How many grams are in a lead sample containing 7.50 x 1023 lead atoms?

Which of these expressions are correct variations of the combined gas law? p1v1t2 = p2v2t1 both

Δu of , in kj/kg, as it isto k, (a)as a of , (b) at , (c) at .

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.