Ответ: СnH(2n-6) + Br2 -(FeBr3)-> CnH(2n-5)Br + HBr m теор(CnH(2n-5)Br)=35,82/0,75=47,76г 28,8/(12n+2n-6) = 47,76/(12n+2n-5+80) 28,8*(14n+75) = 47,76/(14n-6) 403,2n+2160 = 668,64n-286,56 265,44n = 2446,56 n = 9 C9H13 — фенилпропан