Charles's law
D) Boyle's law
E) Gay-Lussac's law

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Multiple Choice

Q 45Q 45

What is the final pressure of a gas whose initial pressure is 590 torr, initial temperature is 308 K, and final temperature is 286 K? Assume volume and amount of gas are held constant.
A) 585 torr
B) 386 torr
C) 150 torr
D) 550 torr
E) 631 torr

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Multiple Choice

Q 46Q 46

What is the final temperature of a gas whose initial pressure is 455 torr, initial temperature is 105°C, and final pressure is 690 torr? Assume volume and amount of gas are held constant.
A) 300.°C
B) 69°C
C) 159°C
D) -23.7°C
E) 186°C

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Multiple Choice

Q 47Q 47

Which of the following laws consider amount of gas as a variable?
A) Charles's law
B) Avogadro's law
C) Combined gas law
D) Boyle's law
E) Gay-Lussac's law

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Multiple Choice

Q 48Q 48

A 3.8 mL volume of gas contains 5.6 × 10

^{22}gas particles. How many gas particles are there in 15 mL if the gas is at the same pressure and temperature? A) 3.8 × 10^{22}B) 1.5 × 10^{23}C) 2.2 × 10^{23}D) 1.5 × 10^{22}E) 5.4 × 10^{22}Free

Multiple Choice

Q 49Q 49

Which of the following laws proposes a relationship between pressure, temperature, and volume of a gas when the amount of gas is a constant?
A) Gay-Lussac's law
B) Boyle's law
C) Combined gas law
D) Charles's law
E) Avogadro's law

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Multiple Choice

Q 50Q 50

Which of the following is a constant when applying the combined gas law?
A) Pressure
B) Volume
C) Amount of gas
D) Temperature
E) Density

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Multiple Choice

Q 51Q 51

A sample of gas reduces its pressure and absolute temperature by 55 percent. What is the percentage change in volume?
A) 0
B) 20
C) 40
D) 50
E) 100

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Multiple Choice

Q 52Q 52

A sample of gas at an initial volume of 65.0 mL, an initial pressure of 866 torr, and an initial temperature of 10.0°C simultaneously changes its temperature to 60.0°C and its volume to 46.0 mL. What is the final pressure of the gas?
A) 154 torr
B) 2,150 torr
C) 6,210 torr
D) 168 torr
E) 1,440 torr

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Multiple Choice

Q 53Q 53

Which of the following equations represent the ideal gas law?
A) P

_{1}V_{1}= P_{2}V_{2}B) C) D) E) PV = nRTFree

Multiple Choice

Q 54Q 54

Which of the following statements is true about the ideal gas law?
A) Pressure is considered to be a constant when applying the ideal gas law.
B) The ideal gas law does not require a change in the conditions of a gas sample.
C) Volume is considered to be a constant when applying the ideal gas law.
D) According to ideal gas law, temperature is not an independent property of gases.
E) The ideal gas law is represented by the equation P

_{1}V_{1}= P_{2}V_{2}.Free

Multiple Choice

Q 55Q 55

A 5.86 mol sample of Ne has a pressure of 263 torr and a temperature of 54.0°C. What is its volume?
A) 0.598 L
B) 455 L
C) 0.0988 L
D) 460 L
E) 58.6 L

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Multiple Choice

Q 56Q 56

A 1.6608 mol sample of O

_{2}has a pressure of 0.9561 atm and a temperature of 386 K. What is its volume? A) 55.0 L B) 59.0 L C) 30.2 L D) 50.6 L E) 59.8 LFree

Multiple Choice

Q 57Q 57

For a 0.0962 mol sample of O

_{2}, V = 58 L and T = 456 K. What is its pressure? A) 0.61 atm B) 0.021 atm C) 0.21 atm D) 0.047 atm E) 0.062 atmFree

Multiple Choice

Q 58Q 58

Which of the following is considered the standard temperature under STP?
A) 0 K
B) 273 K
C) 160 K
D) 300 K
E) 313 K

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Q 59Q 59

What is the molar volume of oxygen gas (O

_{2}) at STP? A) 44.8 L B) 22.4 L C) 103.04 L D) 411.2 L E) 716.8 LFree

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Q 60Q 60

How many moles of H

_{2}are present in 69.2 L at STP? A) 17.3 mol B) 34.6 mol C) 3.09 mol D) 4.00 mol E) 8.65 molFree

Multiple Choice

Q 61Q 61

Which of the following statements is consistent with the Dalton's law of partial pressures?
A) The total pressure of a mixture of gases is less than the sum of the partial pressures of individual gases.
B) The total pressure of a gas mixture is equal to the sum of the partial pressures of the components.
C) The total pressure of a gas mixture is calculated by assessing the weighted average of the molecular pressures of the components.
D) The total pressure of a gas mixture is independent of the partial pressures of the components.
E) The total pressure of a mixture of gases is more than the sum of the partial pressures of individual gases.

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Multiple Choice

Q 62Q 62

A mixture of H

_{2}at 566 torr and O_{2}at 600 torr is in a container. What is the total pressure in the container? A) 3,396 torr B) 566 torr C) 600 torr D) 1,166 torr E) 3,000 torrFree

Multiple Choice

Q 63Q 63

A mixture of helium at 1.600 atm and neon at 900.0 torr is in a container. What is the total pressure in the container?
A) 1,008 torr
B) 901.6 torr
C) 450.8 torr
D) 2,116 torr
E) 598 torr

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Multiple Choice

Q 64Q 64

H

_{2}stored in a 50.0 L container has a pressure of 500.0 torr. O_{2}stored in a 25.0 L container has a pressure of 800.0 torr. If both these gases are released together to be stored in a 100.0 L container, what is the total pressure in the 100.0 L container? A) 800 torr B) 500 torr C) 450 torr D) 650 torr E) 1,300 torrFree

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Q 65Q 65

CO

_{2}generated by the decomposition of ZnCO_{3}, is collected in a 5.6 L container over water. If the temperature is 40.0°C and the total pressure inside the container is 580 torr, how many moles of CO_{2}were generated? A) 0.09 mol B) 0.74 mol C) 0.18 mol D) 0.15 mol E) 0.86 molFree

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Q 66Q 66

A container has a mixture of H

_{2}at 1.2 atm and O_{2}at 1.6 atm. What is the mole fraction of H_{2}? A) 0.55 B) 0.45 C) 0.57 D) 0.40 E) 0.43Free

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Q 70Q 70

What are the various units of pressure? Show how to convert one pressure unit into another using dimensional analysis.
The formal, SI-approved unit of pressure is the pascal (Pa), which is defined as 1 N/m

^{2}. A common unit of pressure is the atmosphere (atm), which was originally defined as the average atmospheric pressure at sea level. A more reliable and common unit is millimeters of mercury (mmHg), which is the amount of pressure exerted by a column of mercury exactly 1 mm high. An equivalent unit is the torr, which equals 1 mmHg. 1.00 atmFree

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Q 73Q 73

Briefly describe Gay-Lussac's law. Highlight the difference between Gay-Lussac's and Charles's law.

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Q 82Q 82

The _____ theory of gases is a fundamental model that describes the physical properties of gases.

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Q 84Q 84

A _____ is a simple mathematical formula that allows you to model or predict the behavior of a gas.

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Q 89Q 89

_____ law states that equal volumes of different gases at the same temperature and pressure contain the same number of particles of gas.

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Q 94Q 94

The ratio of the number of moles of one of the components in a mixture divided by the total number of moles in the sample is called that component's _____.

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