When 3.0 mole of I2 and 4.0 mole of Br are placed in a 2.0-L rxn chamber at 150 degrees celsius, the following reaction occurs until equilibirum is reached. I2(g) + Br2(g) <--> 2IBr(g) Chemical analysis then shows that the reactor contains 3.2 mole of IBr. What is the equilibrium constant for the reaction ?

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