Multiple Choice
Which one of the following is not a greenhouse gas?
1. Intro to General Chemistry
Classification of Matter
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Which of the following is a pure substance?
A
Air
B
Gold
C
Sand
D
Saltwater
Verified step by step guidance1
Understand the definition of a pure substance: A pure substance is a form of matter that has a constant composition and properties throughout. It can be an element or a compound.
Identify the options given: Air, Gold, Sand, and Saltwater.
Analyze each option: Air is a mixture of gases, Sand is a mixture of different minerals, and Saltwater is a mixture of salt and water.
Recognize that Gold is an element, which is a type of pure substance because it consists of only one type of atom.
Conclude that among the given options, Gold is the only pure substance as it has a uniform composition and distinct properties.
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