Mol dan Volume

A.   Jumlah mol CH₄

\begin{equation*}
\begin{split}
n& = \frac{V}{22,4} \\\\
n& = \frac{11,2}{22,4} \\\\
n& = 0,5 \text{ mol } \ce{CH4}
\end{split}
\end{equation*}

B.   Massa CH₄

\begin{equation*}
\begin{split}
n& = \frac{m}{Mr} \\\\
0,5& = \frac{m}{ 12 + (4 \times 1)} \\\\
m& = 0,5 \times 16 \\\\
m & = 8 \text{ gram } \ce{CH4}
\end{split}
\end{equation*}