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Nitric Oxide, an Important Pollutant in Air, Is Formed from the Elements

Question 22

Multiple Choice

Nitric oxide, an important pollutant in air, is formed from the elements nitrogen and oxygen at high temperatures, such as those obtained when gasoline burns in an automobile engine. At 2000°C, K for the reaction N2(g) + O2(g) Nitric oxide, an important pollutant in air, is formed from the elements nitrogen and oxygen at high temperatures, such as those obtained when gasoline burns in an automobile engine. At 2000°C, K for the reaction N<sub>2</sub>(g)  + O<sub>2</sub>(g)    2NO(g)  is 0.01. Predict the direction in which the system will move to reach equilibrium at 2000°C if 0.4 mol of N<sub>2</sub>, 0.1 mol of O<sub>2</sub>, and 0.08 mol of NO are placed in a 1.0-L container. A)  The system remains unchanged. B)  The concentration of NO will decrease; the concentrations of N<sub>2</sub> and O<sub>2</sub> will remain unchanged. C)  The concentration of NO will decrease; the concentrations of N<sub>2</sub> and O<sub>2</sub> will increase. D)  The concentration of NO will increase; the concentrations of N<sub>2</sub> and O<sub>2</sub> will decrease. E)  More information is necessary. 2NO(g) is 0.01. Predict the direction in which the system will move to reach equilibrium at 2000°C if 0.4 mol of N2, 0.1 mol of O2, and 0.08 mol of NO are placed in a 1.0-L container.


A) The system remains unchanged.
B) The concentration of NO will decrease; the concentrations of N2 and O2 will remain unchanged.
C) The concentration of NO will decrease; the concentrations of N2 and O2 will increase.
D) The concentration of NO will increase; the concentrations of N2 and O2 will decrease.
E) More information is necessary.

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