Verified answer

Zn == ZnO == Zn(NO3)2 == ZnO == ZnSO4

1. 2Zn + O2 == 2ZnO

2. ZnO + 2HNO3 == Zn(NO3)2 + H2O

3. 2Zn(NO3)2 == 2ZnO + 4NO2 + O2

4. ZnO + H2SO4 == ZnSO4 + H2O

K == KOH == K2SO4 == KCl == AgCl

1. 2K + 2H2O == 2KOH + H2↑

2. 2KOH + SO3 == K2SO4 + H2O

4. K2SO4 + BaCl2 == BaSO4↓ + 2KCl

5. KCl + AgNO3 == KNO3 + AgCl↓