Question

What is the difference between molar mass and molecular mass?

Answer 1

Discussed below

Explanation:

The molecular mass is a relative mass of a molecule of a substance ( a compound or an element )measured by the ratio of the mass of one molecule of the substance to the mass of `1/12th` part of `""_6^12C` atom.
It is a unitless quantity,being the ratio of two masses.
The tiny constant mass of `1/12th` part of the mass of `"_6^12C` atom is also considered as unit of mass and is known as ‘amu’ or ‘u’.
`1"u or amu"=1.6xx10^(-24)g=1/Ng`
Where N = Avogadro’s Number.

The molecular mass of Carbon dioxide =44
But actual mass of one molecule of carbon dioxide molecule is `44u`

The molar mass of a substance (a compound or an element) is the mass of 1 mole or Avogadro’s number of the molecules of that substance expressed in `g/(mol)` unit

The molar mass of carbon dioxide is `44g/(mol)`