Estimate the time needed for a glycine molecule to diffuse a distance of 10 μm in water at 20∘c if its concentration varies over that distance from 1.00 mol/m3 to 0.70 mol/m3 ?

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.