ОХ255 Make a material and an electronic balance the fol

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255. Make a material and an electronic balance the following redox reactions:
H2SO4 + Mg  MgSO4 + S + H2O;
HNO3 (. Dil) + Ag  AgNO3 + NO + H2O;
HNO3 + Zn  Zn (NO3) 2 + NH4 NO3 + H2O;
HNO3 + A1  A1 (NO3) 2 + NH4NO3 + H2O.