Chemistry: An Introduction to General, Organic, and Biological Chemistry (12th Edition)

Published by Prentice Hall
ISBN 10: 0321908449
ISBN 13: 978-0-32190-844-5

Chapter 2 - Section 2.3 - Significant Figures in Calculations - Questions and Problems - Page 33: 2.28b

Answer

$$189.79 \space cm$$

Work Step by Step

1. Perfom the calculation: $$85.66 \space cm + 104.10 \space cm + 0.025 \space cm = 189.785 \space cm$$ 2. Identify the number of decimal places that the measurement with the fewest decimal places have. - It is 2 decimal places, from $85.66$ or $104.10$ 3. Round off the sum to 2 decimal places: $$189.785 \space cm \longrightarrow 189.79 \space cm$$
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