Chemistry: Atoms First (2nd Edition)

Published by Cengage Learning
ISBN 10: 1305079248
ISBN 13: 978-1-30507-924-3

Chapter 12 - Exercises - Page 524c: 26

Answer

$$K = 6.9 \times 10^{-4}$$

Work Step by Step

1. The exponent of each concentration is equal to its balance coefficient. $$K = \frac{[Products]}{[Reactants]} = \frac{[ NO ] ^{ 2 }}{[ N_2 ][ O_2 ]}$$ 2. Substitute the values and calculate the constant value: $$K = \frac{( 4.7 \times 10^{-4} )^{ 2 }}{( 0.041 )( 0.0078 )} = 6.9 \times 10^{-4}$$
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