Test Bank Docx – Air A Study of the Gases in Our | Chapter 6

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Chapter: Chapter 6

Multiple Choice, Essay, Fill-In-The-Blank

1. List the three phases of matter, from slowest to fastest particle speed.

A) solid, liquid, gas

B) liquid, solid, gas

C) gas, liquid, solid

D) solid, gas, liquid

chaptername: 6

questiontype: Multiple Choice

section: 6.1

2. True or False: Gases mix thoroughly with one another.

A) true

B) false

chaptername: 6

questiontype: Multiple Choice

section: 6.1

3. Identify whether the substance described is a solid, liquid or gas at room temperature: A substance that must be stored in a sealed, leak-proof container.

A) solid

B) liquid

C) gas

chaptername: 6

questiontype: Multiple Choice

section: 6.1

4. True or False: All particles of a gas in a particular sample will move at the same speed.

A) true

B) false

chaptername: 6

questiontype: Multiple Choice

section: 6.1

5. A person wearing strong perfume enters a room where you are sitting. At what time of year would you smell this perfume more quickly?

A) You would smell this more quickly in the winter when the heat is on (keeping the room at a toasty 74 degrees).

B) You would smell this more quickly in the summer when the air conditioner is running (keeping the room at a nice, cool 68 degrees).

C) None of the above

chaptername: 6

questiontype: Multiple Choice

section: 6.1

6. True or False: During the process of diffusion, gas particles move in a straight line from one point to another (for example from one side of a room to the other).

A) true

B) false

chaptername: 6

questiontype: Multiple Choice

section: 6.1

7. Which gas makes up the largest portion of clean, unpolluted air?

A) oxygen

B) nitrogen

C) carbon dioxide

D) carbon monoxide

E) argon

chaptername: 6

questiontype: Multiple Choice

section: 6.1

8. Explain why a potato chip bag that is filled in a plant in Miami will become larger if shipped to a store in Denver.

chaptername: 6

questiontype: Essay

section: 6.2

Feedback: The answer should include the following information: The air pressure in Denver is lower than in Miami. If a package is filled in Miami it will expand in Denver because the pressure in the bag will be higher than the atmospheric pressure, causing the bag to push outward.

9. Identify the incorrect portion(s) of this statement and tell why each is incorrect: A balloon inflates as one blows into it because human breath is hotter than the air originally in the balloon; hotter air fills a larger volume than colder air.

chaptername: 6

questiontype: Essay

section: 6.2

Feedback: The answer should include the following information: A balloon inflates as you blow into it because you are adding gas particles to the balloon. Hotter air does fill a larger volume than colder air, but this is not the reason that the balloon inflates. The balloon would inflate if it were filled with cold air also.

10. Explain why atmospheric pressure changes with altitude.

A) as altitude increases, atmospheric pressure decreases

B) as altitude increases, atmospheric pressure increases

C) as altitude decreases, atmospheric pressure decreases

D) none of the above

chaptername: 6

questiontype: Multiple Choice

section: 6.2

11. Which location will have the lowest atmospheric pressure?

A) Chicago airport (619 feet)

B) Grand Canyon National Park (6606 feet)

C) San Francisco airport (11 feet)

D) Atlanta airport (1025 feet)

E) Boise airport (2858 feet)

chaptername: 6

questiontype: Multiple Choice

section: 6.2

12. Which location will have the highest atmospheric pressure?

A) Chicago airport (619 feet)

B) Grand Canyon National Park (6606 feet)

C) San Francisco airport (11 feet)

D) Atlanta airport (1025 feet)

E) Boise airport (2858 feet)

chaptername: 6

questiontype: Multiple Choice

section: 6.2

13. True or False: Gases undergo a higher number of collisions when the atmospheric pressure is higher.

A) true
B) false

chaptername: 6

questiontype: Multiple Choice

section: 6.2

14. Due to the force of gravity, which is true about the particles of a sample of gas at sea level versus those at higher altitude?

A) The atoms and molecules of a gas will move more quickly at sea level than at higher altitude.

B) The mean free path between atoms and molecules of a gas will be longer at sea level.

C) The volume of a sample of gas will be larger at sea level than at higher altitude.

D) The number of particles in a particular volume will be greater at higher altitude than at sea level.

E) The particles of the gas at sea level will be closer together than those at higher altitude.

chaptername: 6

questiontype: Multiple Choice

section: 6.2

15. True or False: The percent composition of air is different at higher altitude than it is at sea level.

A) true

B) false

chaptername: 6

questiontype: Multiple Choice

section: 6.2

16. Which instrument is used to measure atmospheric pressure?

A) a gas chromatograph

B) a thermometer

C) a barometer

D) a pH meter

E) a voltmeter

chaptername: 6

questiontype: Multiple Choice

section: 6.2

17. At sea level, the atmospheric pressure is usually equal to about

A) 100 millimeters of mercury

B) 2 atmospheres

C) 350 millimeters of mercury

D) 760 millimeters of mercury

E) None of the above

chaptername: 6

questiontype: Multiple Choice

section: 6.2

18. If the pressure in Denver is 0.83 atm, how many mm of mercury (Hg) is this?

A) 760 mm Hg

B) 0.83 mm Hg

C) 1 mm Hg

D) 631 mm Hg

E) 22.4 mm Hg

chaptername: 6

questiontype: Multiple Choice

section: 6.2

19. Mercury is a better choice for use in barometers than water because

A) It is less dense.

B) It vaporizes much more slowly.

C) It is cheaper.

D) It is more colorful and easier to see.

E) It is poisonous.

chaptername: 6

questiontype: Multiple Choice

section: 6.2

20. Which is true about the air at a high altitude versus the air at a lower altitude?

A) Air contains a higher number of nitrogen molecules at higher altitudes.

B) There are fewer overall molecules of air at high altitude.

C) The percent of each gas present in air changes from high to low altitude.

D) The number of ozone molecules at high altitude is higher than at low altitude because the ozone layer is closer.

chaptername: 6

questiontype: Multiple Choice

section: 6.2

21. Explain why you should put air in the tires of your car before you drive it instead of immediately after you drive it.

chaptername: 6

questiontype: Essay

section: 6.2

Feedback: The answer should include the following information: Since the volume of a certain amount of gas will expand as the temperature increases, you should fill your tires before you drive it so that they will be filled to the appropriate pressure. If you fill your tires after you drive your car, the gas molecules in your tires will be of a greater volume and a higher pressure and you could exceed the pressure that is advised by the manufacturer for a particular set of tires.

22. The primary component of natural gas is

A) octane

B) propane

C) methane

D) butane

chaptername: 6

questiontype: Multiple Choice

section: 6.2

23. When methane forms in the ground, it forms from

A) the decomposition of organic matter.

B) the reaction of water and carbon dioxide in the water table and below.

C) out-gassing of compounds released from the earth’s core.

D) the combination of formaldehyde that is released from the mantle with other compounds from the Earth’s surface.

chaptername: 6

questiontype: Multiple Choice

section: 6.2

24. Another name for hydraulic fracturing, the process by which natural gas is removed from underground is

A) hydrolyzing.

B) fracking.

C) shale cracking.

D) benzenosis.

chaptername: 6

questiontype: Multiple Choice

section: 6.2

25. Methane is more dangerous in certain ways than carbon dioxide because

A) it is lighter and moves more easily through the atmosphere.

B) it dissolves in water more quickly.

C) it can be produced in a home laboratory without sophisticated equipment.

D) it is a more potent greenhouse gas.

chaptername: 6

questiontype: Multiple Choice

section: 6.2

26. A beach containing 3.0 moles of sand grains would have how many individual grains of sand?

A) 6.02 × 10²³

B) 3.0

C) 3.0 × 6.02 × 10²³

D) 1.8 × 10²³

chaptername: 6

questiontype: Multiple Choice

section: 6.3

27. If a balloon at STP has a volume of 89.6 L, how many moles of gas does it contain?

A) 22.4 moles

B) 1.0 mole

C) 89.6 moles

D) 4.0 moles

E) 6.02 × 10²³ moles

chaptername: 6

questiontype: Multiple Choice

section: 6.3

28. Which substance would be most likely to be counted using the mole?

A) donuts

B) marbles

C) oxygen molecules

D) cars

E) telephones

chaptername: 6

questiontype: Multiple Choice

section: 6.3

29. A balloon at STP holds 2.4 × 10²⁴ ozone molecules. About how many moles of ozone does it contain?

A) 1.0 mole

B) 2.0 moles

C) 3.0 moles

D) 4.0 moles

E) 22.4 moles

chaptername: 6

questiontype: Multiple Choice

section: 6.3

30. If a sealed box at STP holds a total of 6.7 moles of clean air, how many oxygen molecules does it contain?

A) 8.4 × 10²³ oxygen molecules

B) 6.02 × 10²³ oxygen molecules

C) 1.3 × 10²³ oxygen molecules

D) 1.4 × 10²⁴ oxygen molecules

E) 4.0 × 10²⁴ oxygen molecules

chaptername: 6

questiontype: Multiple Choice

section: 6.3

31. If a sealed box at STP holds 8.0 moles of clean air, how many molecules of nitrogen does it contain?

A) 8.4 × 10²³ oxygen molecules

B) 6.02 × 10²³ oxygen molecules

C) 1.3 × 10²³ oxygen molecules

D) 3.8 × 10²⁴ oxygen molecules

E) 4.8 × 10²⁴ oxygen molecules

chaptername: 6

questiontype: Multiple Choice

section: 6.3

32. At what temperature is a gas considered to be at STP?

A) 25°C

B) 298 K

C) 0°C

D) 0 K

E) 100°C

chaptername: 6

questiontype: Multiple Choice

section: 6.3

33. What volume will 10.0 moles of a gas fill at STP?

A) 2.4 L

B) 22.4 L

C) 224 L

D) 100 L

E) 10.0 L

chaptername: 6

questiontype: Multiple Choice

section: 6.3

34. Which describes an experiment in which only pressure and temperature change?

A) taking a shampoo bottle from sea level to altitude

B) putting air in your tires

C) heating a sealed glass sphere

D) putting a balloon in liquid nitrogen

E) none of these

chaptername: 6

questiontype: Multiple Choice

section: 6.3

35. Which describes an experiment in which only volume and temperature change?

A) taking a shampoo bottle from sea level to altitude

B) putting air in your tires

C) heating a sealed glass sphere

D) pouring liquid nitrogen over a balloon

E) none of these

chaptername: 6

questiontype: Multiple Choice

section: 6.3

36. Which describes an experiment in which only moles of gas and pressure change?

A) taking a sealed shampoo bottle from sea level to altitude

B) putting air in your tires

C) heating a sealed glass sphere

D) pouring liquid nitrogen over a balloon

E) none of these

chaptername: 6

questiontype: Multiple Choice

section: 6.3

37. Of the four gas variables, which are inversely proportional to one another?

A) P and V

B) P and T

C) V and T

D) V and n

chaptername: 6

questiontype: Multiple Choice

section: 6.3

38. Indicate which gas particles are moving at the faster speed.

A) 1 billion He gas atoms at 273 K

B) 1 billion nitrogen molecules at 273 K

chaptername: 6

questiontype: Multiple Choice

section: 6.3

39. Indicate which gas particles are moving at the faster speed.

A) 8 billion He gas atoms at 298 K

B) 8 billion He gas atoms at 95°F

chaptername: 6

questiontype: Multiple Choice

section: 6.3

40. A rigid, sealed box at 25°C is heated to 50°C. Which gas variable changes?

A) pressure

B) volume

C) moles of gas

chaptername: 6

questiontype: Multiple Choice

section: 6.3

41. Which of the following gases would move at the fastest speed, assuming the temperature of each gas is the same?

A) oxygen

B) nitrogen

C) carbon dioxide

chaptername: 6

questiontype: Multiple Choice

section: 6.3

42. When you start your car on a chilly winter day, the “low tire pressure” light turns on. Describe how you would get it to turn off without adding air to your tires or disabling the light.

chaptername: 6

questiontype: Essay

section: 6.3

Feedback: The answer should include the following information: You could drive your car until your tires warmed up. As they warm, the gas particles in the tires will move more rapidly, causing the volume in the tires to increase.

43. Your score on a chemistry exam goes up 5% for every hour that you study. What are the pair of variables described in this scenario and are they inversely or directly related?

chaptername: 6

questiontype: Essay

section: 6.4

Feedback: The answer should include the following information: The variables are your score on the exam and the number of hours you study. The variables are directly proportional.

44. The number of hours you sleep decreases by one each day for a week before a full moon. What are the variables described in this scenario and are they inversely or directly related?

chaptername: 6

questiontype: Essay

section: 6.4

Feedback: The answer should include the following information: The variables are the number of hours you sleep and how many days it is before a full moon. The variables are directly related. As the number of days until the full moon decreases, so do the number of hours you sleep.

45. Name two gas variables that are directly proportional to on another.

chaptername: 6

questiontype: Essay

section: 6.4

Feedback: The answer should include the following information: V and T

46. The lungs of a scuba diver expand as he rises from 100 m below the surface to 10 m below the surface. The gas law that describes this scenario is _____.

chaptername: 6

questiontype: Fill-In-The-Blank

section: 6.4

47. A balloon shrinks when taken from inside a hot car and put into a freezer. The gas law that describes this scenario is_____.

chaptername: 6

questiontype: Fill-In-The-Blank

section: 6.4

48. If the average molecular speed of argon gas at 25°C is 350 m/s, estimate the average molecular speed at 35°C.

A) 100 m/s

B) 200 m/s

C) 450 m/s

chaptername: 6

questiontype: Multiple Choice

section: 6.4

49. For the image shown below, choose which line represents the gas with the lowest molar mass. The x-axis represents the molecular speed in m/s and the y-axis represents the number of atoms.

A) The tallest, narrowest line

B) The shortest, widest line

C) The second tallest, second narrowest line

D) The third tallest, third narrowest line

chaptername: 6

questiontype: Multiple Choice

section: 6.4

50. For the image shown below, choose which line represents the gas at the lowest temperature. The x-axis represents the molecular speed in m/s and the y-axis represents the number of atoms.

A) The tallest, narrowest line

B) The shortest, widest line

C) The second tallest, second narrowest line

D) The third tallest, third narrowest line

chaptername: 6

questiontype: Multiple Choice

section: 6.4