Answer to Question #306692 in General Chemistry for zaverya

Question

22. 2.76 g of silver carbonate on being heated yields a reduce weigh

a) 2.32 g b) 3.32 g c) 1.36 g d) 0.32 g 

Answer 1

Ag2​CO3​(s)→2Ag(s)+CO2​(g)+2
1​O2​(g)
Molecular Weight of Ag2​CO3​=276 g
And, molecular weight of Ag=2×108=216 g
276 g of Ag2​CO3​ give 216 g Ag.
Therefore, 2.76 g of Ag2​CO3​ on heating will give 276
216​×2.76 g=2.16 g Ag as residue

= 2.16 g