Объяснение:
S+O2=SO2
SO2+H2O=H2SO3
H2SO3+Ca(OH)2=CaSO3+2H2O
4Fe+3O2=2Fe2O3
Fe2O3+6HCl=2FeCl3+3H2O
FeCl3+3NaOH=Fe(OH)3+3NaCl
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Объяснение:
S+O2=SO2
SO2+H2O=H2SO3
H2SO3+Ca(OH)2=CaSO3+2H2O
4Fe+3O2=2Fe2O3
Fe2O3+6HCl=2FeCl3+3H2O
FeCl3+3NaOH=Fe(OH)3+3NaCl