How many grams of ammonia can be produced from 1.33 grams of nitrogen trichloride?

Need on both questionswill markbr />

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.

What does a numerical subscript following an element in a chemical formula mean?