In the coal-gasification process, the reaction is: CO(g) + H2O(g) ⇌ CO2(g) + H2S(g) + H2(g). With 0.35 mol of CO and 0.40 mol of H2O placed in a 1.00-L reaction vessel, there is 0.19 mol of CO remaining. Determine the Keq at the temperature of the experiment?