Consider the heterogenous equilibrium,

H2 (g) + S(s)<==> H2S (g) + heat

At a given temperature for this reaction, Keq = 14.3. What are the equilibrium concentrations of H2(g) and H2S (g) . when 0.200 mol of hydrogen and 6.00 mol of hydrogen sulfide are allowed to react and reach equilibrium in a 2.00 L container.