Amedeo Avogadro

The integral molecules of compound gases are formed of atoms of different kinds united into one.

The number of integral molecules in any gas is always the same for the same volume, or always proportional to the volumes, under the same conditions of temperature and pressure.

The relative masses of the molecules of different substances will be given by the ratios of their densities in the gaseous state.

The integral molecules of simple gases are composed of at least two atoms, and these atoms are identical.

The hypothesis of equal numbers of molecules in equal volumes of gases provides a simple and consistent explanation for the observed volumetric ratios in chemical reactions.

The relative masses of the atoms are given by the ratios of the densities of the simple gases, divided by the number of atoms in their respective molecules, which is usually two.

The integral molecules of simple gases are formed of a certain number of simple atoms united into one, and these molecules are, in their turn, in the ordinary state, separated from each other by a distance so great that their mutual attraction is not exerted.

The number of integral molecules in any gas is always the same for the same volume, or always proportional to the volumes, under the same conditions of temperature and pressure, whatever may be the nature of the gas.

The relative masses of the molecules are proportional to the densities of the gases, and the relative masses of the atoms are proportional to the densities of the simple gases, divided by the number of atoms in their respective molecules, which is generally two for simple gases.

The integral molecules of simple gases are composed of at least two atoms, and these atoms are identical, while those of compound gases are formed of atoms of different kinds.

The hypothesis of equal numbers of molecules in equal volumes of gases is a fundamental principle for understanding the composition of matter.

The relative masses of the atoms are given by the ratios of the densities of the simple gases, divided by the number of atoms in their respective molecules, which is usually two for simple gases, and can be determined for compound gases by their reactions.

The integral molecules of simple gases are formed of a certain number of simple atoms united into one, and these molecules are, in their turn, in the ordinary state, separated from each other by a distance so great that their mutual attraction is not exerted, which explains the gaseous state.

The number of integral molecules in any gas is always the same for the same volume, or always proportional to the volumes, under the same conditions of temperature and pressure, whatever may be the nature of the gas, whether simple or compound.

The relative masses of the molecules are proportional to the densities of the gases, and the relative masses of the atoms are proportional to the densities of the simple gases, divided by the number of atoms in their respective molecules, which is generally two for simple gases, and can be determined for compound gases by their reactions and volumetric ratios.

The integral molecules of simple gases are composed of at least two atoms, and these atoms are identical, while those of compound gases are formed of atoms of different kinds, united in definite proportions.

The hypothesis of equal numbers of molecules in equal volumes of gases is a fundamental principle for understanding the composition of matter and the nature of chemical reactions.

The relative masses of the atoms are given by the ratios of the densities of the simple gases, divided by the number of atoms in their respective molecules, which is usually two for simple gases, and can be determined for compound gases by their reactions and volumetric ratios, leading to a consistent system of atomic weights.

It is clear that the same number of molecules must be contained in equal volumes of all gases at the same temperature and pressure.

I have been led to embrace the hypothesis that the simple gases are formed of integral molecules, which are themselves composed of a certain number of elementary molecules.