Final answer:
The correct formula for dinitrogen pentoxide is c. N₂O₅, as the name indicates two nitrogen atoms and five oxygen atoms.
Step-by-step explanation:
The correct formula for dinitrogen pentoxide is c. N₂O₅. This can be concluded by looking at the prefixes in the name: 'di-' indicates two nitrogen atoms and 'penta-' indicates five oxygen atoms, hence N₂O₅. When balancing chemical equations to form dinitrogen pentoxide, the reaction can be represented as 2 N₂ + 5 O₂ → 4 N₂O₅, reflecting the stoichiometry of the reaction between molecular nitrogen (N₂) and oxygen (O₂).