A Solution Is Prepared by Mixing 75 G of Methanol $\degree$

question 12

Multiple Choice

A solution is prepared by mixing 75 g of methanol (CH₃OH, 32.04 g/mol) with 25 g of ethanol (CH₃CH₂OH, 46.07 g/mol) .What is the mole fraction of ethanol in the vapor phase at 20 $\degree$ C?

• A)0.10
• B)0.12
• C)0.19
• D)0.32
• E)0.54

Comprehend the variation in sleep patterns across different age groups.

Grasp the basic theories and hypotheses related to the purpose and content of dreams.

Recognize the adaptive functions of sleep for different species.

Identify different sleep stages and their characteristics.

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