Multiple Choice
At approximately what temperature does sodium chloride (NaCl) melt?
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1. Intro to General Chemistry
Physical Properties
Multiple Choice
Which of the following physical properties is commonly used to help identify and classify materials?
A
Reactivity with acids
B
Ability to conduct electricity
C
Color
D
Density
Verified step by step guidance1
Understand that physical properties are characteristics of a substance that can be observed or measured without changing the substance's chemical identity.
Review the options given: Reactivity with acids is a chemical property because it involves a chemical change.
Ability to conduct electricity is a physical property, but it is not as commonly used as density for identifying materials.
Color is a physical property but can be subjective and less reliable for classification due to variations and impurities.
Density, defined as mass per unit volume (\[\text{Density} = \frac{\text{Mass}}{\text{Volume}}\]), is a consistent and measurable physical property widely used to identify and classify materials.
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