A __________ depicted as Mn, Let Ni equal the number of the molecules or moles or other calculated of number of molecules with mass M, or a calculated of mass such as D.P.

Correct Answer: Number average molecular weight
The 1st is a simple average where each molecule contributes equally to the average a number average molecular weight depicted as Mn. Let Ni equal the number of the molecular or moles or other measure of number of molecular with mass M, or a measure of mass such as D.P.