Chemistry: A Molecular Approach (3rd Edition)

Published by Prentice Hall
ISBN 10: 0321809246
ISBN 13: 978-0-32180-924-7

Chapter 1 - Sections 1.1-1.8 - Exercises - Cumulative Problems: 111b

Answer

$1.59 \times 10^{-2}$

Work Step by Step

1. Rearrange the numbers to have the same exponent part, and then we simply make a common addition and subtraction $1.87 \times 10^{-2} + 2 \times 10^{-4} -3 \times 10^{-3} =1.87 \times 10^{-2} + 0.02 \times 10^{-2} -0.3 \times 10^{-2} = 1.59 \times 10^{-2}$
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