Giả sử \(\left\{{}\begin{matrix}C_2H_4:1mol\\N_2:1mol\\CO:1mol\end{matrix}\right.\)
\(d_X\)/H2=\(\dfrac{m_{C_2H_4}+m_{N_2}+m_{CO}}{M_{H_2}}=\dfrac{1\cdot28+1\cdot2\cdot14+1\cdot28}{2}=42\)
\(d_X\)/kk=\(\dfrac{28+28+28}{29}=\dfrac{84}{29}>1\Rightarrow\)Nặng hơn không khí