Products /Reactants Coefficients are the superscripts or powers so they are. Kc=[C2H6O][H20] / [N2O4] Kc= [N2]2 [H2O]6 / [NH3]4[O2]3 Solution Products /Reactants Coefficients are the superscripts or powers so they are. Kc=[C2H6O][H20] / [N2O4] Kc= [N2]2 [H2O]6 / [NH3]4[O2]3.