\(C_3H_4+AgNO_3+NH_3\rightarrow C_3H_3+Ag+NH_4NO_3\)
\(n_{C3H3Ag}=\frac{7,35}{147}=0,05\left(mol\right)\)
Theo PT \(\Rightarrow n_{C3H4}=n_{C3H3Ag}=0,05\left(mol\right)\)
\(n_{Br2}=\frac{40}{160}=0,25\left(mol\right)\)
PTHH :
\(C_2H_4+Br_2\rightarrow C_2H_4Br_2\)
0,25____0,25___________(mol)
\(n_{C2H4}=n_{Br2}=0,25\left(mol\right)\)
\(n_{hh}=\frac{7,84}{22,4}=0,35\left(mol\right)\)
\(\Rightarrow\left\{{}\begin{matrix}\%V_{C2H4}=\frac{0,25}{0,35}.100\%=71,43\%\\\%V_{C3H4}=\frac{0,05}{0,35}.100\%=14,29\%\end{matrix}\right.\)
\(\Rightarrow\%V_{CH4}=100\%-71,43\%-14,29\%=14,28\%\)