The equilibrium constant, Kc, for the following reaction is 1.47×10-2 at 628 K. 2HI(g) H2(g) + I2(g)

When a sufficiently large sample of HI(g) is introduced into an evacuated vessel at 628 K, the equilibrium concentration of I2(g) is found to be 0.323 M.

Calculate the concentration of HI in the equilibrium mixture. M