. State: (a) Gay-Lussac's Law of combining volumes
(a) Gay-Lussac's Law of combining volumes.
(b) Avogadro's law
(a) Gay-Lussac's law states that when gases react, they do so in volumes which bear a simple ratio to one another, and to the volume of the gaseous product, provided that all the volumes are measured at the same temperature and pressure.
(b) Avogadro's law states that equal volumes of all gases under similar conditions of temperature and pressure contain the same number of molecules.