How do you identify the chemical formula?

Explanation:

A chemical formula represents the atoms and the ratios by which they combine together in a compound or molecule.

So, in order to identify a chemical formula;

The valency is a good indicator of the combining power of every atom in forming a compound.

Most often times,

   NaOH is the symbol of sodium hydroxide containing :

                       Na       Sodium

                        O          Oxygen

                        H           Hydrogen

Several other compounds have formula more complicated or less complicated than this.

trigonal pyramidal

tetrahedral

trigonal planar

bent

the answer is c i took the test