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Hydrogen sulfide decomposes according to the following reaction, for which Kc = 9.30 x 10^-8 at 700 degrees C: 2 H2S(g) ⇌ 2 H2(g) + S2(g) If 0.25 mol of H2S is placed in a 3.0-L container, what is the equilibrium concentration of H2(g) at 700 degrees C?