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  4. 2.76 g of silver carbonate on being strongly heated yields a residue weighing (in gram) (At. wt.: Ag =108, C =12, O=16)

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Q. $2.76 \,g$ of silver carbonate on being strongly heated yields a residue weighing (in gram) (At. wt.: $Ag =108, C =12$, $O=16)$

Some Basic Concepts of Chemistry

Solution:

$Ag _{2} CO _{3} \xrightarrow{\Delta} 2 Ag + CO _{2}+\frac{1}{2} O _{2}$
moles of $Ag _{2} CO _{3}=\frac{2.76}{276}=0.01$
moles of $Ag$ produced $=0.02$ moles
mass of $Ag$ produced $=0.02 \times 108=2.16 \,gm$