Post-UTME Chemistry 2010 Objective — Question 3
Question 3 of 10 from the Post-UTME Screening (Post-UTME) Chemistry 2010 Objective paper, with the correct answer and a full explanation.
Advertisement
A mixture contains 20cm³ of hydrogen, 35cm³ of oxygen, 15cm³ of carbon dioxide and 10cm³ of nitrogen at S.T.P, which of the following gives the mole fraction of hydrogen in this mixture?
- A. 0.02
- B. 0.16
- C. 0.20
- D. 0.25Correct
Explanation
Total volume=20+35+15+10=80cm³; mole fraction of H2=20/80=0.25.
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.