Answer
4.0 x $10^5$
Work Step by Step
One zero must be included after the decimal point to indicate that there are two significant figures in the value.
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 2 - Section 2.2 - Measured Numbers and Significant Figures - Questions and Problems - Page 30: 2.18c
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