Помогите пожалуйста
Нужно ионное уравнение
1)H2S+NaOH=Na2S+2H2O
2)H2S+MgO=MgS+H2O
3)H2S+ZnO=ZnS+H2O
4)H2S+Ca=CaS+H2
5)H2S+Cu(NO3)2=CuS+2HNO3
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