The Mole Fraction of Potassium Nitrate in an Aqueous Solution

question 150

Multiple Choice

The mole fraction of potassium nitrate in an aqueous solution is 0.0194. The solution's density is 1.0627 g/mL. What is the molarity of KNO₃ in the solution?

• A) 0.0194 M
• B) 0.981 M
• C) 1.05 M
• D) 1.96 M
• E) 19.4 M

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Definitions:

Fear Conditioning

A behavioral paradigm in neuroscience and psychology where organisms learn to predict aversive events, developing a conditioned response to a previously neutral stimulus.

Human Infant

A very young offspring of a human, typically considered to be from birth to one year of age.

Backward Pairing

A conditioning procedure where the conditioned stimulus is presented after the unconditioned stimulus, often leading to weaker learning.

Simultaneous Pairing

A learning method where two stimuli are presented at the same time to create an association between them.