Answer
$(5.98*10^{24})kg/40u\div(1.661*10^{-27})kg/u=9.0*10^{49} atoms$
Work Step by Step
The mass of earth is 5.98*10^24kg.
Convert the unit using 1u=1.661*10^-27 kg.
The number of atom=mass of earth/average mass of an atom.
Fundamentals of Physics Extended (10th Edition)
by Halliday, David; Resnick, Robert; Walker, Jearl
Published by
Wiley
ISBN 10:
1-11823-072-8
ISBN 13:
978-1-11823-072-5
Chapter 1 - Measurement - Problems - Page 10: 21
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