In Q.NO.53,Z-average molar mass`(Mbar(z))`is defined as:

Statement 1: Mbar(n) (number -average molecular mass) of a polymer is determined by osmotic pressure method,while Mbar(w) (weight -average molecular mass)is determined by ultracentrifuge method. Statement 2:Osmotic pressure is a colligative property.

Statement 1: Mbar(n) (number -average molecular mass) of a polymer is determined by osmotic pressure method,while Mbar(w) (weight -average molecular mass)is determined by ultracentrifuge method. Statement 2:Osmotic pressure is a colligative property.

The PDI (polydispersity index) is the ratio of weight to number-average molecular masses (Mbar(w))//(M(bar(n)) .In natural polymers,which are generally monodispersed, PDI is………and in synthetic polymers which are always polydispersed, PDI is …….. because Mbar(w) is always .......than Mbar(n) .

Define average atomic mass

Define and explain molar mass.

Define and explain molar mass.