Massa Atom Relatif

\begin{equation*}
\begin{split}
\text{Ar Mg} & = \frac{\text{massa 1 atom Mg}}{\frac{1}{12} \text{ massa 1 atom C-12}} \\\\
\text{Ar Mg} & = \frac{4,037 \:.\: 10^{-23}}{\frac{1}{12} \:.\: 1,99 \:.\: 10^{-23}} \\\\
\text{Ar Mg} & = 24,34
\end{split}
\end{equation*}