4. (4 points) Styrene monomer is polymerized ionically in dichloroethane at a concentration of 200 g/dm'. H2SO4 is used as the initiator at a 20C reaction temperature. (a) What is the number average molar mass of the polystyrene formed given the following information: Rate coefficient for propagation Rate coefficient for ion pair rearrangement Rate coefficient for chain transfer to monomer 8.0 dm /mols 5.0 x 10-s 0.14 dm/mol s (b) What could you change about the reaction to increase the final molar mass