Consider the equilibrium reaction 2NO2(g) <--> N2O4(g).
A sample of pure NO2(g) with a concentration of 0.240 M is allowed to come to equilibrium. It is then found that 75.0% of the NO2(g) has reacted to form N2O4(g). What is the value of Kc?
A. 0.102
B. 0.667
C. 0.040
D. 1.50
E. 25.0