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The equilibrium constant Kc for the following reaction PCl3(g) + Cl2(g) <--> PCl5(g) equals 49 at 230°C.If 0.70 mol of PCl3 is added to 0.70 mol of Cl2 in a 1.00-L reaction vessel at 230 degrees Celcius, what is the concentration of PCl3 when equilibrium has been established?

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