Calculate the number of moles in the 2.1-l volume of air in the lungs of the average person. note that the air is at 37.0ºc (body temperature). use standard atmospheric pressure.

In 2002, the rare earth elements mine in mountain pass, california was closed because

What is a difference between a mixture of elements and a mixture of compounds

Does the number of ions in solution increase, decrease, or remain constant? it continuously decreases. it continuously increases. it decreases at first, then increases. it increases at first, then decreases.