Waec Model Questions Vol1 2021 Chemistry Question 32

Practice objective / multiple choice question 32 from the 2021 Waec Model Questions Vol1 Chemistry examination.

Waec Model Questions Vol1 2021 Chemistry Objective / Multiple Choice Medium Difficulty
Question 32 WAEC_MODEL_QUESTIONS_VOL1 • 2021 • CHEMISTRY • objective

When 1.00 g of an unknown hydrocarbon is combusted completely in excess O₂, the products are 2.80 g of CO₂ and 1.20 g of H₂O. Determine the empirical formula of the hydrocarbon and the mass percent of carbon in the compound.

Answer Options

A. Empirical formula C₂H₃; mass percent C = 80.0 %
B. Empirical formula C₃H₆; mass percent C = 92.5 %
C. Empirical formula CH₃; mass percent C = 68.0 %
Correct Answer D. Empirical formula CH₂; mass percent C = 76.3 %
Correct Answer
D
Correct Option:
Empirical formula CH₂; mass percent C = 76.3 %

About This Question

This is Waec Model Questions Vol1 2021 Chemistry Question 32. It is one of the objective questions from the 2021 Waec Model Questions Vol1 Chemistry examination.

Difficulty level: Medium .

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