JAMB Chemistry 2023 Objective — Question 31

Question 31 of 40 from the Joint Admissions and Matriculation Board (JAMB) Chemistry 2023 Objective paper, with the correct answer and a full explanation.

50 cm³ of gas was collected over water at 10°C and 765 mmHg. Calculate the volume at STP if the SVP of water at 10°C is 5 mmHg.

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

Explanation

Actual pressure of gas = 765 − 5 = 760 mmHg. At STP: T₁=283 K, V₁=50 cm³, P₁=760 mmHg; T₂=273 K, P₂=760 mmHg. V₂ = (50 × 273)/283 = 48.23 cm³.

Sign up free to unlock

Score tracking
Practice history
Saved questions
Progress dashboard
Personalized sessions
Weak-topic breakdown

…and/or go further with premium services and No Ads.

Create free account

More questions from Chemistry 2023 Objective More Chemistry past papers