K can also be derived for any gas species, by making use of their molar mass.
In this case, the molar mass of the solute must be known.
These components have a low molar mass and evaporate quickly.
The zero angle light scattered is then related to the molar mass.
That is however a small effect since the molar masses are not that different.
However, you can not know the density of an object from its molar mass.
The density, molar mass and the critical temperature of the liquid have to be known.
You will note that with increasing molar mass, (as the number of C is increased) so to does the boiling point.
Why should the boiling point increase with molar mass?
These are grouped by their average molar mass and the content of different functional groups.