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Hydrogen sulfide decomposes according to the following equation, for which Kc = 0.0000872 at a given temperature. 2 H2S(g) <=> 2 H2(g) + S2(g) If 6.21 mol of H2S is placed in a 3.0 L container, what is the equilibrium concentration of H2(g)? Give your answer to 3 decimal places.