a$)$ Molar concentration of $200\mathrm{.}0m\frac{g}{L}{C}^{2+}=$

$x{10}^{-3}$ mol$\frac{e}{L}$

b$)$ Molar concentration of $1\mathrm{.}0m\frac{g}{L}{F}^{-}=$

${10}^{{?}^{{?}^{?}}}-5$mol$\frac{e}{L}$

c$)$ Soluble $F^{-}$at equilibrium $={10}^{{?}^{{?}^{?}}}-5$mol$\frac{e}{L}$

One of the answers is wrong please work it out. Thank you