a)
2H2 + O2 --to--> 2H2O
2CO + O2 --to--> 2CO2
b)
Gọi số mol H2, CO là a, b
=> 2a + 28b = 68
PTHH: 2H2 + O2 --to--> 2H2O
a--->0,5a
2CO + O2 --to--> 2CO2
b----->0,5b
=> 0,5a + 0,5b = \(\dfrac{89,6}{22,4}=4\)
=> a = 6(mol); b = 2(mol)
\(\left\{{}\begin{matrix}\%m_{H_2}=\dfrac{6.2}{68}.100\%=17,65\%\\\%m_{CO}=\dfrac{2.28}{68}.100\%=82,35\%\end{matrix}\right.\)