a, \(n_{hh}=\dfrac{7,84}{22,4}=0,35\left(mol\right)\)
\(n_{Br2}=\dfrac{24}{160}=0,15\left(mol\right)\)
\(CH_2=CH_2+Br_2\rightarrow CH_2+CH_2\)
/Br /Br
0,15mol<----- 0,15mol
\(nC_2H_4=0,15\left(mol\right)\)
\(\Rightarrow nCH_3=0,35-0,15=0,2\left(mol\right)\)
\(\%VCH_4=\%nCH_4=\dfrac{0,2}{0,35}.100\%=57,14\%\)
\(\%VC_2H_4=100-57,14=42,86\%\)