Waec Model Questions Vol1 2025 Chemistry Question 11
Practice objective / multiple choice question 11 from the 2025 Waec Model Questions Vol1 Chemistry examination.
A 20.0 g sample of an unknown hydrocarbon is combusted completely in excess oxygen, producing 66.0 g of CO₂ and 27.0 g of H₂O. The hydrocarbon is known to have a molar mass of 112 g·mol⁻¹. (a) Determine its empirical formula. (b) Write its molecular formula. (c) Calculate the volume of O₂ gas at STP required for the complete combustion of 1.00 mol of this hydrocarbon.
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This is Waec Model Questions Vol1 2025 Chemistry Question 11. It is one of the objective questions from the 2025 Waec Model Questions Vol1 Chemistry examination.
Difficulty level: Hard .
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