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  Balance the following chemical equation.
Fe(s) +H2O(g) = Fe3O4 + H2(g)
MnO2 + HCL = MnCl2 + Cl2 + H2O
HNO3 + Ca(OH)2 = Ca(NO3)2 + H2O
Answer :
3 Fe(s) +4H2O(g)                           Fe3O4 + 4H2(g)
MnO2 + 4HCL                              MnCl2 + Cl2 + 2H2O
2HNO3 + Ca(OH)2                        2Ca(NO3)2 +2H 2O

check the balanced equation , if any mistake , please mention it 

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