Consider a hypothetical mixture consisting of 90% by weight ofmolecules of molecular weight of 10,000 g/mol, 5% by weight ofmolecules of molecular weight of 1,000 g/mol, and 5% by weight ofmolecules of molecular weight of 100 g/mol;

a) Calculate the number-average molecular weight, weight-averagemolecular weight; and polydispersity index;

b) Predict what does the mixture look like;

In reverse, consider a hypothetical mixture consisting of 90% byweight of molecules of molecular weight of 100 g/mol, 5% by weightof molecules of molecular weight of 1,000 g/mol, and 5% by weightof molecules of molecular weight of 10,000 g/mol.

a) Calculate the number-average molecular weight, weight-averagemolecular weight; and polydispersity index;

b) Predict what does the mixture look like;