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O-LevelChemistryStoichiometry5070/12 · May/June 2023 · Q111 Mark

Which compound contains 45.2% nitrogen by mass? [Ar: C, 12; H, 1; N, 14]

Aethane-1,2-diamine, NH2C2H4NH2
Bhydroxylamine, NH2OH
Cmethanamide, HCONH2
Dmethylamine, CH3NH2

✓ Correct answer

D: methylamine, CH3NH2

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About this question

Topic
Stoichiometry, O-Level Chemistry (syllabus 5070). Multiple choice, 1 mark.
Source
O-Level Chemistry, May/June 2023 Paper 1 Variant 2, question 11.

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