La arderea unei alchine se consuma o masa de 3.2 ori mai mare de O2 decat alchina. Aflati alchina

Răspuns :

CnH2n-2 + (3n-1)/2O2=nCO2 + (n-1)H2O

m,O2= nxM= (3n-1)/2x32 g

M,alchina= 14n-2

32(3n-1)/2=3,2x(14n-2)----> n=3---> propina, C3H4