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    Combined Science GCSE

    Proportions of gases by volume

    What Proportions of gases by volume means in Combined Science GCSE, as defined for AQA.

    Definitions of Proportions of gases by volume

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    Reference: AQA

    The atmospheric proportions are proportions by volume, and for gases this is effectively the same as the proportion by number of molecules.
    AQA · The proportions of different gases in the atmosphere (study guide)
    A proportion by volume, which for gases is effectively the same as proportion by number of molecules.
    AQA · The proportions of different gases in the atmosphere (study guide)

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