Calculate the ph of a solution prepared by dissolving 0.750 mol of nh3 and 0.250 mol of nh cl 4 in water sufficient to yield 1.00 l of solution. the kb of ammonia is 1.77 × 10-4 .

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.