O-LevelChemistryStoichiometry5070/12 · May/June 2019 · Q121 Mark

3.0 dm³ of sulfur dioxide is reacted with 2.0 dm³ of oxygen. 2SO2(g) + O2(g) → 2SO3(g) Assuming the reaction goes to completion and that all gases are at room temperature and pressure, which volume of sulfur trioxide is formed?

A2.0 dm³

B3.0 dm³

C4.0 dm³

D5.0 dm³

✓ Correct answer

B: 3.0 dm³

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Topic: Stoichiometry, O-Level Chemistry (syllabus 5070). Multiple choice, 1 mark.
Source: O-Level Chemistry, May/June 2019 Paper 1 Variant 2, question 12.

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