Which of the following states Avogadros Law?

Avogadro's Law states that equal volumes of all gases, under the same conditions of temperature and pressure, contain the same number of molecules [t2][t4][t5]. Formulated by Amedeo Avogadro in 1811, this principle implies that the volume of a gas is directly proportional to the number of moles of the gas when temperature and pressure are held constant [t4][t5]. Regarding the other options: Option 1 describes the Dulong and Petit Law, which relates specific heat and atomic weight [t3]. Option 2 describes Boyle's Law, which states that the volume of a fixed mass of gas is inversely proportional to its pressure at a constant temperature [t1][t6]. Option 4 describes Graham's Law of diffusion, which relates the rate of gas diffusion to the square root of its density [t3].

Sources

1. [1] https://www.khanacademy.org/science/physical-chemistry-essentials/x98cdf762ed888601:gaseous-state/x98cdf762ed888601:gas-laws/v/avogadros-law