Question

How many atoms of neon gas would a container with a volume of 67.2 L hold at STP?

Answer 1

The molar volume of an Ideal Gas at `STP` is `22.4*L`.

Explanation:

So all we have do is divide the actual volume by the molar volume, and mulitply that number by `N_A", Avogadro's number"`, which is the number of particles in one mole of particles:

Thus:

`"Number of atoms " =" " (67.2*L)/(22.4*L*mol^-1)xxN_A`

`=(67.2*L)/(22.4*L*mol^-1)xx6.022xx10^23*mol^-1`

`=3xxN_A` neon atoms. Neon, as a Noble gas, is an atomic species, though here the atoms are gaseous and not associated.