a) C2H4 + Br2 --> C2H4Br2
b) nBr2 = 0,2.0,2 = 0,04 (mol)
PTHH: C2H4 + Br2 --> C2H4Br2
0,04<--0,04
=> \(m_{C_2H_4}=0,04.28=1,12\left(g\right)\)
\(m_{CH_4}=n_{CH_4}.M_{CH_4}=\left(\dfrac{1,12}{22,4}-0,04\right).16=0,16\left(g\right)\)
c) \(\left\{{}\begin{matrix}\%V_{C_2H_4}=\dfrac{0,04.22,4}{1,12}.100\%=80\%\\\%V_{CH_4}=100\%-80\%=20\%\end{matrix}\right.\)