WAEC Chemistry 2021 Theory — Question 5

Question 5 of 31 from the West African Examinations Council (WAEC) Chemistry 2021 Theory paper, with the correct answer and a full explanation.

1(e). State Graham's law of diffusion.

Model answer

Graham's law states that the rate of diffusion of a gas (at constant temperature and pressure) is inversely proportional to the square root of its density (or molar mass).

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