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GCSE Chemistry · key term
The amount of substance containing a specified number of particles; it is not a unit of mass.
Used by OCR
Specification C5.1d · Paper 2 (Foundation), Paper 4 (Higher)
Revise: Gas Volumes and MolesA mole measures an amount of substance. For a gas, that amount can be linked to the space it occupies. At the same temperature and pressure, one mole of any gas occupies approximately the same volume.
A mole measures amount of substance, not mass; different gases can have different masses but occupy the same volume per mole under the same conditions.
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