Key term for OCR GCSE Chemistry A, used in Purity and separating mixtures.
The average mass of a simple covalent molecule compared with 1/12th of the mass of an atom of carbon-12.
Relative molecular mass (Mᵣ) appears in OCR GCSE Chemistry A revision content for Elements, compounds and mixtures, especially Purity and separating mixtures and Relative Formula Mass.
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