Chemistry - Stoichiometry Question with Solution | TestHub

5 g of a mixture of $\mathrm{Pb}{\left({\mathrm{NO}}_3\right)}_2$ \& ${\mathrm{NaNO}}_3$ was heated below $600^{\circ }\mathrm{C}$; till the weight of the residue becomes constant. If the loss in weight is $25\%$ of the initial mixture. The amount of $\mathrm{Pb}{\left({\mathrm{NO}}_3\right)}_2$ in the mixture is ${\mathrm{W}}_{\mathrm{gm}}$. ∴ $\mathrm{W}\times 100\mathrm{is}{\mathrm{Y}}_{\text{gms }}$. The value of Y is (At. Weight of $\mathrm{Pb}=207,\mathrm{Na}=23,\mathrm{N}=14,\mathrm{O}=16$ )