Explain how you could calculate the acceleration of an object

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

At element makes up all organic compounds?

The size (radius) of an oxygen molecule is about 2.0 ×10−10m. make a rough estimate of the pressure at which the finite volume of the molecules should cause noticeable deviations from ideal-gas behavior at ordinary temperatures (t= 300k ). assume that deviatons would be noticeable when volume of the gas per molecule equals the volume of the molecule itself.