GCSE chemistry calculations practice (combined science)

GCSE chemistry calculations practice (combined science): 15 questions, marked instantly with every answer explained. Free, no sign-up, no adverts in the test.

Before you start

Calculation practice for GCSE combined science chemistry: relative formula mass, percentage by mass, conservation of mass, concentration in g/dm³, Rf values and mean rate of reaction. Relative atomic masses are always given. Questions marked "Higher tier" (moles) are Higher-tier content in most exam boards’ specifications – check yours. 15 questions are picked each time.

15 questions – a new mix each time you try

Choose how to do it Test – answers and explanations at the end; no time limit Practice – see the answer after each question; no time limit

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Classfern practice material. Not an official test and not affiliated with or endorsed by the Department for Education, Ofqual or any exam board. Written by Classfern for practice. Not affiliated with or endorsed by any exam board, testing agency, school district or government department.

Contains public sector information licensed under the Open Government Licence v3.0. Equations and content from: Department for Education, GCSE combined science subject content (DFE-00351-2014), © Crown copyright. Curriculum statements from: Department for Education, National curriculum in England: science programmes of study, © Crown copyright.

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