Neco 2019 Chemistry Question 13

Practice objective / multiple choice question 13 from the 2019 Neco Chemistry examination.

Neco 2019 Chemistry Objective / Multiple Choice Medium Difficulty
Question 13 NECO • 2019 • CHEMISTRY • objective

An unknown alkane is completely combusted. From 5.00 g of the alkane, 14.6 g of \( \text{CO}_2 \) and 9.0 g of \( \text{H}_2\text{O} \) are obtained. Determine the molecular formula of the alkane and calculate its molar mass (to one decimal place).

Answer Options

A. C₄H₁₀, molar mass ≈ 58.1 g·mol⁻¹
Correct Answer B. C₂H₆, molar mass ≈ 30.1 g·mol⁻¹
C. C₅H₁₂, molar mass ≈ 72.1 g·mol⁻¹
D. C₃H₈, molar mass ≈ 44.1 g·mol⁻¹
Correct Answer
B
Correct Option:
C₂H₆, molar mass ≈ 30.1 g·mol⁻¹

About This Question

This is Neco 2019 Chemistry Question 13. It is one of the objective questions from the 2019 Neco Chemistry examination.

Difficulty level: Medium .

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