Answer
This means that a cheese sandwich is a mixture.
Work Step by Step
The sandwich consists of two different substances (cheese and bread), one of which (bread) is composed of more basic ingredients.
Chemistry: An Introduction to General, Organic, and Biological Chemistry (12th Edition)
by Timberlake, Karen C.
Published by
Prentice Hall
ISBN 10:
0321908449
ISBN 13:
978-0-32190-844-5
Chapter 3 - Section 3.1 - Classification of Matter - Questions and Problems - Page 61: 3.2c
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