Question

define the formula mass​

Answer 1

The formula mass of a molecule (also known as formula weight) is the sum of the atomic weights of the atoms in the empirical formula of the compound. Formula weight is given in atomic mass units (amu).

Answer 2

$\bold{Mass:-}$

Mass of an object can be measured by its inertia.

The mass of a body is the quantity of matter contained in it. Mass is a scaler quantity which has only magnitude but no direction.

SI unit of mass is kg.