Viết phương trình hóa học

1.CuO + HNO3 ->                                                                 2. MgSO4 + Na2CO3 ->

3. NaOH + CuCl2 ->                                                             4. CaCO3 + HCl ->

5. Na2SO4 +        ->        + NaOH                                         6. Ba(OH)2 +           ->                      + H2O

7. Ba(OH)2 +      -> NaOH +                                                8. Mg +         ->                      + H2

9. CaCO3 ->      +                                                                  10. K2CO3 + Ba(NO3)2 ->