(a) Calculate the concentration of initiator required to prepare polystyrene with a number average molar mass of 750kg/mol by bulk polymerization at 60C. Assume that termination by disproportionation and chain transfer are negligible (10 points) The relevant rate coefficients at 60C are: Initiator dissociation, kd=8.5106s1 Propagation, kp=833106Lmol1s1 Termination, kt=9.3106Lmol1s1 Initiator efficiency f=0.7 Molar mass of polystyrene repeating unit is 104g/mol The density of styrene at the polymerization temperature is 0.88g/cm3 (b) Calculate the total radical concentration (molL1) at the steady state (5 points) (c) Calculate the rate of polymerization (molL1s1) (5 points)