Answer
$5\times10^2\ mg$
Work Step by Step
$\frac{6mg}{kg}\times\frac{1\ kg}{2.205\ lb}\times185\ lb=503.401\ mg=5\times10^2\ mg$
Estimate:
$6\div2=3$
$3\times185=555\ mg$
Chemistry: The Central Science (13th Edition)
by Brown, Theodore E.; LeMay, H. Eugene; Bursten, Bruce E.; Murphy, Catherine; Woodward, Patrick; Stoltzfus, Matthew E.
Published by
Prentice Hall
ISBN 10:
0321910419
ISBN 13:
978-0-32191-041-7
Chapter 1 - Introduction: Matter and Measurement - Exercises - Page 37: 1.53b
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