Molecular weight is essentially the sum total weight of all atoms present in a molecule. It's measured in atomic mass units (amu).
Atomic Mass Unit (amu): A unit used for indicating mass on an atomic or molecular scale.
In chemistry, it represents Avogadro’s number (6.022 x 10^23) entities such as atoms or molecules.
Molar Mass Distribution: It provides information about the distribution by size (molecular weight) for polymers.