Neco Model Questions Vol1 2020 Chemistry Question 41

Practice objective / multiple choice question 41 from the 2020 Neco Model Questions Vol1 Chemistry examination.

Neco Model Questions Vol1 2020 Chemistry Objective / Multiple Choice Medium Difficulty
Question 41 NECO_MODEL_QUESTIONS_VOL1 • 2020 • CHEMISTRY • objective

A 10.0 g sample of an unknown organic compound containing only carbon, hydrogen and oxygen is completely combusted. The combustion yields 20.0 g of \( \mathrm{CO_2} \) and 8.2 g of \( \mathrm{H_2O} \). (a) Determine the empirical formula of the compound. (b) The compound is known to be an ester whose molecular formula can be written as \( \mathrm{C_nH_{2n}O_2} \). Using the empirical formula, find the molecular formula of the compound.

Answer Options

A. Empirical formula \( \mathrm{C_3H_6O} \); molecular formula \( \mathrm{C_6H_{12}O_2} \)
B. Empirical formula \( \mathrm{C_2H_5O} \); molecular formula \( \mathrm{C_4H_{10}O_2} \)
C. Empirical formula \( \mathrm{C_2H_4O_2} \); molecular formula \( \mathrm{C_4H_8O_4} \)
Correct Answer D. Empirical formula \( \mathrm{C_2H_4O} \); molecular formula \( \mathrm{C_4H_8O_2} \)
Correct Answer
D
Correct Option:
Empirical formula \( \mathrm{C_2H_4O} \); molecular formula \( \mathrm{C_4H_8O_2} \)

About This Question

This is Neco Model Questions Vol1 2020 Chemistry Question 41. It is one of the objective questions from the 2020 Neco Model Questions Vol1 Chemistry examination.

Difficulty level: Medium .

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