4P + 5O2= 2 P2O5
так же
2Al + 6HCl = 2AlCl3 + 3H2
2Al + 3S = Al2S3
1)6CO2+6H2O=C6H12O6+6O2
CH2OH-(CHOH)4-COH+H2=CH2OH-(CHOH)4-CH2OH
2)CH2OH(CHOH)4-COH+Ag2O=CH2OH-(CHOH)4-COOH+2Ag
CH2OH-(CHOH)4-COOH+NaOH=CH2OH-(CHOH)4-COONa+H2O
3)C6H12O6=2C2H5OH+2CO2
C2H5OH=C2H4+H2O
C6H12O6=H3C-CH-COOH+2CO2+2H2
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CH3
Cu2(OH)2CO3=2CuO + H2O + CO2