WAEC Chemistry 2014 Objective — Question 43
Question 43 of 50 from the West African Examinations Council (WAEC) Chemistry 2014 Objective paper, with the correct answer and a full explanation.
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C₂H₄+3O₂(g)→2CO₂(g)+2H₂O(l). How many moles of ethene would be burnt to produce 0.1 mole of water?
- A. 0.05 moleCorrect
- B. 0.10 mole
- C. 0.20 mole
- D. 2.00 moles
Explanation
From the equation, 1 mole C2H4 produces 2 moles H2O. So to produce 0.1 mole H2O, moles of C2H4 = 0.1/2 = 0.05 mole.
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