Question

Составьте пары соответствия

Na+S=Na2S                                                      n(A):n(B):n(C):n(D)=2:1:1:2
Na2O+H2O=NaOH                                          n(A):n(B):n(C):n(D)=2:2:2:1     
Na+H2O=NaOh+H2                                        n(A):n(B):n(C)=1:1:2 
Na+O2=Na2O                                                    n(A):n(B):n(C)=4:1:2
NaOh+H2SO4=Na2SO4+H2O                       n(A):n(B):n(C)=2:1:1    

Answer 1

1. 5)
2. 3)
3. 2)
4. 4)
5. 1)