What is the expression for the equilibrium constant? 2B1F5(g) = Br2(g) + 5F2(g) O a) Keq = [Br2] [F2] / [B1F5] b) Keq = [Br2] [F2]° / [BrFs]? c) Keq = [Br2] [F21² / [BrF5]$ d) Keq = [BrF5]? /[Br2][F2]$

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