Balance the following chemical equations:
(a) 
(b) 
(a) 
Ferrous sulphate decomposed to ferric oxide, Sulphur dioxide and Sulphur trioxide.
(b) 2Pb(NO3)2(s) 
2PbO (s) + 4NO2 (g) + O2 (g)
Lead (II) nitrate decomposes into lead mono oxide, nitrogen dioxide and oxygen gas.
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