Question

(NH4)2 CO3->
(NH4)2 SO4+NaOH->
(NH4)2 SO4+BaCl2->

Answer 1

(NH4)2CO3 + 2 HCl = CO2 + H2O + 2 NH4Cl
(NH4)2SO4 + BaCl2 = BaSO4 + 2 NH4Cl
NH4Cl + NaOH = H2O + NH3 + NaCl
(NH4)2CO3 + 2 H2O = H2CO3 + 2 NH4OH.

Answer 2

H2O+CO2+2NH3
Na2SO4+2NH3+2H2O
BaSO4+2NH4Cl