Final answer:
The molecular formula for trimethylamine is C3H9N. Trimethylamine contains three CH3 units, which means there are three carbon atoms and nine hydrogen atoms per molecule.
Step-by-step explanation:
The molecular formula for trimethylamine is C3H9N. Trimethylamine contains three CH3 units, which means there are three carbon atoms and nine hydrogen atoms per molecule. The nitrogen atom is represented by N. Because trimethylamine is composed mainly of carbon and hydrogen, it is classified as an organic compound.