a,
\(C_2H_2+2AgBr_2+2NH_3\rightarrow Ag_2C_2+2NH_4NO_3\)
\(C_2H_4+Br_2\rightarrow C_2H_4Br_2\left(1\right)\)
\(C_2H_2+2Br_2\rightarrow C_2H_2Br_4\left(2\right)\)
b,Ta có :
\(n_{C2H2}=n_{Ag2C2}=\frac{16,8}{240}=0,07\left(mol\right)\)
\(n_{Br2\left(2\right)}=2n_{C2H2}=0,14\left(mol\right)\)
\(\Rightarrow\Sigma n_{Br2}=0,2.1=0,2\left(mol\right)\)
\(\Rightarrow n_{Br2\left(1\right)}=0,2-0,14=0,06\left(mol\right)\)
\(\Rightarrow n_{C2H4}=0,06\left(mol\right)\)
\(\Rightarrow\%_{C2H2}=\frac{0,07}{0,13}.100\%=53,85\%\)
\(\Rightarrow\%_{C2H4}=100\%-53,85\%=46,15\%\)