Crude oil is a mixture of many liquids. The crude oil enters the bottom of a tall column, where the mixture is heated. The substances rise up the column until they cool down and condense back to liquids. The components of crude oil can be separated because of differences in which property? density magnetism boiling point physical state

intermolecular forces are the forces between molecules or particles.

there are two kinds of van der waals forces: weak london dispersion forces and stronger dipole-dipole forces.

in molecule of water there are dipole-dipole forces between negatively charged oxygen from one molecule of water and positively charger hydrogen of another molecule of water.

hydrogen bond is an electrostatic attraction between two polar groups that occurs when a hydrogen atom (h), covalently bound to a highly electronegative atom such as flourine (f), oxygen (o) and nitrogen (n) atoms.