Boyle's law:
It states "at a constant temperature (T), the pressure (P) of a given mass (or moles, n) of any gas varies inversely with the volume (V)".
Gay Lussac's law:
It states "at constant volume, the pressure of a given mass of a gas is directly proportional to the absolute temperature of the gas".
Dalton's law of partial pressure states "at a given temperature, the total pressure exerted by two or more non-reacting gases occupying a definite volume is equal to the sum of the partial pressures of the component gases.