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Page 1

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Equations
Formulae
Molecular formula shows the number of atoms of each element in one molecule of the

substance

Molar mass mass of 1 mol of the substance, units g mol-1

Molar mass is found by adding together relative atomic masses

Empirical formula simplest whole number ratio of the atoms of…

Page 2

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Hydrated ionic compounds the number of water molecules is given by a full stop then

the number of water molecules after the ionic compounds formula

Molar mass of ionic compounds calculated the same way as molar masses of molecular

substances

Dissolving ionic substances water is polar so many ionic compounds…

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