Răspuns:
niu,apa= m/M= 108/18mol=6mol
CnH2n-2 ardere......> nCO2 + (n-1)H2O
M,alchina= 14n-2 , g/mol
(14n-2) g alchina.........................(n-1)moli H2O
120g......................................................6mol
6(14n-2)=120(n-1)---> n=3, propina
CH≡C-CH3+H2--> CH2=CH-CH3 PROPENA
CH≡C-CH3+ Cl2---> CHCl =CCl-CH3 1,2 dicloropropena
CHCl=CCl-CH3 + Cl2----> CHCl2-CCl2-CH3 1,1,2,2,tetracloropropan
CH≡C-CH3+HCl---> CH2=CCL-CH3 2cloropropena
Explicație:
