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Section 1: Gases

Gases

1.

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According to the kinetic-molecular theory, which of these describes a gas?
A)large particles in constant, random motion
B)large particles far apart in uniform motion
C)small particles in constant, random motion
D)small particles far apart in uniform motion
2.

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Which of the following illustrates effusion of a gas?
A)Cooking aromas from the kitchen can be detected by a person on the front porch.
B)A dog follows a scent during a search and rescue mission.
C)Fragrance of cologne is present in a room in which none has been used.
D)A tire deflates after being punctured by a nail.
3.

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A mixture of oxygen, carbon dioxide and nitrogen has a total pressure of 0.78 atm. What is the partial pressure of O2, if the partial pressure of CO2 is 0.46 atm and the partial pressure of N2 is 0.08 atm?
A)0.15 atm
B)0.24 atm
C)1.69 atm
D)2.40 atm
4.
The theory that describes the behavior of gases in terms of the motion of gas particles is _____________.
A)the theory of intermolecular forces
B)Graham’s law of effusion
C)Dalton’s law of parhal pressures
D)the kinetic-molecular theory
5.
The measure of the average kinetic energy of the particles in a sample of matter is _____.
A)temperature
B)speed
C)velocity
D)heat
6.
Which of the following is the general definition of a gas?
A)Matter with a fixed volume and a fixed shape.
B)Matter with a fixed volume but no fixed shape.
C)Matter with no fixed volume and no fixed shape.
D)Matter with a fixed shape but no fixed volume.
7.
Which of the following gases will diffuse the fastest at room temperature?
A)Ne
B)CO2
C)N2
D)H2
8.
At the same ______, the particles of different gases have the same average kinetic energy.
A)volume
B)pressure
C)density
D)temperature
9.
A device that is used to measure atmospheric pressure is a ___________.
A)barometer
B)thermometer
C)kilometer
D)micrometer
10.
One atmosphere is equal to ____________.
A)1 mm Hg
B)760 cm Hg
C)760 mm Hg
D)1 cm Hg
11.
In a balloon filled with air (about 80% nitrogen and 20% oxygen), the pressure in the balloon is primarily ___________________________.
A)the pressure exerted by nitrogen
B)the pressure exerted by oxygen
C)the sum of the pressures exerted by nitrogen and oxygen
D)zero
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