Răspuns:
MCO2=12+2×16=44g/mol
MH2O=2×1+16=18g/mol
44gCO...............12gC
0,88gCO2.............xgC
x= 0,88×12/44=0,24gC
18gH2O.............2g H
0,54gH2O.............ygH
y=0,54×2/18=0,06gH
0,3g hidrocarbura .................0,24gC.............0,06gH
100g hidrocarbura....................ag C...................bgH
a=100×0,24/0,3=80gC
b=100×0,06/0,3=20gH
C=80/12=6,67
H=20/1=20
impartim la 6,67
C=6,67/6,67=1
H≈3
formula bruta este CH3
(CH3)n=30
n=2
formula moleculara este: C₂H₆ - etan
Explicație: