Assume that a polyesterification is conducted in the absence of solvent or catalyst and that the monomers are present in stoichiometric ratios. Calculate the time (min) required to obtain a number average degree of polymerization of 50, given that the initial dicarboxylic acid concentration is 3 mol L-1 and that the polymerization rate constant is 10-2 L mol-1 s -1 .

0.66y = 0.9x + 0.48 if y has a value of 108.45 what is the value of x?

Describe the difference between a. a hypothesis and a theory and b. an observation and an experiment.

Calculate the ratio of h+ ions to oh– ions at a ph = 7. find the concentration of h+ ions to oh– ions listed in table b of your student guide. then divide the h+ concentration by the oh– concentration. record this calculated ratio in table a of your student guide. compare your approximated and calculated ratios of h+ ions to oh– ions at a ph = 7. are they the same? why or why not? record your comparison in table a. what is the concentration of h+ ions at a ph = 7? mol/l what is the concentration of oh– ions at a ph = 7? mol/l what is the ratio of h+ ions to oh– ions at a ph = 7? : 1