Question 1

What is the volume of 2 moles of a gas at 25 degrees Celsius and 1.5 atm?

Hint: PV=nRT

Hint: Convert °C to K

Accepted Answer

32.6 L

Answer

15.4 L

Answer

0.067 L

Answer

1.82 L

Question 2

What is the number of moles of a gas in a 5 L container at 1.2 atm and 27 degrees Celsius?

Hint: PV=nRT

Hint: Convert °C to K

Accepted Answer

0.23 mol

Answer

2.33 mol

Answer

0.12 mol

Answer

0.46 mol

Question 3

What is the pressure of a gas at 25 degrees Celsius and 2 L volume with 0.5 moles of gas?

Hint: PV=nRT

Hint: Convert °C to K

Accepted Answer

6.11 atm

Answer

0.25 atm

Answer

2.0 atm

Answer

0.533 atm

Question 4

What is the temperature of 2 moles of gas in a 10 L container at 1 atm?

Hint: PV=nRT

Accepted Answer

60.9K

Answer

546°C

Answer

54.6 K

Answer

10 K

Question 5

What is the volume of 1 mole of gas at STP?

Accepted Answer

22.4 L

Answer

1 L

Answer

2.4 L

Answer

0.1 L

Question 6

What is the relationship between pressure and volume, when temperature is kept constant?

Accepted Answer

inverse

Answer

direct

Answer

random

Answer

none of the above

Question 7

What is the relationship between temperature and volume, when pressure is kept constant?

Accepted Answer

direct

Answer

none of the above

Answer

inverse

Answer

random

Question 8

What is the relationship between pressure and temperature, when volume is kept constant?

Accepted Answer

direct

Answer

inverse

Answer

random

Answer

none of the above

Question 9

What is the ideal gas law?

Accepted Answer

PV=nRT

Answer

PV=k

Answer

P=n/V

Answer

V=nRT/P

Question 10

What is the volume of a gas that occupies 2 L at 1 atm if the pressure is increased to 3 atm?

Hint: P₁V₁=P₂V₂

Accepted Answer

0.67 litres

Answer

3 litres

Answer

1.5 litres

Answer

2 litres

Question 11

What is the pressure of a gas that occupies 10 L at 2 atm if the volume is decreased to 5 L?

Hint: P₁V₁=P₂V₂

Accepted Answer

4 atm

Answer

8 atm

Answer

2 atm

Answer

1 atm

Question 12

A gas at 25°C and 2.5 L has a volume of 3.5 L at what temperature?

Hint: V₁/T₁ = V₂/T₂

Hint: Convert °C to K

Accepted Answer

417 K

Answer

455 K

Answer

380 K

Answer

485 K

Question 13

What is the volume of gas at 20°C, if its original volume was 2 L at 0°C?

Hint: V₁/T₁ =V₂/T₂

Hint: Convert °C to K

Accepted Answer

2.1 L

Answer

1.9 L

Answer

1.5 L

Answer

1.7 L

Question 14

If the pressure of a gas is 3 atm at 300 K, what will be the pressure if the temperature is increased to 350 K at constant volume?

Hint: P₁/T₁ = P₂/T₂

Accepted Answer

3.5 atm

Answer

2.5 atm

Answer

3.0 atm

Answer

4.0 atm

Question 15

A gas has a volume of 500 mL at 1 atm. If the pressure is decreased to 0.5 atm, what is the new volume?

Hint: P₁V₁=P₂V₂

Accepted Answer

1000 mL

Answer

250 mL

Answer

2000 mL

Answer

750 mL

Question 16

A gas has a volume of 2.00 L at 1.50 atm. If the pressure is decreased to 0.75 atm, what is the new volume?

Hint: P₁V₁=P₂V₂

Accepted Answer

4.00 L

Answer

3.00 L

Answer

8.00 L

Answer

1.00 L

Question 17

If O₂ occupies a container with a volume of 15L, how many moles of O₂ is this at STP?

Accepted Answer

0.670 moles of O₂

Answer

15.0 moles of O₂

Answer

3.88 moles of O₂

Answer

1.26 moles of O₂

Question 18

A balloon with a volume of 15L contains 3 moles of an ideal gas. What would be the new volume of the balloon if 12 moles of gas now occupies the balloon at constant temperature and pressure?

Hint: V₁/n₁ = V₂/n₂

Accepted Answer

60L

Answer

20L

Answer

10L

Answer

40L

Question 19

A balloon containing 20 moles of of an ideal gas with a volume of 10L, is reduced to 5L at constant temperature and pressure. How many moles of gas now occupies the balloon?

Hint: V₁/n₁ = V₂/n₂

Accepted Answer

10 moles

Answer

2 moles

Answer

5 moles

Answer

15 moles

Question 20

What is the relationship between moles of gas and volume?

Accepted Answer

As the number of gas moles, increase the volume also increases

Answer

As the number of gas moles, increase the volume stays the same

Answer

As the number of gas moles, increase the volume decreases

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