2С3H4+2H2=C3H6+C3H8 n C3H4=4/40=0.1 моль C3H8+C3H6+Br2=C3H8+C3H6Br2 m Br2=100*0.32\%=3.2 г n Br2=3.2/80=0.04 моль m C3H6=0.04*42=1.68 г n C3H8=0.1-0.04=0.06 моль m C3H8=0.06*44=2.64 г m C3H8+C3H6=1.68+2.64=4.32 г массовая доля пропана=2.64/4.32=0.611*100\%=61\%