Single Biggest Cancer Dictionary in the World

What is

molecular mass

?

Pronunciation: /məˈlɛkjələr mæs/

molecular mass

Definition

The sum of the atomic masses of all atoms in a molecule, based on a scale in which the atomic masses of hydrogen, carbon, nitrogen, and oxygen are 1, 12, 14, and 16, respectively. For example, the molecular mass of water, which has two atoms of hydrogen and one atom of oxygen, is 18 (i.e., 2 + 16). Also called molecular weight.