Answer:
9.73 grams of iodine
Explanation:
First we calculate the molar mass of the tyroxine C₁₅H₁₇NO₄I₄:
M = 15 × 12 + 17 × 1 + 1 × 14 + 4 × 16 + 4 × 127 = 783 g/mole
The taking in account that 1 mole of tyroxine have 4 moles of iodine atoms (508 g) we devise the following reasoning:
if from 783 g of tyroxine we can extract 508 g of iodine
the from 15 g of tyroxine we can extract X g of iodine
X = (15 × 508) / 783 = 9.73 grams of iodine
