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Which of the following physical properties is commonly used to help identify and classify materials?
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1. Intro to General Chemistry
Physical Properties
Scelta multipla
Which of the following is closest to the melting point of ammonia (NH_3)?
A
-77^\(\text{o}\)C
B
-33^\(\text{o}\)C
C
-78^\(\text{o}\)C
D
0^\(\text{o}\)C
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Understand that the melting point of a substance is the temperature at which it changes from solid to liquid under standard pressure.
Recall or look up the known physical properties of ammonia (NH_3), specifically its melting point.
Compare the given options (-77°C, -33°C, -78°C, 0°C) to the known melting point of ammonia.
Note that ammonia has a melting point close to -78°C, which is a well-documented value in chemistry references.
Identify the option closest to this known value, which is -78°C, as the correct answer.
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