O-LevelChemistryStoichiometry5070/12 · May/June 2015 · Q111 Mark

Ammonia is manufactured from nitrogen and hydrogen by the Haber process. N₂(g) + 3H₂(g) ⇌ 2NH₃(g) What is the percentage yield when 60 kg of ammonia is produced from 60 kg of hydrogen?

A5.9%

B17.6%

C35.3%

D50.0%

✓ Correct answer

B: 17.6%

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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 2, question 11.

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