\(CH_4\) không phản ứng với \(Br_2\)
\(C_2H_4+Br_2\rightarrow C_2H_4Br_2\left(1\right)\)
\(n\left(Br_2\right)=\dfrac{16}{160}=0,1\left(mol\right)\)
\(\left(1\right)\Rightarrow n\left(C_2H_4\right)=0,1\left(mol\right)\)
\(V\left(C_2H_4\right)=0,1.24,79=2,479\left(lít\right)\)
\(V\left(CH_4\right)=V\left(hh\right)-V\left(C_2H_4\right)=11,2-2,479=8,721\left(lít\right)\)
\(\%V\left(C_2H_4\right)=\dfrac{2,479}{11,2}.100\%=22,13\%\)
\(\%V\left(CH_4\right)=\dfrac{8,721}{11,2}.100\%=77,87\%\)