## Physics for Scientists and Engineers: A Strategic Approach with Modern Physics (4th Edition)

$\frac{N}{V} = 2.69\times 10^{25}~m^{-3}$
We can calculate the Loschmidt number: $PV = NkT$ $\frac{N}{V} = \frac{P}{kT}$ $\frac{N}{V} = \frac{(1.015\times 10^5~N/m^2)}{(1.38\times 10^{-23}~J/K)(273~K)}$ $\frac{N}{V} = 2.69\times 10^{25}~m^{-3}$