HELP !! What types of bonds and atoms are in the molecule shown below?

Matches the chemical name of each oxide of phosphorus to its chemical formula

Compare and contrast physical changes with chemical changes.

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.