Chemistry and Chemical Reactivity (9th Edition)

Published by Cengage Learning
ISBN 10: 1133949649
ISBN 13: 978-1-13394-964-0

Chapter 1 Basic Concepts of Chemistry - 1-3 Classifying Matter - Review & Check for Section 1-3 - Page 10: 1

Answer

1.a) Dry ice consists of only solid CO2 (Carbon dioxide) and is therefore considered a pure substance.

Work Step by Step

9 K Gold is a mixture of various metals, which can include bronze, brass, steel, and so on. Dry air is a mixture of elements such as Nitrogen and Oxygen. Blood consists of plasma, which is made up of a mixture of salts, water, and proteins. None of these can, therefore, be considered pure.
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