Formulae on Mole Concepts


Atomicity is the number of atoms of an element present in one molecule of that element. They can be monatomic (He),diatomic (H2),triatomic (O3) and polyatomic (S8).

Relative molecular mass shows the number of times a molecule is denser than a hydrogen atom or one amu. It is expressed as the ratio of the mass of a molecule of a substance to the mass of one amu (or to one atom of hydrogen).

Relative molecular mass= Mass of one molecule of a substance/one amu.

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