The physical significance of R is work per degree per mole.

A kilojoule per mole is a way of measuring the amount of heat needed for something.

Where, R is a universal gas constant per mole.

Thus, the heat capacity per mole of many solids is 3R.

It is also 1.00 gram per mole, almost by definition.

These particles have a mass of 1 gram per mole (to a few significant figures).

It is normally expressed as the number of grams per mole.

The term mol -1 thus means per mole of this specified equation.

For example, refers to "per mole of formed from its elements in their standard states".

M is the molar mass of the substance (in grams per mole).