Are prefixes not considered when writing formulas for molecular componds?

You are absolutely correct! Prefixes are not considered when writing formulas for molecular compounds.

Here's why:

* Formulas represent the ratio of atoms: Chemical formulas are a shorthand way to express the ratio of different elements within a molecule.

* Prefixes indicate quantity: Prefixes like "mono", "di", "tri", etc., tell us the number of each type of atom in a molecule. This information is already conveyed by the subscripts in the formula.

Example:

* Carbon dioxide: The name tells us there's one carbon atom and two oxygen atoms. The formula is CO₂, not CO₂.

Let me know if you have any other questions about chemical formulas!