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Gas Laws Review 2
Test Description: Reviews pressure and the gas laws.
Instructions: Answer all questions to get your test result.
1) When Gay-Lussac's law of combining volumes holds, which of the following can be expressed in ratios of small whole numbers?
A
volumes of gaseous reactants and products
B
pressure before and pressure after reaction
C
molar masses of products and reactants
D
temperature of gaseous reactants and products
2) The principle that under similar pressures and temperatures, equal volumes of gases contain the same number of molecules is attributed to
A
Avogadro
B
Boyle
C
Dalton
D
Graham
3) Equal volumes of diatomic gases under the same conditions of temperatures and pressure contain the same number of
A
electrons
B
protons
C
ions
D
molecules
4) The standard molar volume of a gas at STP is
A
1 L
B
g/22.4 L
C
g-mol wt./22.4 L
D
22.4 L
5) When pressure, volume, and temperature are known, the ideal gas law can be used to calculate
A
rate of effusion
B
the ideal gas constant
C
the chemical formula
D
molar amount
6) What is the value of the gas constant?
A
0.0821 L*atm/mol*K
B
0.0281 L*atm/mol*K
C
0.281 L*atm
D
0.0821 mol*K
7) Calculate the approximate volume of a 0.600 mol sample of gas at 15.0 degrees C and a pressure of 1.10 atm.
A
12.9 L
B
24.6 L
C
139 L
D
22.4 L
8) Why can you smell perfume throughout a room after you spray it in one section of the room?
A
It diffuses
B
It is dense
C
It condenses
D
It is compressed
9) When gas molecules randomly encounter and pass through a small opening in a container this is known as
A
effusion
B
vaporization
C
distillation
D
diffusion
10) What determines the average kinetic energy of the molecules of any gas?
A
Pressure
B
Molar Mass
C
Temperature and Pressure
D
Temperature
*select an answer for all questions
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