# How are empirical and molecular formulas alike?

The empirical formula is the simplest whole number ratio defining constituent elements in a species. And the $\text{molecular formula}$ is a whole number multiple of the $\text{empirical formula}$.
And typically, the empirical formula is derived from carbon, hydrogen microanalysis (that is what $\text{empirical}$ means $\text{experimental}$. The molecular formula is derived when an estimate of the molecular mass of the molecule is obtained....