When 200 Grams of an Unknown Compound Are Dissolved in 500

question 42

Multiple Choice

When 20.0 grams of an unknown compound are dissolved in 500. grams of benzene, the freezing point of the resulting solution is 3.77 ^$\circ$ C. The freezing point of pure benzene is 5.444 ^$\circ$ C, and the K_f for benzene is 5.12 ^$\circ$ C/m. What is the molar mass of the unknown compound

• A) 110 g/mol
• B) 120 g/mol
• C) 130 g/mol
• D) 140 g/mol
• E) None of the above

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Definitions:

Token Economy

A behavior modification system that uses tokens as reinforcement for desired behaviors, which can be exchanged for rewards.

Token-Storage System

A behavioral modification system where tokens are earned for desired behaviors and can later be exchanged for rewards.

Peer Pressure

The influence exerted by a peer group, encouraging individuals to change their attitudes, values, or behaviors to conform to group norms.

Positive Reinforcement

A learning process in which a behavior is followed by a desirable consequence, strengthening the likelihood that the behavior will be repeated.