Relation belween number of average molecular mass `(overline(M)_(n))` and weight of average molecular mass `(overline(M)_(w))` of synthetid polymers is

Calculate the average molecular mass of a polymer sample in which 30% molecules have a molecular mass 20,000, 40% have 30,000, and rest have 60,000. Strategy: Work out number average molecular mass (overline(M_(n))) as well as weight average molecular mass (bar(M_(w)))

What is the average molecular mass of drugs ?

Number-average molecular mass of a polymer is determined by:

If overline(M)_(w) is the weight average molecular weight and overline(M)_(n) is the number average molecular weinght of a polyme, the poly dispersity index (PDI) of the polymer is given by

The average molecular mass of colloidal can be dertermined by

The number of average molecular mass and mass average molecular mass of a polymer are respectively 30,000 and 40,000. They poly dispersity of the polymer is: