1.
a) CH3-CH=C(CH3)-CH2-CH3
b) CH2=CH-C(CH2-CH3)-CH2-CH3
2.
CnH2n + H2 = CnH2n+2
14g alchena .....3,733 l H2
A ...................... 22,4 l H2
A = 84 g alchena, unde A reprezinta masa molara a alchenei
CnH2n = 84
12n+2n = 84
14 n = 84
n = 6
Alchena este hexena, C6H12.
