Question

Difference between relative molecular mass,molecular mass and formula unit mass.Explain with example,and also how to calculate each one.(dont provide the ans with links).

Answer 1

1.

Relative molecular mass:
the ratio of the average mass of one molecule of an element or compound to one twelfth of the mass of an atom of carbon-12


The formula unit mass is the equal to the sum of atomic masses of all the atoms in the empirical formula of the compound. For e.g. the formula mass of CH₂O is

Moleuclar mass : It is the sum of individual atomic masses of the of the atoms in the molecule.