The molar mass is also used to calculate the percent composition of an element. These two terms are explained here. ... To calculate the molar mass of a compound, ...

Percentage Composition=(Mass of the element in 1 mole of the compound/Molar mass of the compound)×100% For example, in water (H₂O): Mass of hydrogen in 1 mole of H₂O = 2 g ...

Check the list of 1 to 30 Elements With Symbols and Atomic Mass. ... Combine their atomic masses to find out the molecular mass of a compound/element formed by the combination of one or two atoms.