Is frying fish in hot oil a chemical change?

How many grams of aluminum will there be in 98g of al2o3?

Can someone me with 3 and 4 plz. this is for masteries test.

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.