O-LevelChemistryStoichiometry5070/11 · May/June 2018 · Q241 Mark

What are the percentages by mass of nitrogen in ammonium nitrate, NH₄NO₃, and in calcium nitrate, Ca(NO₃)₂? % nitrogen in NH₄NO₃ % nitrogen in Ca(NO₃)₂ A 18 14 B 18 17 C 35 9 D 35 17

A18, 14

B18, 17

C35, 9

D35, 17

✓ Correct answer

D: 35, 17

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Topic: Stoichiometry, O-Level Chemistry (syllabus 5070). Multiple choice, 1 mark.
Source: O-Level Chemistry, May/June 2018 Paper 1 Variant 1, question 24.

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