\(C_2H_2+AgNO_3+NH_3->C_2Ag_2+NH_4NO_3\\ CH_2=CH-CH_3+Br_2->CH_2Br-CHBr-CH_3\\ n_{C_2Ag_2}=0,325mol=n_{C_2H_2}\\ m_{C_2H_2}=8,45g\\ n_{Br_2}=n_{C_3H_6}=\dfrac{32}{160}=0,2mol\\ m_{C_3H_6}=8,4g\\ m_{CH_4}=20-8,45-8,4=3,15g\\ n_{CH_4}=0,196875mol\\ n_{hh}=n_{CH_4}+n_{C_2H_2}+n_{C_3H_6}=0,721875mol\\ \%V_{C_3H_6}=\dfrac{0,2}{n_{hh}}.100\%=27,71\%\\ \%V_{C_2H_2}=\dfrac{0,325}{n_{hh}}.100\%=45,02\%\\ \%V_{CH_{_34}}=27,27\%\)