Chemistry GCSE
Molar mass
What Molar mass means in Chemistry GCSE, as defined for AQA.
Definitions of Molar mass
Exam boards and our study guides word this term in slightly different ways. Learn the version your board uses.
Check what you remember
Read the wording for your board, then hide it and explain Molar mass in your own words. Rough notes are fine. This is a self-check, with no mark or grade.
Reference: AQA
The mass of one mole of a substance, found by adding the relative atomic masses in the formula and expressed in g/mol.
The Ar or Mr of a substance, by which its mass is divided to convert that mass into moles.
Topics that use Molar mass
- Moles (HT only) (AQA GCSE)
- Using moles to balance equations (HT only) (AQA GCSE)
Related terms
- Balanced equations
- Conservation of mass
- Electron counting
- Mass–mole conversions
- Mole
- Mole as the amount unit
- Mole calculations
- Mole concept
Using Molar mass in the exam
Check the command word and mark scheme for your exact question. After comparing your explanation with the reference, use the term in an answer on the linked topic. This practice does not predict an exam mark.
Practise Chemistry questions
Create a free account to answer exam-style questions on this topic and get feedback on your answers.
Start free
All Chemistry GCSE termsA week of Premium from your first lesson · Then the free plan continues · No card, no charge