MH2O=18g/mol
n=m/M=9/18=0.5 moli H2O
1mol.........................................n moli
CnH2n +(3n/2)O2 ->nCO2 + nH2O
0.1moli...................................0.5 moli
0.5moli=0.1n moli ===>n=0.5/0.1 ==>n=5
NE=1
Formula moleculara este C5H10 (pentena)