Chemistry Concepts and Applications

Chapter 11: Behavior of Gases

Chapter Test Practice

1
When will the piston stop moving out?

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A)When the temperatures are equal.
B)When the pressures are equal.
C)When the volumes are equal
D)When the number of molecules are equal.
2
In the diagram, the temperature of the air first increases, then decreases. Why does the pressure remain the same?

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A)The volume changes with temperature.
B)Pressure and temperature are unrelated.
C)Atmospheric pressure doesn't change.
D)The number of molecules changes.
3
Temperature constant, the pressure in a gas-filled container is directly proportional to the __________.
A)molecular mass of the gas
B)number of gas particles within
C)surface area of the container
D)volume of the container
4
__________ is the pressure that supports a 760-mm column of mercury.
A)one atmosphere
B)one lb/in2
C)one pascal
D)one meter
5
6.0 L of a gas exerts a pressure of 2.5 atm. When the pressure is increased to 10.0 atm, the gas volume is __________.
A)1.0 L
B)1.5 L
C)1.7 L
D)25 L
6
A balloon is filled with 10.0 L of oxygen at 27oC. If the temperature of the gas in the balloon increases to 127 oC, the pressure remains constant, and the balloon does not break, what is its new volume?
A)13.3 L
B)6.7 L
C)47.0 L
D)133 L
7
A sample of N2 gas occupies .500 L at 555 mm Hg and 62°C. If its volume and temperature change to 0.400 L at 122°C, respectively, what is its new pressure?
A)818 mm Hg
B)422 mm Hg
C)0.763 mm Hg
D)1320 mm Hg
8
The __________ method is commonly used to convert measurements to other units.
A)division
B)factor label
C)multiplication
D)trigonometric
9
The pressure of a sample of helium in a 1.0-L container is 0.857 atm. What is the new pressure if the sample is placed in a 0.5-L container? (Assume the temperature is constant.)
A)0.143 atm
B)0.429 atm
C)1.38 atm
D)1.71 atm
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