When a sample of the aqueous layer with a volume of $14\mathrm{.}73mL$ is collected, it

requires $19\mathrm{.}33mL$ of a titrant solution of $S_2{O}_3^{2-}$ with a concentration of $0\mathrm{.}01387M$

to reach the endpoint. The reaction has a $2$:$1$ mole ratio of thiosulfate to all

reducible iodine species. Calculate the concentration of total reducible iodine $($in

$mo\frac{l}{L})$ in the aqueous layer. Include only the numerical answer $($no units$).$