Gce Model Questions Vol1 2021 Chemistry Question 21

Practice objective / multiple choice question 21 from the 2021 Gce Model Questions Vol1 Chemistry examination.

Gce Model Questions Vol1 2021 Chemistry Objective / Multiple Choice Medium Difficulty
Question 21 GCE_MODEL_QUESTIONS_VOL1 • 2021 • CHEMISTRY • objective

A 2.00 g sample of a hydrocarbon CxHy is combusted completely, producing 44.8 g of \(\ce{CO2}\) and 18.0 g of \(\ce{H2O}\). The molar mass of the hydrocarbon is known to be 58 g\,mol\(^{-1}\). Determine the molecular formula of the hydrocarbon and calculate its mass percent of carbon.

Answer Options

A. Molecular formula \(\ce{C4H6}\); mass percent C ≈ 88.9 %
B. Molecular formula \(\ce{C3H6}\); mass percent C ≈ 85.7 %
C. Molecular formula \(\ce{C4H10}\); mass percent C ≈ 82.7 %
Correct Answer D. Molecular formula \(\ce{C4H8}\); mass percent C ≈ 82.8 %
Correct Answer
D
Correct Option:
Molecular formula \(\ce{C4H8}\); mass percent C ≈ 82.8 %

About This Question

This is Gce Model Questions Vol1 2021 Chemistry Question 21. It is one of the objective questions from the 2021 Gce Model Questions Vol1 Chemistry examination.

Difficulty level: Medium .

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