Răspuns:
Explicație: A+3/2O2=CO2+H2O
MA=62 MCO2=44
mA=1,55g MH2O=18
mCO2=3,3,g 44g CO2....12g.C...32gO
mH2O=1,8 g 3,3 x y
x=0,9 g
y =2,4 g
18 g ..........2gH......16gO
1,8..........z............t
z=o,2 g t=1,6 g
mO= 2,4+1,6=4 g
5,1 g......0,9 g C .......0,2 GH 4 g O
100 x y z
x=17,64 % c
y= 3,92 %H
z=78,43 % O
C=17,64/12=1,74:1,74=1 M (CO3H2)n=12n+3*16n+2n=62
O= 78,64/16=4,9:1,74=2,8 62n=62
H3,92/1=3,92:1,74=2,25 n=1 CH2O3
HO- C=0
OH