What is the difference between molecular mass and molar mass? Calculate the molecular mass and molar mass for carbon monoxide.

Explanation

Molecular mass:
(i) Relative molecular mass is defined as the ratio of the mass of the molecule to the unified atomic mass unit.
(ii) It can be calculated by adding the relative atomic masses of its constituent atoms.
(iii) For carbon monoxide (CO) Molecular mass = Atomic mass of carbon + Atomic mass of oxygen 12+16 = 28u.
Molar mass:
(i) It is defined as the mass of one mole of a substance.
(ii) The molar mass of a compound is equal to the sum of the relative atomic masses of its constituent expressed in g `mol^(-1)` .
(iii) For carbon monoxide (CO)
12+ 16 = 28 g `mol^(-1)` .
Both molecular mass and molar mass are numerically same but the units are different.