Post-UTME Chemistry 2008 Objective — Question 3
Question 3 of 16 from the Post-UTME Screening (Post-UTME) Chemistry 2008 Objective paper, with the correct answer and a full explanation.
Advertisement
A mixture of 0.20 mole of Ar, 0.20 mole of Ne and 0.30 mole of He exerts a total pressure of 2.1 atmosphere. What is the partial pressure of He in the mixture?
- A. 0.70 atmosphere
- B. 0.80 atmosphere
- C. 0.90 atmosphereCorrect
- D. 0.65 atmosphere
Explanation
Mole fraction He = 0.30/0.70 = 0.4286. Partial pressure = 0.4286 x 2.1 = 0.90 atmosphere.
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.