AnswersAA-F26 Physical ScienceTypes of Chemical Reactions

Types of Chemical Reactions — Unit test Answers

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The volume of a gas is 0.450 L when its pressure is 1.00 atm. If the temperature of the gas does not change, what is the pressure when its volume is changed to 2.00 L?Use .

Question illustration
A
0.225 atm
B
0.444 atm
C
2.25 atm
D
4.44 atm
2
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The incomplete table below shows a comparison of the different gas laws.NameVariablesConstantsEquationBoyle's law pressure, volume? Charles’s lawvolume, temperature??temperature, pressurevolume, moles of gas?pressure, temperature, volume?What is assumed to be constant when using the combined gas law?

Question illustration
A
pressure
B
number of moles
C
volume and moles of gas
D
pressure and temperature
3

Which describes the volume of 1 mol of gas at standard temperature and pressure?

A
The volume is greater for a larger mass of gas.
B
The volume is the same for any gas.
C
The volume depends on the size of the container.
D
The volume varies with the pressure.
4

If a gas is moved from a large container to a small container but its temperature and number of moles remain the same, what would happen to the pressure of the gas?

A
It would increase.
B
It would be halved.
C
It would stay the same.
D
It would slightly decrease.
5

Which statement can best be concluded from the ideal gas law?

A
The product of pressure and volume of an ideal gas is proportional to the absolute temperature.
B
All collisions between atoms or molecules are perfectly elastic and are not the result of any attractive forces.
C
The temperature, pressure, and volume of a gas are all related.
D
The behavior of a gas under real conditions does not obey the ideal gas law.
6

If the pressure, volume, and temperature of a gas are known, which can most likely be found by using the ideal gas law?

A
the molar amount of the gas
B
the partial pressure of the gas
C
the standard temperature and pressure
D
the molar mass
7

The gas in the piston is at constant temperature. A student increases the pressure on the piston from 2 atm to 3 atm.Which gas law would a student use to investigate this situation?

Question illustration
A
Boyle’s law
B
Charles’s law
C
Gay-Lussac’s law
D
ideal gas law
8

Which best defines partial pressure in a mixture of gases?

A
pressure that is exerted by all the gases of a mixture on the container
B
pressure that is exerted by one gas as if it occupied a container by itself
C
half of the pressure that is exerted by the gases of a mixture on the container
D
sum of the individual pressures that are exerted by two or more gases
9

Which equation represents the combined gas law?

A
P subscript 1 V subscript 1 equals P subscript 2 V subscript 2.
Option A
B
StartFraction V subscript 1 over T subscript 1 EndFraction equals StartFraction V subscript 2 over T subscript 2 EndFraction.
Option B
C
StartFraction P subscript 1 V subscript 1 over T subscript 1 EndFraction equals StartFraction P subscript 2 V subscript 2 over T subscript 2 EndFraction.
Option C
D
P subscript 1 V subscript 1 T subscript 1 equals P subscript 2 V subscript 2 T subscript 2.
Option D
10

A gas cylinder contains 2.0 mol of gas X and 6.0 mol of gas Y at a total pressure of 2.1 atm. What is the partial pressure of gas Y?Use .

Question illustration
A
0.50 atm
B
1.6 atm
C
2.1 atm
D
2.8 atm
11

What is the temperature of 0.750 mol of a gas stored in a 6,850 mL cylinder at 2.21 atm?Use and .

Question illustration
A
2.95 K
B
5.24 K
C
138 K
D
246 K
12

Which equation below represents Charles’s law?

A
StartFraction V subscript 1 over T subscript 1 EndFraction equals StartFraction V subscript 2 over T subscript 2 EndFraction.
Option A
B
StartFraction V subscript 1 over T subscript 2 EndFraction equals StartFraction V subscript 2 over T subscript 1 EndFraction.
Option B
C
V subscript 1 T subscript 1 equals P subscript 2 T subscript 2.
Option C
D
P subscript 1 V subscript 1 T subscript 1 equals P subscript 2 V subscript 2 T subscript 2.
Option D
13

The incomplete table below shows selected characteristics of gas laws.NameVariablesConstantsEquation? pressure, volumetemperature, moles of gasCharles’s law??Gay-Lussac’s law???combined gas law??What are the variables in Gay-Lussac’s law?

Question illustration
A
pressure and volume
B
pressure, temperature, and volume
C
pressure and temperature
D
volume, temperature, and moles of gas
14

The incomplete table below shows selected characteristics of gas laws.NameVariablesConstantsEquation? ??Charles’s law???temperature, pressure?Combined gas lawpressure, temperature, volume??Which constants would most likely be filled in the first row of the table?

Question illustration
A
temperature and moles of gas
B
volume and temperature
C
pressure and volume
D
pressure and moles of gas
15

What is the pressure of 0.540 mol of an ideal gas at 35.5 L and 223 K?Use and .

Question illustration
A
0.715 kPa
B
2.45 kPa
C
28.2 kPa
D
62.7 kPa
16

A balloon that had a volume of 3.50 L at 25.0°C is placed in a hot room at 40.0°C. If the pressure remains constant at 1.00 atm, what is the new volume of the balloon in the hot room?Use .

Question illustration
A
2.19 L
B
3.33 L
C
3.68 L
D
5.60 L
17

The absolute temperature of a gas is increased four times while maintaining a constant volume. What happens to the pressure of the gas?

A
It decreases by a factor of four.
B
It increases by a factor of four.
C
It decreases by a factor of eight.
D
It increases by a factor of eight.
18

Which law relates to the ideal gas law?

A
Option
Option A
B
Option
Option B
C
Option
Option C
D
Option
Option D
19

Which law states that the pressure and absolute temperature of a fixed quantity of gas are directly proportional under constant volume conditions?

A
Boyle’s law
B
Charles’s law
C
Dalton’s law
D
Gay-Lussac’s law
20

Which proportionality applies to Avogadro’s law?

A
Option
Option A
B
Option
Option B
C
Option
Option C
D
Option
Option D

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