Ar(Mg) = 24*0,7860 + 25*0,1011 + 26*0,1129 = 24,3269
№1
(C6H10O5)n->C6H12O6->C2H5OH->C4H8O2->CH3COOH->CH3COONa
(CH10O5)n+nH2O = nC6H12O6
C6H12O6 = 2 C2H5OH+2 CO2
C2H5OH + CH3COOH = C4H8O2 + H2O
C4H8O2 + H2O = C2H5OH + CH3COOH
CH3COOH + NaOH = CH3COONa +H2O
№2
C6H12O6->C2H5OH->C4H6->(- СН2 - СН = СН - СН2 -)n
C6H12O6 = 2 C2H5OH+2 CO2
C2H5OH = CH2=CH-CH=CH2+2 H2O+H2
nC4H6 = (- СН2 - СН = СН - СН2 -)n
1s2 2s2 2p6 3s2 3p6 4s2 4p3
Смотри электронную и графическую формулы