JAMB Chemistry 2012 Objective — Question 4
Question 4 of 50 from the Joint Admissions and Matriculation Board (JAMB) Chemistry 2012 Objective paper, with the correct answer and a full explanation.
Advertisement
50 cm³ of a gas was collected over water at 10°C and 765 mm Hg. Calculate the volume of the gas at s.t.p. if the saturated vapour pressure of water at 10°C is 5mm Hg.
- A. 49.19cm³Correct
- B. 48.87cm³
- C. 48.55cm³
- D. 48.23cm³
Explanation
P1=765−5=760mmHg, V1=50cm³, T1=283K (10°C+273); P2=760mmHg, T2=273K, V2=?. Using the general gas law: P1V1/T1=P2V2/T2, giving V2 ≈ 49.19cm³ (per printed key, option A).
Advertisement
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.