Multiple Choice
Air can be considered a mixture. Which statement does NOT help explain why?
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1. Intro to General Chemistry
Classification of Matter
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Air can be considered a mixture. Which statement best describes air?
A
Air is a combination of different substances that retain their individual properties.
B
Air is a homogeneous element found naturally in the atmosphere.
C
Air is a pure substance composed of a single type of molecule.
D
Air is a compound formed by a chemical reaction between nitrogen and oxygen.
Verified step by step guidance1
Understand the definition of a mixture: A mixture consists of two or more substances physically combined, where each substance retains its own chemical properties.
Recognize that air is composed mainly of nitrogen, oxygen, and other gases physically combined, not chemically bonded.
Recall that a pure substance contains only one type of particle, either an element or a compound, which is not the case for air.
Note that a compound is formed when elements chemically react to form a new substance with different properties, which does not apply to air.
Conclude that air is best described as a combination of different substances that retain their individual properties, making it a mixture.
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