What is the chemical formula for Nitrous oxide?

The correct choice, N2O, represents the chemical formula for nitrous oxide. This compound consists of two nitrogen atoms and one oxygen atom. It is a colorless gas that has anesthetic properties and is commonly used in medical settings for sedation and pain relief during various procedures. The presence of both nitrogen and oxygen in the formula indicates that nitrous oxide is significant in applications where both components are involved, emphasizing its specific role in the medical field.

On the other hand, the other options present different chemical compounds. For instance, N2 is simply nitrogen gas, which does not have anesthetic properties. NO2 is nitrogen dioxide, a toxic gas and pollutant, and CO is carbon monoxide, which is also hazardous and unrelated to medical applications involving anesthesia. Understanding these distinctions reinforces the importance of nitrous oxide's correct identification in medical practice and its proper applications.