In a stoichiometric system hexamethylene disocyanate monomer reacts with ethylene glycol in a 1.5mol/l concentration. It is known that the reactor contains also 0.15mol/1 methanol. Given 96% conversion, what will be the number average molecular weight of the obtained polymer? (Note: In this reaction there are no condensation products) Given: H=1,C=12,N=14,O=16(g/mol) a. About 1380g/mol b. About 1804g/mol c. About 156181g/mol d. About 1050g/mol e. About 2760g/mol f. About 902g/mol