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3 + 23 = (3)2 +

+ 2 + 2

+ 2 = 2

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H2S + O2 -> SO2 + H2O

2S+SO2 -> H2SO4 + S

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N2 + O2 -> NO

NO + O2 -> NO2

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Fe2O3 + CO ->

Cu2O + C ->

Cr2O3 + Al ->

MnO2 + Al ->

V2O5 + H2 ->

WO3 + H2 ->

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  • + 2 -> 25

  • + 3 -> 25 + +

  • S + KClO3 -> SO2 + +


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