At 700 k, ccl4 decomposes to carbon and chlorine. the kp for the decomposition is 0.76. find the starting pressure of ccl4 at this temperature that will produce a atotal pressure of 1.9atm at equilibrium.

Reaction of CCl4 decomposition is following:
 CCl4 (g) --> C (s) + 2Cl2 (g)
 Kp = 0.76 = (P Cl2)^2/(P CCl4) carbon (C (s) is not included since it is in solid state and does not change volume
 Ptotal = 1.9atm = P Cl2
 P CCl4 * 0.76 = (P Cl2)^2
 P CCl4 = 4.75atm