JAMB Chemistry 2019 Objective — Question 12
Question 12 of 40 from the Joint Admissions and Matriculation Board (JAMB) Chemistry 2019 Objective paper, with the correct answer and a full explanation.
Advertisement
A gas X diffuses twice as fast as a gas Y. If the relative molecular mass of Y is 112, calculate the relative molecular mass of X
- A. 28Correct
- B. 14
- C. 56
- D. 120
Explanation
By Graham's law: dₓ/dᵧ = √(R.M.Mᵧ/R.M.Mₓ). Given dₓ=2dᵧ: 2 = √(112/R.M.Mₓ) ⇒ 4 = 112/R.M.Mₓ ⇒ R.M.Mₓ = 112/4 = 28.
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.