Chemistry · Oct / Nov 2017 · Paper 12 · Question 9
5070The mole and the Avogadro constant
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.
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Correct answer: B. the percentage composition by mass of the compound.
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