It Takes 254 KJ/mol to Eject Electrons from a Certain

question 117

Multiple Choice

It takes 254 kJ/mol to eject electrons from a certain metal surface. What is the longest wavelength of light (nm) that can be used to eject electrons from the surface of this metal via the photoelectric effect _ _ ?

• A) 233
• B) 472
• C) 165
• D) 552
• E) 725

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Definitions:

Little Albert

An experiment conducted by John B. Watson and Rosalie Rayner that demonstrated classical conditioning in humans, specifically showing how a child could be conditioned to fear a white rat.

Counterconditioning

A behavior therapy technique that involves replacing an undesirable response to a stimulus with a more desirable one.

Conditioned Stimulus

A previously neutral stimulus that, after being paired with an unconditioned stimulus, comes to trigger a conditioned response.

Unwanted Conditioned Response

A learned response that is undesirable or negative, which occurs after conditioning to an initially neutral stimulus.