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Mean free path of air particles

Values for calculation

$ R^* $ $ \mathrm{J\cdot\ K^{-1}\cdot\ kmol^{-1}} $
$ N_A $ $ \mathrm{kmol^{-1}} $
$ σ $ $ \mathrm{m} $
$ \{T\in\mathbb{R}\mid T>0\} $
This set includes all real numbers that are greater than zero. Therefore, it contains only positive numbers. Zero and negative numbers are not included in this set.
$ T $ $ \mathrm{K} $
$ \{p_{air}\in\mathbb{R}\mid p_{air}>0\} $
This set includes all real numbers that are greater than zero. Therefore, it contains only positive numbers. Zero and negative numbers are not included in this set.
$ p_{air} $ $ \mathrm{Pa} $

Calculation

Mean free path of air particles

$$l=\cfrac{R^*}{\sqrt{2}\cdot π\cdot N_A\cdot σ^2}\cdot\cfrac{T}{p_{air}}$$
$l=\cfrac{R^*}{\sqrt{2}\cdot π\cdot N_A\cdot σ^2}\cdot\cfrac{T}{p_{air}}$
Equations in LaTeX code
l=\cfrac{R^*}{\sqrt{2}\cdot π\cdot N_A\cdot σ^2}\cdot\cfrac{T}{p_{air}}
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