WAEC Chemistry 2018 Objective — Question 35
Question 35 of 50 from the West African Examinations Council (WAEC) Chemistry 2018 Objective paper, with the correct answer and a full explanation.
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The empirical formula of a compound containing 0.067 mol Cu and 0.066 mol O is [Cu=63.5, O=16.0]
- A. Cu₂O
- B. CuOCorrect
- C. CuO₂
- D. Cu₂O₄
Explanation
Mole ratio Cu:O ≈ 0.067:0.066 ≈ 1:1, giving empirical formula CuO.
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