Nitric oxide, NO, is formed in automobile exhaust by the reaction of N2 with O2 (from air) N2(g) + O2(g) ↔ 2NO(g) The equilibrium constant Kc is (3.50x10^-3) at 2127°C. If an equilibrium mixture at this temperature contains 0.023 mol N2 and 0.031 mol O2 per liter, what is the concentration of NO in the mixture? Express your answer to three significant figures.

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