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Chemical equilibria, Le Chatelier’s principle and Kc​

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Question 6

The equation for the reaction between nitrogen monoxide and oxygen is shown below.

2NO(g)+O2(g)⇌2NO2(g) 2\text{NO}(\text{g}) + \text{O}_2(\text{g}) \rightleftharpoons 2\text{NO}_2(\text{g}) 2NO(g)+O2​(g)⇌2NO2​(g)

In an experiment, 3.00 mol of nitrogen monoxide are mixed with 2.00 mol of oxygen. The total amount of the three gases at equilibrium is 4.20 mol.

What is the mole fraction of nitrogen dioxide in the equilibrium mixture?

A

0.190

B

0.320

C

0.381

D

1.600

Markscheme

Chemical equilibria, Le Chatelier’s principle and Kc Questions

  1. A Level
  2. /Chemistry
  3. /Chemical equilibria, Le Chatelier’s principle and Kc

24 exam-style questions on AQA A Level Chemistry Chemical equilibria, Le Chatelier’s principle and $K_c$, covering Chemical equilibria and Le Chatelier's principle and Equilibrium constant $K_c$ for homogeneous systems. Each one has a worked solution and a mark scheme showing where the marks go.

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