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O-LevelChemistryStoichiometry5070/11 · Oct/Nov 2017 · Q111 Mark

The empirical formula of a liquid compound is C₂H₄O. To find the empirical formula, it is necessary to know

Athe density of the compound.
Bthe percentage composition by mass of the compound.
Cthe relative molecular mass of the compound.
Dthe volume occupied by 1 mole of the compound.

✓ Correct answer

B: the percentage composition by mass of the compound.

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About this question

Topic
Stoichiometry, O-Level Chemistry (syllabus 5070). Multiple choice, 1 mark.
Source
O-Level Chemistry, Oct/Nov 2017 Paper 1 Variant 1, question 11.

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