Post-UTME Chemistry 2005 Objective — Question 9
Question 9 of 27 from the Post-UTME Screening (Post-UTME) Chemistry 2005 Objective paper, with the correct answer and a full explanation.
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According to the balanced equation below, which gas is in excess and by how much? H2(g) + F2(g) -> 2HF(g); 50dm^3, 60dm^3
- A. F is in excess by 6dm^3
- B. F is in excess by 10dm^3Correct
- C. H is in excess by 10dm^3
- D. HF is in excess by 100dm^3
Explanation
The reaction is 1:1; with 50dm^3 H2 and 60dm^3 F2, F2 is in excess by 60-50=10dm^3.
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