Chemistry - CHEMISTRY IN EVERYDAY LIFE Question with Solution | TestHub

$\to$ Molecular formula of Thyroxine $\Rightarrow$ ${\mathrm{C}}_{15}{\mathrm{H}}_{11}{\mathrm{O}}_4{\mathrm{NI}}_4$
$\to$ Molecular mass of Thyroxine -
$\begin{array}{rl}& \mathrm{C}\to 15\times 12=180\\ & \mathrm{H}\to 11\times 1=11\\ & \mathrm{O}\to 16\times 4=64\\ & \mathrm{N}\to 14\times 1=14\\ & \mathrm{I}\to 127\times 4=508\end{array}$
$\to$ Molecular mass of Thyroxine $\Rightarrow 777$
$\begin{array}{rl}& \to \%\text{ of Iodine }=\frac{508}{777}\times 100\\ & =65.38\%\end{array}$
Nearest integer $=65$