Answer
The correct answer is (a).
Work Step by Step
The chemist witnesses a chemical reaction. This is an observation. So, the correct answer is (a).
Chemistry: Molecular Approach (4th Edition)
by Tro, Nivaldo J.
Published by
Pearson
ISBN 10:
0134112830
ISBN 13:
978-0-13411-283-1
Chapter 1 - Self-Assessment Quiz - Page 33: Q1
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