Chemistry (5070) Topic 1 · States of matter 1.2 Diffusion Practise diffusion in liquids and gases using kinetic particle theory, concentration differences, and the effect of relative molecular mass on the diffusion rate of gases. Key TheoryLearn FirstLoading… Common MistakesAvoid TheseLoading… StrategyApply ThisLoading… Practice 1EasyLoading… Practice 2EasyLoading… Practice 3MediumLoading… Practice 4MediumLoading… Practice 5AdvancedLoading…