Chemistry 10th Edition

Published by Brooks/Cole Publishing Co.
ISBN 10: 1133610668
ISBN 13: 978-1-13361-066-3

Chapter 1 - The Foundations of Chemistry - Exercises - States of Matter - Page 37: 20

Answer

Coin is a heterogeneous mixture

Work Step by Step

In the given question it is specified that dirt or copper appeared only in a particular area. This means that the composition of gold and copper is not uniform throughout the coin. Hence it is a heterogeneous mixture.
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