\(2CO + O_2 \xrightarrow{t^o} 2CO_2(1)\\ 2H_2 + O_2 \xrightarrow{t^o} 2H_2O(2)\\ n_{CO} = n_{CO_2} = \dfrac{4,48}{22,4} = 0,2(mol)\\ n_{O_2(1)} = \dfrac{n_{CO_2}}{2} = 0,1(mol)\\ \Rightarrow n_{H_2} = 2n_{O_2(2)} = 2.(\dfrac{6,72}{22,4}-0,1)=0,4(mol)\\ \%V_{CO} = \dfrac{0,2}{0,2+0,4}.100\% = 33,33\%\\ \%V_{H_2} = 100\% -33,33\% = 66,67\%\)
\(\%m_{CO} = \dfrac{0,2.28}{0,2.28+0,4.2}.100\% = 87,5\%\\ \%m_{H_2} = 100\% - 87,5\% = 12,5\%\)