1.   The approximate molecular masses of the bands were calculated from the migration of known standards.

2.   The ratio between the integrated peak areas for each subunit was determined and corrected for the molecular mass of each subunit.

3.   The ideal gas equation can be used to calculate the relative molecular mass,, of a gas directly.

4.   So far we have not defined relative molecular mass, although we have defined relative atomic mass,.

5.   For a simple gas molecule, the relative molecular mass is simply the sum of the relative atomic masses for all the atoms in the molecule.

6.   Thus, for carbon dioxide, The relative molecular mass expressed as grams per mole is called the molar mass.