A-LevelChemistryAtoms, molecules and stoichiometry9701/12 · May/June 2017 · Q21 Mark

Which would contain 9.03 × 10²³ oxygen atoms?

A0.25 mol aluminium oxide

B0.75 mol sulfur dioxide

C1.5 mol sulfur trioxide

D3.0 mol water

✓ Correct answer

B: 0.75 mol sulfur dioxide

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Topic: Atoms, molecules and stoichiometry, A-Level Chemistry (syllabus 9701). Multiple choice, 1 mark.
Source: A-Level Chemistry, May/June 2017 Paper 1 Variant 2, question 2.

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