## Question

###### Thyroxine, an important hormone that controls the rate of metabolism in the body, can be isolated from the thyroid gland. When 0.455 g thyroxine is dissolved in 10.0 g benzene, the freezing point of the solution is depressed by $0.300^{\circ} \mathrm{C}$ . What is the molar mass of thyroxine? See Table $11.5 .$

Thyroxine, an important hormone that controls the rate of metabolism in the body, can be isolated from the thyroid gland. When 0.455 g thyroxine is dissolved in 10.0 g benzene, the freezing point of the solution is depressed by $0.300^{\circ} \mathrm{C}$ . What is the molar mass of thyroxine? See Table $11.5 .$

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