WAEC Chemistry 2018 Objective — Question 39
Question 39 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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Analysis of a hydrocarbon shows that it contains 0.93g of carbon per gram of the compound. The mole ratio of carbon to hydrogen in the compound is [H=1.0, C=12.0]
- A. 1:1Correct
- B. 1:2
- C. 2:1
- D. 2:3
Explanation
Carbon = 0.93g, Hydrogen = 1−0.93 = 0.07g. Moles: C=0.93/12≈0.0775, H=0.07/1=0.07. Ratio ≈ 1:1.
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