Phosphorus and bromine react to form phosphorus tribromide, like this: PĄ(9) + 6 Br,(9) → 4 PB13(9) Also, a chemist finds that at a certain temperature the equilibrium mixture of phosphorus, bromine, and phosphorus tribromide has the following composition: compound pressure at equilibrium P4 15.9 atm Br, 24.2 atm PB13 49.4 atm Calculate the value of the equilibrium constant K, for this reaction. Round your answer to 2 significant digits. K, = 0

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