How many molecules are there in 2.30 grams of nh3 ?

Suppose you wanted to make 100 grams of water. what is the molar mass of water (h2o)?

Word equation for k(s) +h2o(l) yield koh (aq) + h2

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.