Which of the following relationships is/are CORRECT for gases? 1. The amount of a gas (in moles) is inversely proportional to its volume (at constant temperature and pressure). 2. The volume of a gas is directly proportional to its temperature in kelvin (at constant pressure and moles). 3. The pressure of a gas is inversely proportional to its temperature in kelvin (at constant volume and moles).

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.