Sulphur compounds contribute to air pollution . why do you think they are undesirable to air

Which actions would increase the rate at salt dissolves in water? stir the water? crush the salt? use less water? heat the water? cool the salt

What is the lowest number energy level where a d sublevel is found

Which symbol can be used to indicate the pressure at which a chemical reaction is carried out? 25°c 2 atm pa