The Mask of an Empty Flask Is 17

question 18

Multiple Choice

The mask of an empty flask is 17.4916 g, and its mass when filled with water at 20.0°C (density = 0.9982 g/mL) is 43.9616 g. The density of "heavy water" at 20.0°C is 1.1053 g/mL. What is the mass of the flask when filled with heavy water at 20.0°C?

• A) 29.2573 g
• B) 46.8016 g
• C) 46.7489 g
• D) 29.3100 g
• E) 43.9140 g

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Definitions:

Antidepressant

A class of drugs designed to alleviate symptoms of depression by adjusting the chemical imbalances of neurotransmitters in the brain.

Agonist

A drug that mimics or increases a neurotransmitter’s effects.

Antagonist

An antagonist is a substance that blocks or dampens the effects of a neurotransmitter or hormone, or a character in a story who opposes the protagonist.

Neurotransmitter

Substances that carry messages from one nerve cell to another through the synaptic gap within the nervous system.