Post-UTME Chemistry 2017 Objective — Question 1
Question 1 of 20 from the Post-UTME Screening (Post-UTME) Chemistry 2017 Objective paper, with the correct answer and a full explanation.
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120cm3 of hydrogen were sparked with 60cm3 of oxygen at 110 degrees C. What was the volume of steam produced? 2H2(g)+O2(g) -> 2H2O(g)
- A. 30cm3
- B. 60cm3
- C. 90cm3
- D. 120cm3Correct
Explanation
O2 (60cm3) is the limiting/matching reagent for 120cm3 H2 (2:1 ratio); by the 2:2 mole ratio of H2:H2O, 120cm3 H2 gives 120cm3 steam.
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