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    Combined Science GCSE

    Percentage composition

    What Percentage composition means in Combined Science GCSE, as defined for AQA.

    Definition of Percentage composition

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    Reference: AQA

    The fraction of a compound's mass contributed by a particular element, found by dividing the element's total mass by the compound's relative formula mass and multiplying by 100.
    AQA · Relative formula mass (study guide)

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    Using Percentage composition in the exam

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