What are Atoms?
what do they do?

Which statement accurately describes the relationship between air pressure, air density, or altitude? as altitude increases, pressure increases.as altitude increases, air density increases.air pressure and density are lowest at sea level.denser air exerts more pressure than less dense air.

What is the number of moles of chemical units represented by 9.03x10^24? and how do i show work? (dumb it down )

How many moles of air are there in a human lung with a volume of 2.4 l at stp? explain your answer