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GCSE Chemistry · key term
The relative mass of the particle being counted, found from the relative atomic masses of the atoms in its formula. It has no unit.
Used by Edexcel
Specification 1.50 · Paper 1, Paper 2
Revise: Mole DefinitionThe mass of one mole in grams has the same numerical value as the relative particle mass. For an atom, use its relative atomic mass. For a molecule or formula unit, add the relative atomic masses of all the atoms shown in its formula.
Give the mass of one mole in grams; relative particle mass itself has no unit.
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