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a) mrówczan sodu HCOONa
2HCOOH + 2Na = 2HCOONa + H2
b) azotan magnezu Mg(NO3)2
Mg + 2HNO3 = Mg(NO3)2 + H2
mozna równiez i tak
MgO + 2HNO3 = Mg(NO3)2 + H2O
Mg(OH)2 + 2HNO3 = Mg(NO3)2 +2 H2O
Na2O + 2HCOOH = 2HCOONa + H2O
NaOH + HCOOH = HCOONa + H2O
2HNO3 + Mg--->Mg(NO3)2 + H2