Kc for the reaction of hydrogen and iodine to produce hydrogen iodide, h2(g) i2(g) ⇌ 2hi(g) is 54.3 at 430°c. determine the initial and equilibrium concentration of hi if initial concentrations of h2 and i2 are both 0.11 m and their equilibrium concentrations are both 0.052 m at 430°c.