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Empirical and molecular formula

Physical

AS

Amount of Substance

AQA Content

calculate empirical formula from data giving composition by mass or percentage by mass
calculate molecular formula from the empirical formula and relative molecular mass.

Specification Notes

Empirical formula is the simplest whole number ratio of atoms of each element in a compound.
Molecular formula is the actual number of atoms of each element in a compound.
The relationship between empirical formula and molecular formula.

Notes

Links

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