A45.8 g sample of nacl contains 29.5 g of cl. calculate the % composition of na and cl

How hot is the suns corona? (integrated science)

Which of the following are correct values for the ideal gas laws constant r

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.