Răspuns :
Formula generala : CnH2n+2O
Transform raportul maselor in raport molar: nC/ nH
64,86g/12g/mol= 13,51g/1 g/mol-----.>nC/nH=5,40/13,56--->1/2,5
Acest raport se regaseste in formula moleculara; n/ 2n+2=1/2,5 ---->n=4
CH3-CHOH-CH2-CH3 2 BUTANOL
Transform raportul maselor in raport molar: nC/ nH
64,86g/12g/mol= 13,51g/1 g/mol-----.>nC/nH=5,40/13,56--->1/2,5
Acest raport se regaseste in formula moleculara; n/ 2n+2=1/2,5 ---->n=4
CH3-CHOH-CH2-CH3 2 BUTANOL
100-64,86-13,51=21,63%O
Aflam formula brută:
C 64,86/12=5,405
H 13,51/1=13,51
O 21,63/16=1,35 impartim rezultatele obt.la cel m mic adică 1,35 si ibt formula bruta (C4H10O)n,textul spune monoalcool deci un singur O rezulta n din formula bruta=1 deci avem 2-butanol sau sec-butanol.