AnswersWA-Chemistry AUnit Test

Unit Test Answers

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atm

Answer:

3.0 atm

2
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What is the final volume of the balloon after it has been placed in the hot room? L

Answer:

2.1

3

3. Click on the bucket to reduce the temperature to approximately 200 K (−73°C). What happened to the pressure? Approximately what pressure did you observe?

A
decreased
B
increased
C
stayed the same
4

3. Click on the bucket to reduce the temperature to approximately 200 K (−73°C). What happened to the pressure? Approximately what pressure did you observe?

A
3.5–4.3 atm
B
5.4–6.2 atm
C
7.5–8.3 atm
5

4. What gas law mathematically shows the relationships between temperature and pressure?

A
Boyle’s law
B
Charles’s law
C
Gay-Lussac’s law
6

Assume that temperature and number of moles of gas are constant in this problem. Use the graph to complete the statement below. This graph shows that pressure and volume have .

A
a direct linear relationship
B
an inverse linear relationship
C
a direct nonlinear relationship
D
an inverse nonlinear relationship
7

How will the volume of the air bubble change?

A
It will increase.
B
It will decrease.
C
It will stay the same.
8

What is the volume of the air bubble when it reaches the surface? Type in the answer using the correct number of significant figures. mL

Answer:

15

9

L

Answer:

1.1 L

10

How does the volume of the balloon change after moving it to the hot room?

A
increases
B
decreases
C
stays the same
11

How does the tire pressure change in response to the temperature change?

A
increases
B
decreases
C
stays the same
12

What is the new pressure of the tire after the temperature change? atm

Answer:

2.65

13

2. Click on the bucket to raise the temperature of the container to approximately 400 K (127°C). What happened to the pressure? Approximately what pressure range did you observe?

A
decreased
B
increased
C
stayed the same
14

Numerator (A):

A
P1V1T2
B
P2V2T1
C
P1V1
15

Denominator (B):

A
P1V1T2
B
P2V2T1
C
T1V2
D
P1V1
16

Numerator (A):

A
P1V1T2
B
P2V2T1
C
P1V1
17

atm

Answer:

0.95 atm

18

Weather balloons carry instruments that can gather data about Earth’s atmosphere. On the ground, a weather balloon has a volume of 250. L, a pressure of 755 mmHg, and a temperature of 25.0°C. As the balloon ascends into the atmosphere, the temperature decreases to 22.0°C and the pressure changes to 710. mmHg. What is the new volume of the weather balloon? Type in your answer using the correct number of significant figures. L

Answer:

263

19

What is the total pressure inside the cylinder? atm

Answer:

6.7

20

2. Click on the bucket to raise the temperature of the container to approximately 400 K (127°C). What happened to the pressure? Approximately what pressure range did you observe?

A
3.5–4.3 atm
B
5.4–6.2 atm
C
7.5–8.3 atm

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