O-LevelChemistryStoichiometry5070/11 · May/June 2011 · Q121 Mark

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

Adensity of the compound.

Bpercentage composition of the compound.

Crelative molecular mass of the compound.

Dvolume occupied by 1 mole of the compound.

✓ Correct answer

B: percentage composition of the compound.

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Topic: Stoichiometry, O-Level Chemistry (syllabus 5070). Multiple choice, 1 mark.
Source: O-Level Chemistry, May/June 2011 Paper 1 Variant 1, question 12.

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