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Question

If Kc = 7.04 x 10 - 2 for the reaction: 2 HBr (g) <> H2(g) + Br2 (g), what is the value of Kc for the reaction: 1 / 2 H2 (g) + 1 /2 Br2 (g) <> HBr (g) ? A) 3.52 x 10 - 2 B) 28.4 C) 3.77 D) 0.265