Chemistry - Mole Concept Question with Solution | TestHub

A 15 g pharmaceutical sample containing Coumadin $\left({\mathrm{C}}_{19}{\mathrm{H}}_{16}{\mathrm{O}}_4\right)$ is treated with alkaline ${\mathrm{I}}_2$, converting Coumadin completely to iodoform $\left({\mathrm{CHI}}_3\right)$ such that 1 mole Coumadin produce $1\mathrm{mol}{\mathrm{CHI}}_3$. The iodoform formed is then reacted with excess ${\mathrm{AgNO}}_3$ to precipitate iodine as AgI according to

${\mathrm{CHI}}_3+3{\mathrm{AgNO}}_3+{\mathrm{H}}_2\mathrm{O}\to 3\mathrm{AgI}+3{\mathrm{HNO}}_3+\mathrm{CO}$

If 10.575 g of AgI is obtained, calculate the mass percent of Coumadin in the sample. (Given : Atomic mass : I = 127 g mol^-1 ; Ag = 108 g mol^-1 ; O = 16 g mol^-1 ; N = 14 g mol^-1 ; C = 12 g mol^-1 ; H = 1 g mol^-1 )