Question

Equal volumes of all gases under similar
conditions of temperature and pressure contain
equal numbers of molecules. This statement was made by
(a) Gay-Lussac (b) Avogadro
(c) Berzilius (d) John Dalton

Answer 1

Heya mate , your Answer is :-

     (b) Avogadro

Avogadro's law states that "equal volumes of all gases, at the same temperature and pressure, have the same number of molecules." For a given mass of an ideal gas, the volume and amount (moles) of the gas are directly proportional if the temperature and pressure are constant.

Answer 2

Answer:

Avagadro as it states that equal volume of gases at similar pressure and temperature contains equal no. of molecules