Neco 2017 Chemistry Question 8

Practice objective / multiple choice question 8 from the 2017 Neco Chemistry examination.

Neco 2017 Chemistry Objective / Multiple Choice Hard Difficulty
Question 8 NECO • 2017 • CHEMISTRY • objective

A solid sample containing only two oxides of a non‑metal X, namely \(\mathrm{XO}\) and \(\mathrm{XO_2}\), is reduced with hydrogen gas. From 1.80 g of the sample, 0.89 g of water are produced and 1.01 g of the metallic element X are recovered. Determine the atomic mass of X (to the nearest whole number) and the mass percent of each oxide in the original sample.

Answer Options

A. Atomic mass ≈ 26; XO ≈ 50.0 % and XO₂ ≈ 50.0 %
B. Atomic mass ≈ 30; XO ≈ 60.0 % and XO₂ ≈ 40.0 %
C. Atomic mass ≈ 28; XO ≈ 48.0 % and XO₂ ≈ 52.0 %
Correct Answer D. Atomic mass ≈ 28; XO ≈ 55.5 % and XO₂ ≈ 44.5 %
Correct Answer
D
Correct Option:
Atomic mass ≈ 28; XO ≈ 55.5 % and XO₂ ≈ 44.5 %

About This Question

This is Neco 2017 Chemistry Question 8. It is one of the objective questions from the 2017 Neco Chemistry examination.

Difficulty level: Hard .

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