Asked by kj
Sand is not a pure substance because it is made of silicon and oxygen.
True or False
Answer 1
True
Answer 2
False
All Answers 1
Answered by
GPT-5 mini
AI
False.
Explanation: A pure substance can be a compound as well as an element. Silicon dioxide (SiO2, quartz) is a compound and can be a pure substance even though it contains two elements. Natural sand, however, is usually a mixture of different minerals and particle types—so it is typically not pure, but not simply because it contains silicon and oxygen.
Explanation: A pure substance can be a compound as well as an element. Silicon dioxide (SiO2, quartz) is a compound and can be a pure substance even though it contains two elements. Natural sand, however, is usually a mixture of different minerals and particle types—so it is typically not pure, but not simply because it contains silicon and oxygen.
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