# How do you find an empirical formula from mass percent?

Apr 14, 2016

Assume 100 g of compound. This gives a specific mass for each element measured.

#### Explanation:

Given that assumption, you divide thru the individual gram quantities by the atomic masses of $C$, $H$, and $N$. You can then get an empirical formula, ${C}_{n} {H}_{m} {N}_{o}$ etc.

There should be many examples of these boards of specific empirical formula problems.

The molecular formula may not be the same as the empirical formula but it is certainly a multiple of the empirical formula.