WAEC Chemistry 2025 Theory — Question 51

Question 51 of 70 from the West African Examinations Council (WAEC) Chemistry 2025 Theory paper, with the correct answer and a full explanation.

5(a)(iii). Give the reason why the gases mentioned in 5(a)(ii) would diffuse at the same rate.

Model answer

This is because they have the same/similar molecular weight (CO = 12+16 = 28 g/mol; N2 = 14x2 = 28 g/mol).

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