What is the molecular formula for dinitrogen pentoxide?

The molecular formula for dinitrogen pentoxide is represented as N2O5. This is derived from the systematic naming of the compound based on the number of nitrogen and oxygen atoms it contains.

The prefix "di-" indicates that there are two nitrogen atoms in the molecule, while "penta-" signifies that there are five oxygen atoms. Thus, the combination of these prefixes leads to the molecular formula N2O5, accurately reflecting the composition of the compound.

Understanding the prefixes used in nomenclature is essential for constructing molecular formulas from names. In contrast, options like N2O, N2O3, and NO2 do not match the stipulated quantities of nitrogen and oxygen atoms, as indicated by the prefixes in the compound's name. Therefore, N2O5 is the only formula that corresponds to the name dinitrogen pentoxide.