AnswersTX-Chemistry BUnit Test

Unit Test — Unit test Answers

25 verified answers1 views
1
Free Preview

A thin-walled plastic bottle is sealed at an altitude of 19,000 feet. What would happen to this bottle if it is carried down to 1,000 feet?

A
It will shrink and collapse.
B
It will expand and burst.
C
It will expand but will not burst.
D
It will shrink but maintain its shape.
2
Free Preview

Which best defines pressure?

A
a measure of the number of particles in a unit area
B
a measure of the force of the collision of particles on a unit area
C
a measure of the number of particles on the outside of a container
D
a measure of the force of the collision of particles on the inside of a container
3

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
4

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
5

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
6

The particles of a gas inside a balloon are experiencing an increase in their average kinetic energy and the number of collisions with the wall of the balloon. What is the most likely outcome?

A
higher gas pressure inside the balloon
B
higher air pressure outside the balloon
C
a decrease in gas temperature inside the balloon
D
a large increase in air temperature outside the balloon
7

A perfume bottle is dropped in the corner of a room and it shattered. The odor of the perfume can be detected on the other side of the room. Which statement best describes this observation?

A
Particles are moving from regions of high concentration to low concentration.
B
Particles are moving from regions of low concentration to high concentration.
C
Particles are moving through a small opening into a smaller volume.
D
Particles are moving through a small opening into a larger volume.
8

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.
9

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.
10

Bromine gas in a container is heated over a flame. What happens to the average kinetic energy of the bromine particles?

A
It decreases rapidly.
B
It increases quickly.
C
It remains the same.
D
It decreases slowly.
11

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
12

According to the kinetic-molecular theory, the average kinetic energy of gas particles depends on which factor?

A
volume
B
pressure
C
temperature
D
number of particles
13

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.
14

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
15

Which change would increase the pressure exerted by a gas?

A
removing gas molecules from the container
B
transferring the gas to a larger container
C
raising the temperature of the gas
D
reducing the force of the molecules hitting the container
16

How many kPa are in 2,150 mmHg?

A
2.83 kPa
B
287 kPa
C
1.61 ´ 104 kPa
D
2.18 ´ 105 kPa
17

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
18

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
19

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
20

best

Increasing the temperature of a gas decreases the pressure.
Option
Increasing the temperature of a gas increases the pressure.
Option
Increasing the pressure on a gas decreases the volume.
Option
Increasing the pressure on a gas increases the volume.
Option

Did you find these answers helpful?

More from this Course

Quiz
25 verified answers

Energy

Quiz
25 verified answers

The Nucleus

Quiz
25 verified answers

Cumulative Exam