The reaction
2 NO2(g) ⇄ N2O4(g)
has an equilibrium constant, Kc, of 170 at 25 °C. If 2.0 × 10−3 mol of NO2 is present in a 10.-L. Flask along with 1.5 × 10−3 mol of N2O4, is the system at equilibrium? If it is not at equilibrium, does the concentration of NO2 increase or decrease as the system proceeds to equilibrium?
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