Fe2O3 +2 H2 = 3H2O + 2Fe
3PbO + 2Al = Al2O3 + 3Pb
Cr2O3 +3 Mg = 3MgO + 2Cr
2Al + 6H2O = 2Al(OH)3 +3 H2
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Fe2O3 +2 H2 = 3H2O + 2Fe
3PbO + 2Al = Al2O3 + 3Pb
Cr2O3 +3 Mg = 3MgO + 2Cr
2Al + 6H2O = 2Al(OH)3 +3 H2