Balance the following chemical equations: (a) FeSO4→ Fe2O3 + SO2 + SO3 (b) Pb(NO3)2(s) →PbO(s) + NO2(g) + O2

• 2FeSO4→ Fe2O3 + SO2 + SO3
• 2Pb(NO3)2(s) → 2PbO(s) + 4 NO2(g) + O2

Both in the presence of heat and decomposition reaction takes place