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Given the following reaction: H2(g) + Br2(g) ⇌ 2 HBr(g) Kc = 45 at 35°C 4.00 moles of H2 and 2 moles of Br2 are combined in a 0.50 L container. Determine the concentrations of H2, Br2, and HBr at equilibrium.