How does the value of Kc in N2O4(g)⇋2NO2(g) Kc=[NO2]2[N2O4] depend on the starting concentrations of NO2 and N2O4? How does the value of in depend on the starting concentrations of and ? It increases with increasing the values of the starting concentrations. It decreases with increasing the values of the starting concentrations. It does not depend on starting concentrations.