Iodine and bromine react to give iodine monobromide, IBr. I2 (9) + Br2 (g) 2IB1(g) What is the equilibrium composition of a mixture at 101°C that initially contained 2.10 x 103 mol each of iodine and bromine in a 5.00 L vessel? The equilibrium constant K. for this reaction at 101°C is 39.5. [I2] = [Br2] M %3D (IBr] M %3D

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