Chapter 4.6, Problem 2CP

A 10.0-g sample of an unknown ionic compound is dissolved, and the solution is treated with enough ${\text{AgNO}}_{\text{3}}$ to precipitate all the chloride ion. If 30.1 g of $\text{AgCl}$ is recovered, which of the following compounds could be the unknown?

$\begin{array}{l}\text{a)}\hfill \\ \text{NaCl}\hfill \\ \text{b)}\hfill \\ {\text{NaNO}}_{\text{3}}\hfill \\ \text{c)}\hfill \\ {\text{BaCl}}_{\text{2}}\hfill \\ \text{d)}\hfill \\ {\text{MgCl}}_{\text{2}}\hfill \\ \text{e)}\hfill \\ \text{KCl}\hfill \end{array}$