O-LevelChemistryStoichiometry5070/11 · May/June 2015 · Q121 Mark

1.00 dm³ of ammonia gas is passed over heated copper(II) oxide. 3CuO(s) + 2NH₃(g) → 3Cu(s) + N₂(g) + 3H₂O(l) What is the volume of nitrogen formed when measured at the same temperature and pressure as the ammonia?

A0.25 dm³

B0.50 dm³

C1.00 dm³

D2.00 dm³

✓ Correct answer

B: 0.50 dm³

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Topic: Stoichiometry, O-Level Chemistry (syllabus 5070). Multiple choice, 1 mark.
Source: O-Level Chemistry, May/June 2015 Paper 1 Variant 1, question 12.

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