Post-UTME Chemistry 2011 Objective — Question 3
Question 3 of 10 from the Post-UTME Screening (Post-UTME) Chemistry 2011 Objective paper, with the correct answer and a full explanation.
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What is the partial pressure of hydrogen gas collected over water at a standard atmospheric pressure and 25°C, if the saturation vapour pressure of water is 23mm Hg at that temperature?
- A. 737mmHgCorrect
- B. 763mmHg
- C. 777mmHg
- D. 783mmHg
Explanation
Partial pressure of H2 = total pressure - vapour pressure of water = 760-23=737mmHg.
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