A sample of 0.750 mol of PCl5 is heated to 250℃ in a 1.00 L reaction container to produce PCl3 and Cl2. The balanced reaction equation is PCl5(g) ßà PCl3(g) + Cl2(g) At this temperature the equilibrium constant Kc = 4.2 x 10-4. Calculate the equilibrium concentrations for PCl3 and Cl2. Use a RICE table and show all calculations. If required, check % error.

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