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Every question is written against the published AQA GCSE Chemistry syllabus and reviewed for accuracy before being added to the bank. We match the command words (state, describe, explain, evaluate), mark allocations, and difficulty tier you'll see on real AQA past papers. Explanations are written in the style of official examiner mark schemes so students learn exactly what marks are being awarded for.

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AQA · GCSE · Chemistry

One real Chemistry question.
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Topic: The rate and extent of chemical change: calculating rates of reaction. Pick an answer — get the mark scheme instantly.

Question · Difficulty 2/3

Mean rate of reaction = quantity of reactant used (or product formed) ÷:

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One real Chemistry question.No signup. 30 seconds.

One real Chemistry question.
No signup. 30 seconds.