\(n_{CH_4} = a(mol) ; n_{H_2} = b(mol) ; n_{CO} = c(mol)\\ \Rightarrow a + b + c = \dfrac{8,96}{22,4} = 0,4(1)\\ TN1 :\\ CH_4 + 2O_2 \xrightarrow{t^o} CO_2 + 2H_2O\\ 2H_2 + O_2 \xrightarrow{t^o} 2H_2O\\ 2CO + O_2 \xrightarrow{t^o} 2CO_2\\ n_{O_2} = 2a + 0,5b + 0,5c = \dfrac{7,84}{22,4} = 0,35(2)\\ TN2:\\ CuO + H_2 \xrightarrow{t^o} Cu + H_2O\\ \)
\(n_{CuO} = \dfrac{48}{80} = 0,6(mol) CuO + CO \xrightarrow{t^o} Cu + CO_2\\ \dfrac{m_{hh}}{n_{CuO}}=\dfrac{16a + 2b + 28c}{b + c} = \dfrac{14,8}{0,6}(3)\\ (1)(2)(3) \Rightarrow a = 0,1 ; b = 0,1 ; c = 0,2\\ \%V_{CH_4} = \%V_{H_2} = \dfrac{0,1}{0,4}.100\% = 25\%\\ \%V_{CO} = \dfrac{0,2}{0,4}.100\% = 50\%\)