Gas Volumes in Balanced Reactions Worksheet

Question 1

Which condition allows balanced mole ratios to be used directly as ratios of gas volumes?

1. The gas volumes are compared at the same temperature and pressure.
2. All gases have the same molar mass.
3. The gases have the same color.
4. Every gas has a different pressure.

Question 2

Use 2CO(g) + O₂(g) → 2CO₂(g). What volume of CO₂ can form from 8.0 L CO with excess oxygen at the same temperature and pressure?

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Question 3

For N₂(g) + 3H₂(g) → 2NH₃(g), what volume ratio of H₂ to N₂ is required under matched conditions?

1. 1:3
2. 1:2
3. 2:1
4. 3:1

Question 4

Explain why the volume ratio from a balanced equation cannot be applied directly if reactant and product volumes are reported at different pressures.

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Question 5

What volume of NH₃ can theoretically form in P?

1. 2.0 L
2. 3.0 L
3. 4.0 L
4. 6.0 L

Question 6

Calculate the volume of N₂ consumed in Q. Show the gas-volume ratio.

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Question 7

How does the theoretical NH₃ volume in R compare with that in P?

1. It is half as large.
2. It is the same.
3. It is twice as large.
4. It is three times as large.

Question 8

Explain why the table is sufficient to find the theoretical NH₃ volumes even though it gives no exact starting volumes for N₂.

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