Answer
Please see the work below.
Work Step by Step
a. it is a homogeneous mixture because no impurities or different matter are involved.
b. It is a heterogeneous mixture because, the air may have clouds and other matter.
Chemistry 12th Edition
by Chang, Raymond; Goldsby, Kenneth
Published by
McGraw-Hill Education
ISBN 10:
0078021510
ISBN 13:
978-0-07802-151-0
Chapter 1 - Chemistry: The Study of Change - Questions & Problems - Page 33: 1.89
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