Gas Laws Round 2

Question 1

If 20.0 g of C₂H₆ combusts, what is the volume of CO₂ produced at STP?

Answer 1

33.6 L CO₂.

Question 2

How many grams of CO₂ are produced when 22.0 g of CH₄ burns in excess oxygen?

Answer 2

44.0 g CO₂.

Question 3

How many liters of O₂ are required to completely react with 10.0 g of CH₄ at STP?

Answer 3

22.4 L O₂.

Question 4

How many grams of H₂O form from 10.0 g of O₂ reacting with H₂?

Answer 4

11.25 g H₂O.

Question 5

If 2.5 moles of H₂ react with 1 mole of O₂, what is the theoretical yield of H₂O in grams?

Answer 5

36.0 g H₂O.

Question 6

What volume of NH₃ is produced from 3.0 moles of H₂ reacting with N₂ at STP?

Answer 6

22.4 L NH₃.

Question 7

Determine the mass of sodium needed to produce 5.0 L of H₂ at STP when reacting with H₂O.

Answer 7

5.75 g Na.

Question 8

What is the volume of H₂ produced at STP from the reaction of 5.0 g of Mg with HCl?

Answer 8

Answer: 2.06 L H₂.

Question 9

How many grams of CaCO₃ are needed to produce 5.0 L of CO₂ at STP?

Answer 9

22.2 g CaCO₃.

Question 10

Calculate the moles of NH₃ that can be produced from 10.0 g of N₂ in the Haber process.

Answer 10

0.714 moles NH₃.

Question 11

What is the limiting reactant if 2.0 moles of H₂ reacts with 1.0 mole of O₂?

Answer 11

H₂.

Question 12

Balance the combustion reaction of methane (CH₄) with oxygen.

Answer 12

CH₄ + 2 O₂ → CO₂ + 2 H₂O.

Question 13

How many grams of H₂O are produced when 1 mole of C₆H₁₂ burns in excess oxygen?

Answer 13

108 g H₂O.

Question 14

If 4.0 g of H₂ reacts with oxygen, how many moles of H₂O are produced?

Answer 14

2 moles.

Question 15

Calculate the volume of CO₂ produced from the combustion of 1 mole of propane (C₃H₈) at STP.

Answer 15

67.2 L CO₂.

Question 16

What is the pressure of 0.25 moles of gas in a 1.0 L container at 273 K?

Answer 16

5.60 atm.

Question 17

What is the pressure of 2.0 moles of gas in a 5.0 L container at 300 K?

Answer 17

9.87 atm.

Question 18

What is the pressure of 2.0 moles of gas in a 5.0 L container at 300 K?

Answer 18

9.87 atm.

Question 19

Calculate the temperature of a gas if 1.5 moles in a 10.0 L container has a pressure of 2.5 atm.

Answer 19

203 K.

Question 20

How many moles of gas are in a 4.0 L container at 1.0 atm and 298 K?

Answer 20

0.163 moles.

Question 21

What is the volume occupied by 0.5 moles of gas at STP?

Answer 21

11.2 L.

Question 22

Determine the mass of O₂ needed to fill a 2.0 L balloon at 1.0 atm and 298 K.

Answer 22

2.61 g O₂.

Question 23

If a gas is initially at 300 K and 1.0 atm with a volume of 2.0 L, what is the new volume at 600 K?

Answer 23

4.0 L.

Question 24

Calculate the final pressure if a 5.0 L gas at 300 K is compressed to 2.5 L at constant temperature.

Answer 24

2.0 atm.

Question 25

What is the final volume of 3.0 L of gas at 250 K when the temperature is increased to 500 K at constant pressure?

Answer 25

6.0 L

Question 26

If 4.0 moles of gas at 2.0 atm occupies 10.0 L, what is the temperature?

Answer 26

610 K.