At a certain temperature, the equilibrium constant, Kc, for this reaction is 53.3. H2(g) + I2(g) ⇌ 2HI(g) Kc = 53.3 At this temperature, 0.500 mol of H2 and 0.500 mol of I2 were placed in a 1.00−L container to react. What concentration of HI is present at equilibrium?