The Addition of 125 Mg of Caffeine to 100 G

question 29

Multiple Choice

The addition of 125 mg of caffeine to 100 g of cyclohexane lowered the freezing point by 0.13 K.Calculate the molar mass of caffeine.The k_f for cyclohexane is 20.1 K.kg.mol^-1.

• A)47.8 g.mol^-1.
• B)481 g.mol^-1.
• C)96.5 g.mol^-1.
• D)19.3 g.mol^-1.
• E)193 g.mol^-1.

---

Definitions:

Elastic Fibers

Protein fibers in connective tissue that have the ability to stretch and return to their original shape, contributing to the elasticity of organs and tissues.

Reticular Fibers

Fine, branching fibers composed of collagen and glycoproteins, forming a supportive network in various tissues.

Tensile Strength

The maximum stress that a material can withstand while being stretched or pulled before failing or breaking.

Gas Exchange

The biological process through which organisms exchange oxygen and carbon dioxide with their environment, critical for respiration.