Chemistry Concepts and Applications

Chapter 11: Behavior of Gases

Standardized Test Practice

1
High on a mountain, the reading on a barometer decreases because __________.

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A)the temperature is lower
B)the pressure is lower
C)the force of gravity is less
D)the force of gravity is greater
2
When the pressure is doubled, the number of molecules in the pump __________.

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A)is doubled
B)is halved
C)stays the same
D)is tripled
3
Two liters of hydrogen gas and and one liter of oxygen react to form some volume of the molecule shown in the diagram. Assume temperature and pressure remain the same. What is that volume?

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A)3 liters
B)2 liters
C)1 liter
D)0 ligers
4
A gas exerts a force of 18.0 N over a surface area of 3.00 m2. What pressure does the gas exert?
A)0.167 atm
B)6.00 Pa
C)18.0 Pa
D)56.0 lb/in2
5
Volume constant, the pressure of a confined gas is directly proportional to the __________.
A)Celsius temperature
B)Kelvin temperature
C)molecular mass of the gas
D)size of the container
6
One atmosphere pressure equals __________.
A)101.3 kPa
B)760 Pa
C)76.0 torr
D)1000 kPa
7
Temperature constant, 20.0 L of gas at 844 mm Hg pressure expands to 40.0 L. What is the new pressure?
A)422 mm Hg
B)16 900 mm Hg
C)1.33 atm
D)3.75 kPa
8
A soda straw functions as __________ the liquid up the straw.
A)air pressure pulls
B)air pressure pushes
C)reduced pressure draws
D)sucking draws
9
The volume of a sample of helium gas is 4.80 L at 125oC and 99.8 kPa. If the volume decreases to 3.20 L and pressure remains 99.8 kPa, what is the new temperature?
A)-8° C
B)265° C
C)273 K
D)422° F
10
The set of conditions 1.00 atm pressure and 0.00 °C is defined as __________.
A)the boiling point of water
B)the melting point of air
C)room conditions
D)standard temperature and pressure
11
If all three substances are at the same temperature and pressure, 0.120 L of N2 gas reacts with 0.360 L of H2 gas to form __________ of NH3 gas.
A)0.240 L
B)0.100 L
C)0.480 L
D)22.4 L
12
__________ states that equal volumes of gases at the same temperature and pressure contain equal numbers of particles.
A)Boyle's Law
B)Charles's Law
C)Avogadro's principle
D)The Ideal Gas Law
13
976 L of oxygen at STP is compressed into a 12.0-L tank at 273 K. What is the gas pressure in the tank?
A)81.3 atm
B)1.00 atm
C)2000 mm Hg
D)2.00 atm
14
In the combined gas law, the __________ is held constant.
A)number of gas particles
B)pressure
C)temperature
D)volume
15
A sample of gas is held in a 10.0-L volume at 175 kPa. The temperature is kept constant while the volume is decreased until the pressure is 350 kPa. What is the new volume of the gas?
A)1.0 L
B)5.0 L
C)10.0 L
D)175 L
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