20. A compound's empirical formula is C5H5O If the molecular mass of the compound is 162.2g, what is the molecular formula? NO LINKS PLEASE:)!

This drawing shows a human body system. what is the primary function of this body system?

When balancing a chemical equation:

Harry lives in a city, and he has a lung condition known as asthma. on certain days, harry has to stay inside because pollutants in the air make it difficult for him to breathe. which of these pollution sources are nonpoint sources that might bother harry if he goes outside? choose the two that apply.