O-LevelChemistryStoichiometry5070/11 · Oct/Nov 2020 · Q131 Mark

Which contains the greatest mass of oxygen?

A0.2 mol of aluminium nitrate, Al(NO3)3

B0.3 mol of potassium sulfate, K2SO4

C0.4 mol of sodium nitrate, NaNO3

D0.5 mol of magnesium carbonate, MgCO3

✓ Correct answer

A: 0.2 mol of aluminium nitrate, Al(NO3)3

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Topic: Stoichiometry, O-Level Chemistry (syllabus 5070). Multiple choice, 1 mark.
Source: O-Level Chemistry, Oct/Nov 2020 Paper 1 Variant 1, question 13.

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