Question

silver carbonate on decomposes gives the raction is

Answer 1

Unlike other metal carbonates that usually decomposes into metal oxides liberating carbon dioxide, silver carbonate on heating decomposes into elemental silver liberating mixture of carbon dioxide and oxygen gas as
Ag2CO3 (s) 2Ag (s) + CO2 (g) + 1/2 O2 (g)
MW = 276g 2 × 108 = 216 g
Hence, 2.76 g of Ag2CO3 on heating will give
216/276× 2.76 = 2.16 g Ag as residue.