Question

A polystyrene sample has a number average molecular weight of 100,000 g/mol and a polydispersity of 2. What is the weight average molecular weight?
a. 5:50,000 g/mol
b. 5:100,000 g/mol
c. 5:100,002 g/mol
d. 5:200,000 g/mol
e. 5:2,000,000 g/mol