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3.1 Chemical measurements, conservation of mass and the quantitative interpretation of chemical equations

3.1 Chemical measurements, conservation of mass and the quantitative interpretation of chemical equations

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Question 1
53%

In the industrial synthesis of nitric acid, ammonia (NH3\text{NH}_3NH3​) is catalytically oxidised by oxygen gas (O2\text{O}_2O2​). During a test run of this process under specific conditions, 0.080 mol of NH3\text{NH}_3NH3​ reacts completely with exactly 0.100 mol of O2\text{O}_2O2​.

Which of the following is the correct balanced equation for this reaction?

A

4NH3+3O2→2N2+6H2O4\text{NH}_3 + 3\text{O}_2 \rightarrow 2\text{N}_2 + 6\text{H}_2\text{O}4NH3​+3O2​→2N2​+6H2​O

B

4NH3+7O2→4NO2+6H2O4\text{NH}_3 + 7\text{O}_2 \rightarrow 4\text{NO}_2 + 6\text{H}_2\text{O}4NH3​+7O2​→4NO2​+6H2​O

C

4NH3+5O2→4NO+6H2O4\text{NH}_3 + 5\text{O}_2 \rightarrow 4\text{NO} + 6\text{H}_2\text{O}4NH3​+5O2​→4NO+6H2​O

D

2NH3+2O2→N2O+3H2O2\text{NH}_3 + 2\text{O}_2 \rightarrow \text{N}_2\text{O} + 3\text{H}_2\text{O}2NH3​+2O2​→N2​O+3H2​O

Markscheme

3.1 Chemical measurements, conservation of mass and the quantitative interpretation of chemical equations Questions

  1. GCSE
  2. /Chemistry
  3. /3.1 Chemical measurements, conservation of mass and the quantitative interpretation of chemical equations

53 exam-style questions on AQA GCSE Chemistry 3.1 Chemical measurements, conservation of mass and the quantitative interpretation of chemical equations, covering 3.1.1 Conservation of mass and balanced chemical equations, 3.1.2 Relative formula mass, 3.1.3 Mass changes when a reactant or product is a gas, and 3.1.4 Chemical measurements. Each one has a worked solution and a mark scheme showing where the marks go.

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