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Combined Science
Key terms
Relative formula mass, Mᵣ

GCSE Combined Science · key term

Relative formula mass, Mᵣ

Definition

The sum of the relative atomic masses of all the atoms shown in a chemical formula. It has no units.

Used by OCR

How each exam board covers it

OCR GCSE Combined Science B · J260

Chemistry, Combined Science

Revise: Conservation of Mass, Relative Formula Mass and Moles

OCR Combined Science B past papers

Related key terms

Avogadro constant
Closed system
Conservation of mass
Molar mass
Mole

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Relative formula mass, Mᵣ — OCR GCSE Combined Science B Definition

Non-enclosed system

Relative atomic mass, Aᵣ