O-LevelChemistryStoichiometry5070/11 · May/June 2015 · Q251 Mark

Using the Periodic Table for the relative atomic masses, which has the least mass?

A0.1 moles of silicon dioxide, SiO₂

B0.5 moles of oxygen, O₂

C0.5 moles of lithium, Li

D1.0 moles of ammonia, NH₃

✓ Correct answer

C: 0.5 moles of lithium, Li

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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 25.

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