Thyroxine, an Important Hormone That Controls the Rate of Metabolism $\circ$

question 119

Multiple Choice

Thyroxine, an important hormone that controls the rate of metabolism in the body, can be isolated from the thyroid gland. If 0.455 g of thyroxine is dissolved in 10.0 g of benzene, the freezing point of the solution is 5.144 ^$\circ$ C. Pure benzene freezes at 5.444 ^$\circ$ C and has a K_f of 5.12 ^$\circ$ C/m. What is the molar mass of thyroxine

• A) 777 g/mol
• B) 787 g/mol
• C) 797 g/mol
• D) 807 g/mol
• E) None of the above

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Definitions:

Social Recognition

Acknowledgment or appreciation of an individual's presence, achievements, or status by others within a social or professional group.

Informal Acknowledgement

Recognition or appreciation of an individual's efforts or achievements in a casual, non-official manner.

Peer Recognition

The acknowledgment and appreciation of an individual's work or achievements by their colleagues and peers, often serving as a motivational tool.

Negative Reinforcement

A behavioral principle where the removal of an unfavorable condition strengthens a behavior.