What is the number of nitrogen molecules in 6.0 moles of N2

Which scenario is most similar to the type of collision that gas particles have according to kinetic molecular theory

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.

Balance the following reaction. as2s3 + 9o2 → 2as2o3 + so2