A Solution Is Prepared by Mixing 50 G of Methanol

question 16

Multiple Choice

A solution is prepared by mixing 50 g of methanol (CH₃OH) with 50 g of ethanol (CH₃CH₂OH) . Use the following data to determine the vapor pressure of this solution at 20°C. $\begin{array}{cc} \text { Substance }&\text { Vapor Pressure }\\& \text { at } \mathbf{2 0 ^ { \circ }} \mathbf{C} \text { (torr) } \\\text { Methanol } & 92 \\\text { Ethanol } & 45\end{array}$

• A) 69 torr
• B) 57 torr
• C) 80 torr
• D) 73 torr
• E) 83 torr

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Definitions:

Learned Helplessness

A condition in which a person or animal fails to attempt escape from an unpleasant situation because of a history of repeated failures in the past.

Prototype

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Attributes

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Tolman's View

An approach in psychology proposed by Edward C. Tolman that emphasizes the role of cognition and purposive behavior in understanding learning.