1.б,в,г.
2.N(-3)H(+1)N(+5)O(-2).
3.N2+Ca=Ca3N2
NH3+NaOH=NH3+NaOH=NaNH2 + H2O
HNO3+NH3=NH4NO3
CaO+HNO3=2H2O + 2 Ca
Al(OH)3+HNO3= Al(NO3)3 + 3H2O
4)2HNO3 + Fe --> Fe(NO3)2 + H2
Fe(NO3)2 + 2NaOH --> Fe(OH)2 + 2NaNO3
Fe(OH)2 + H2O --> FeO + 2H2O
4FeO →(t) Fe3O4 + Fe
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Answers & Comments
1.б,в,г.
2.N(-3)H(+1)N(+5)O(-2).
3.N2+Ca=Ca3N2
NH3+NaOH=NH3+NaOH=NaNH2 + H2O
HNO3+NH3=NH4NO3
CaO+HNO3=2H2O + 2 Ca
Al(OH)3+HNO3= Al(NO3)3 + 3H2O
4)2HNO3 + Fe --> Fe(NO3)2 + H2
Fe(NO3)2 + 2NaOH --> Fe(OH)2 + 2NaNO3
Fe(OH)2 + H2O --> FeO + 2H2O
4FeO →(t) Fe3O4 + Fe