Gọi số mol H2, CO là a, b (mol)
\(\overline{M}_A=\dfrac{2a+28b}{a+b}=8,8.2=17,6\left(g/mol\right)\)
=> 2a + 28b = 17,6a + 17,6b
=> 15,6a = 10,4b
=> \(a=\dfrac{2}{3}b\)
\(\%m_{H_2}=\dfrac{2a}{2a+28b}.100\%=\dfrac{2.\dfrac{2}{3}b}{2.\dfrac{2}{3}b+28b}.100\%=4,545\%\)
\(\%m_{CO}=\dfrac{28b}{2a+28b}.100\%=\dfrac{28b}{2.\dfrac{2}{3}b+28b}.100\%=95,455\%\)