(1)	$\begin{array}{l}\displaystyle \rho(T, p) = \frac{M}{R} \cdot \frac{p}{T}\end{array}$

where

$\begin{array}{l}\rho\end{array}$	Gas density	$\begin{array}{l}p\end{array}$	Gas pressure	$\begin{array}{l}M\end{array}$	Gas molar mass
		$\begin{array}{l}T\end{array}$	Gas temperature	$\begin{array}{l}R\end{array}$	Gas constant

Alternative forms

(2)	$\begin{array}{l}\displaystyle p = n \, k \, T\end{array}$

(3)	$\begin{array}{l}\displaystyle p = \rho_m \, R \, T\end{array}$

(4)	$\begin{array}{l}\displaystyle p = \frac{R \, T}{V_m}\end{array}$

(5)	$\begin{array}{l}\displaystyle p \, V = \nu \, R \, T\end{array}$

(6)	$\begin{array}{l}\displaystyle Z = 1\end{array}$

$\begin{array}{l}n = \frac{\rho}{M}\end{array}$

$\begin{array}{l}\rho_m\end{array}$

$\begin{array}{l}V_m\end{array}$

$\begin{array}{l}V\end{array}$

$\begin{array}{l}Z\end{array}$

$\begin{array}{l}k\end{array}$

$\begin{array}{l}\nu\end{array}$

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