What Is the Mole Fraction of Water in a Solution

question 55

Multiple Choice

What is the mole fraction of water in a solution that contains 8.0 mol of ethanol (C₂H₅OH) and 1.6 mol of water?

• A)0.17
• B)0.08
• C)0.50
• D)0.20
• E)0.83

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Definitions:

Conditioned Response

A learned response to a previously neutral stimulus that has become associated with another stimulus.

Extinction

In the field of psychology, the slow reduction and eventual vanishing of a learned response when the previously associated conditioned stimulus is not presented together with the unconditioned stimulus anymore.

Classical Conditioning

An associative learning framework in which a response initially evoked by a second stimulus becomes elicited by the first stimulus alone due to repeated pairings of the stimuli.

Spontaneous Recovery

The reappearance of a previously extinguished response after a period of no exposure to the conditioned stimulus.