2) molecular weight. The Columbia Encyclopedia, Sixth Edition. 2001
...The molecular weight may be calculated from the molecular formula of the substance; it is the sum of the atomic weights of the atoms making up the molecule. For example,...

3) colligative properties. The Columbia Encyclopedia, Sixth Edition. 2001
...Colligative properties of a solution include freezing point (see freezing), boiling point, osmotic pressure (see osmosis), and solvent vapor pressure. By measuring...