formula: CnH2n-2
CnH2n-2 + 2Br2 -> CnH2n-2Br4
Mcompus=12n+2n-2+320=14n+318 g/mol
Mcompus........................100%
320............................82,474%
Mcompus=32000/82,474=388g
14n+318=388 => 14n=70 => n=5
f.m: C5H8
izomerii:
CH≡C-CH2-CH2-CH3
CH≡C-CH(CH3)-CH3
CH3-C≡C-CH2-CH3
a) formula moleculara: C5H8 - adevarat
b) adevarat, doar alchinele cu tripla legatura marginala reactioneaza cu Na
c) adevarat, singura alchina care prin aditie de apa formeaza aldehida, este etanalul (acetaldehida sau aldehida acetica)
d) adevarat, doar 2-pentina
e) fals, 2-pentina nu reactioneaza cu [Ag(NH3)2]OH