2.76 g of silver carbonate on being strongly heated yield a residue weighing

2Ag2CO3  →Δ 4Ag+2CO2+O22× 276  gm→   4  ×  108  gm of Ag∵   2× 276  gm  of Ag2CO3  gives 4  ×  108  gm of Ag ∴   2.76 gm  of Ag2CO3  gives  4  ×  108 ×  2.762 × 276 = 2.16  gm of Ag