Gọi \(\left\{{}\begin{matrix}n_{CH4}:a\left(mol\right)\\n_{O2}:b\left(mol\right)\end{matrix}\right.\)
\(\Rightarrow\left\{{}\begin{matrix}22,4a+22,4b=11,2\\\frac{16a+32b}{a+b}=12.2=24\end{matrix}\right.\Rightarrow\left\{{}\begin{matrix}a=0,25\\b=0,25\end{matrix}\right.\)
\(CH_4+2O_2\underrightarrow{^{to}}CO_2+2H_2O\)
\(n_{giam}=\frac{4,48}{22,4}=0,2\left(mol\right)=n_{O2\left(pư\right)}\)
\(\Rightarrow H=\frac{0,2.100}{0,25}=80\%\)