WAEC Chemistry 2019 Objective — Question 11
Question 11 of 50 from the West African Examinations Council (WAEC) Chemistry 2019 Objective paper, with the correct answer and a full explanation.
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How many moles of carbon(IV) oxide contain 16.0 g of oxygen? [C=12.0, O=16.0]
- A. 0.20 mol
- B. 0.25 mol
- C. 0.40 mol
- D. 0.50 molCorrect
Explanation
1 mole of CO2 contains 32 g of oxygen (2 × 16). Therefore 16 g of oxygen is contained in 0.5 mole of CO2.
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