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Phosgene (COCl2) is an extremely poisonous gas that was used extensively in World War I as a chemical warfare agent. At 300oC, phosgene decomposes to carbon monoxide and chlorine with a Kp = 6.8 x 10-2. Calculate the pressure in the vessel at equilibrium after placing 3.00 grams of pure phosgene in a 1.00 litre reaction vessel.
COCl2(g) CO(g) + Cl2(g).

   a.    ) 0.19 atm. 
   b.    ) 0.28 atm. 
   c.    ) 0.94 atm. 
   d.    ) 1.15 atm. 
   e.    ) 1.71 atm.