CnH2n+2 +Br2=CnH2n+1Br+HBr
1 1 1
m(Br)=21,8-6=15,8;n(Br)=15,8:160=0,1975;n(CnH2n+2)=0,1975;
M(CnH2n+2)=6:0,1975=30;
12n+2n+2=30
14n=28
n=2
ответ:С2Н6-этан.
CnH2n+2 +Br2=CnH2n+1Br+HBr
1 1 1
m(Br)=21,8-6=15,8;n(Br)=15,8:160=0,1975;n(CnH2n+2)=0,1975;
M(CnH2n+2)=6:0,1975=30;
12n+2n+2=30
14n=28
n=2
ответ:С2Н6-этан.