A 1.0 L flask is filled with NO and O2 initially. After the reaction establishes equilibrium, the flask is found to contain 0.0018 mol NO, 0.0012 mol O2 and 0.78 mol NO2. What is the value of the equilibrium constant, K c, at this temperature? 2NO(g) + O2(g) 2NO2(g) a. 1.6×108 b. 6.3×10–9 c. 2.8×10–6 d. 3.6×105

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