Question

Urgent daca se poate,va rog mult!

Answer 1

4.2.. F.g alcani : CnH2n+2 ; nr atomi C alcan = nr atomi alchena

%C=mC/M*100 => 83,72=12n/14n+2*100 => 1200n=1172,08n+167,44 => n=6 

F.M alchena = C6H12 -> hexena

a) --
 
b) 
C-C=C-C-C -> 4-metil-2-pentena
               | 
              C
mai cauta tu..

c) C=C-C-C-C-C 

C-C=C-C-C-C

C-C-C=C-C-C