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Kc = 2.6 x 10^8 at 825 K for the reaction 2H2(g) + S2(g) ⇌ 2H2S(g) The equilibrium concentration of H2 is 0.0020 M and S2 is 0.0010 M. What is the equilibrium concentration of H2S? a) 0.10 M b) 0.0010 M c) 10 M d) 1.0 M