Question

For what type of compound are we unable to write a molecular formula?

Short answer

Ionic compounds are not represented by molecular formula but are represented by empirical formula.

Step-by-step solution

Explanation

Ionic compounds are generally not represented by molecular formula because they are not made up of single discrete molecule, thus they must be represented by aempirical formula that means the formula that shows the relative number of the component ions.

So, ionic compounds represented by formula which gives a ratio of the atoms in the compounds.

Example