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Cambridge IGCSE Chemistry practice

Paper 4 structured question: Diffusion

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Diffusion

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Paper 4Theory (Extended)1 marks

The diffusion of gases is an important concept in chemistry, particularly in understanding how different gases behave under various conditions.

Description

Diffusion of Gases

Consider two gases, A and B. Gas A has a molecular mass of 2 g/mol, while gas B has a molecular mass of 32 g/mol. Both gases are at the same temperature and pressure.

  1. a

    State the relationship between molecular mass and the rate of diffusion of gases.

    Aim for approximately 1 distinct marking point.

    [1]

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Paper 4 structured question: Diffusion

Paper 4Theory (Extended)3 marks

Description

Gas Diffusion Rates

Gas A has a molecular mass of 4 g/mol and gas B has a molecular mass of 28 g/mol. Compare their diffusion rates.

  1. a

    Explain how the molecular mass affects the diffusion rates of gas A and gas B.

    Aim for approximately 3 distinct marking points.

    [3]