A mole is that quantity of a substance whose mass in grams is equal in magnitude to the molecular mass of that substance in daltons. The SI unit is mole.
Examples
The molecular mass of oxygen is 32 u; 32 g oxygen is 1 mole of oxygen.
The atomic mass of carbon is 12 u; 12 g carbon is 1 mole of carbon.
The molecular mass of H2O is 18 u; 18 g H2O is 1 mole of water.
Number of moles of Mass of substance (n) = \(\frac{\text{Mass of substance in grams}}{Molecular mass of substance}\)
