The equilibrium constant, K, for the folowing reaction is 1.20x1o2 at 500 K PCI,(9) PCIy(0)+ Clzla) An equilibrium mixture of the three gases in a 1.00 L fask at 500 K contains 0.275 M PCI, 5.74x10 M PCI, and 5.74X102M CI, What will be the concentrations of the three gases once equilibrium has been reestablished, ifr 3.87x10 mot of Cly(9) is added to the flask? (PC (PC

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