Neco Model Questions Vol1 2022 Chemistry Question 20

Practice objective / multiple choice question 20 from the 2022 Neco Model Questions Vol1 Chemistry examination.

Neco Model Questions Vol1 2022 Chemistry Objective / Multiple Choice Medium Difficulty

Question 20 NECO_MODEL_QUESTIONS_VOL1 • 2022 • CHEMISTRY • objective

A 10.0 g sample of an unknown hydrocarbon‑oxygen compound is burned completely in excess oxygen, producing 5.6 L of \(\mathrm{CO_2}\) and 4.5 L of \(\mathrm{H_2O}\) vapour at STP (22.4 L mol⁻¹). Determine the mass percent of carbon in the original sample.

Answer Options

A. 25.0 %

B. 40.0 %

Correct Answer C. 30.0 %

D. 35.0 %

Correct Answer

Correct Option:

30.0 %

About This Question

This is Neco Model Questions Vol1 2022 Chemistry Question 20. It is one of the objective questions from the 2022 Neco Model Questions Vol1 Chemistry examination.

Difficulty level: Medium .

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Neco Model Questions Vol1 2022 Chemistry Question 20

A 10.0 g sample of an unknown hydrocarbon‑oxygen compound is burned completely in excess oxygen, producing 5.6 L of \(\mathrm{CO_2}\) and 4.5 L of \(\mathrm{H_2O}\) vapour at STP (22.4 L mol⁻¹). Determine the mass percent of carbon in the original sample.

Answer Options

About This Question

Master the Exam!

A 10.0 g sample of an unknown hydrocarbon‑oxygen compound is burned completely in excess oxygen, producing 5.6 L of \(\mathrm{CO_2}\) and 4.5 L of \(\mathrm{H_2O}\) vapour at STP (22.4 L mol⁻¹). Determine the mass percent of carbon in the original sample.