Question

what is the significance of writing the chemical formula.

Answer 1

Without getting into the detail of any one of them, chemical formula tells us what elements are in the molecule or chemical compound. It is a representation of the substance on paper. Like the significance of your full name, which makes you special. It can tell us the atoms that compose that molecule. It enable us to do stochiometric calculation of a chem reaction. For simple organic molecule, it can show us the structure...!!