JAMB Mathematics 2022 Objective — Question 31

Question 31 of 41 from the Joint Admissions and Matriculation Board (JAMB) Mathematics 2022 Objective paper, with the correct answer and a full explanation.

S.V.P of H₂O at 10°C = 5 mmHg. 50 cm³ of gas collected over water at 10°C and 765 mmHg. Volume at STP?

A. 48.55 cm³
B. 48.23 cm³Correct
C. 49.19 cm³
D. 50.59 cm³

Explanation

Dry gas pressure = 765 − 5 = 760 mmHg. At STP (273K, 760 mmHg): V₂ = V₁T₂/T₁ = (50 × 273)/283 = 48.23 cm³.

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