0.50 mol of I2 and 0.50 mol of Br2 are placed in a 1.00 flask and allowed to reach equilibrium.  At equilibrium, the flask contains 0.84 mol of IBr.  What is the value of the Kc for this reaction?                           I2(g) + Br2(g) --> 2 IBr(g)   Group of answer choices 11 4.0 40.0 110

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