m(C)=13.2*12/44=3.6g
m(H)=7.2*2/18=0.8g
m(O)=6-3.6-0.8=1.6g
calculam niu
ν(C)=3.6/12=0.3 mol
ν(H)=0.8/1=0.8 mol
ν(O)=1.6/16=0.1 mol
deci formula bruta este
C3H8O
M(comp)=D*M(aer)=2.07*29=60 g/mol
M(C3H8O)=12*3+1*8+16*1=36+8+16=60 g/mol
deci formula moleculara este tot C3H8O
2 izomeri de alcool
1-propanol si 2-propanol