Chemistry - Stoichiometry Question with Solution | TestHub

When 20.0 g of white solid $(\mathbf{X})$ was heated, a solid ' $\mathbf{Y}$ ' and 4.4 g of acid gas (A) that turned lime water milky was driven off together with 1.8 g of a gas (B) which condenses to a colourless liquid. The solid (Y) that remained is dissolved in water to give an alkaline solution, with which excess barium chloride solution gave a white ppt (Z). The ppt effervesced with acid giving off carbon dioxide. If total number of electrons present in one molecule/formula unit of $(\mathbf{X})$ is $(\mathrm{P})$, then the value of $\frac{\mathrm{P}}{10}$ is