Combustion Analysis of a 22

question 131

Multiple Choice

Combustion analysis of a 22.0 mg sample of the painkiller morphine produced 13.2 mg of water.What is the percentage by mass of hydrogen in morphine?

• A)6.71%
• B)3.36%
• C)13.4%
• D)60.0%

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Definitions:

Metronome

A device used to mark time at a selected rate by giving a regular tick sound.

Biscuit

A baked food item, typically flour-based, that varies significantly between regions; in the U.S., it refers to a soft bread roll, while in the U.K. it is akin to what Americans call a cookie.

Extinction

In psychology, the gradual weakening and eventual disappearance of a conditioned response when the conditioned stimulus is repeatedly presented without the unconditioned stimulus.

CR Fading

A technique in classical conditioning by which the conditioned response (CR) is gradually weakened by presenting the conditioned stimulus (CS) without the unconditioned stimulus (US).