# Chapter 1 - Introduction: Matter and Measurement - Exercises: 1.12

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This question wants us to discuss whther or not a sample of agate is a compound or not. A compound is a pure substance made up of two or more elements in the same chemical bond formation. Technically, both viewpoints are right. Agate is technically a compound made up of quartz (also known as Si$O_{2}$. However, this sample is not chemically pure, represented by the fact that it does not look uniform throughout. This means that this sample of agate isn't inherent a chemical compound, it contains different elements in different arrangements.

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