\(n_{CO_2}=\dfrac{11,2}{22,4}=0,5\left(mol\right)\)
\(n_{H_2O}=\dfrac{7,2}{18}=0,4\left(mol\right)\)
Gọi số mol C2H4, C2H2 là a, b (mol)
Bảo toàn C: 2a + 2b = 0,5
Bảo toàn H: 4a + 2b = 0,8
=> a = 0,15 (mol); b = 0,1 (mol)
\(\left\{{}\begin{matrix}\%n_{C_2H_4}=\dfrac{0,15}{0,15+0,1}.100\%=60\%\\\%n_{C_2H_2}=\dfrac{0,1}{0,15+0,1}.100\%=40\%\end{matrix}\right.\)