Analysis of a reaction mixture showed that
it had the composition 0.431 mol/L N2,
0.539 mol/L H2, and 0.127 mol/L NH3 at
800 K, at which temperature Kc = 0.278 for
N2(g) + 3 H2(g) ⇀↽ 2 NH3(g).
Calculate the reaction quotient Qc