Nitrogen dioxide dimerizes according to the following reaction: 2NO2(g)⇌N2O4(g) Kp=6.7 at 298K. A 2.15-L container contains 0.052 mol of NO2 and 0.084 mol of N2O4 at 298K.

Part A Calculate Kc for the reaction. Express the equilibrium constant with respect to concentration to three significant figures.

Part B Calculate Q for the reaction. Express the reaction quotient to three significant figures.