a) Gọi \(\left\{{}\begin{matrix}n_{H_2}=a\left(mol\right)\\n_{CO_2}=b\left(mol\right)\end{matrix}\right.\Rightarrow\left\{{}\begin{matrix}2a+44b=4,8\\a+b=\dfrac{6,72}{22,4}=0,3\end{matrix}\right.\)
=> a = 0,2; b = 0,1
=> \(\left\{{}\begin{matrix}\left\{{}\begin{matrix}\%V_{H_2}=\dfrac{0,2}{0,3}.100\%=66,67\%\\\%V_{CO_2}=100\%-66,67\%=33,33\%\end{matrix}\right.\\\left\{{}\begin{matrix}\%m_{H_2}=\dfrac{0,2.2}{4,8}.100\%=8,33\%\\\%m_{CO_2}=100\%-8,33\%=91,67\%\end{matrix}\right.\end{matrix}\right.\)
b) \(M_{TB}=\dfrac{4,8}{0,3}=16\left(g/mol\right)\)