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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
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