Some Basic Concepts Of Chemistry

the ratio of oxygen in \(\mathrm{H}_2 \mathrm{O}\) and \(\mathrm{H}_2 \mathrm{O}_2\) with respect to fixed mass of hydrogen atom is a whole number.

% of oxygen in \(\mathrm{H}_2 \mathrm{O}\) is constant irrespective of the source.

equal volume of all gases at the same temperature and pressure should contain equal number of molecules.

matter can neither be created nor destroyed.