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For the equilibrium reaction
Co(g)+H2O(g)<=>CO2(g)+H2(g)
the Keq value at 690°C is 10.0. A mixture of 0.300 mol of CO, 0.300 mol of H2O, 0.500 mol of CO2 and 0.500 mol of H2 is placed in a 1.0 L flask.

a) Write the Keq expression for this reaction and use the concentrations above to calculate a trial value of the Keq. Does this value match the given Keq ? Is the reaction at equilibrium ? Explain.

b)Calculate the equilibrium concentrations of all four species.

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