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Rhanz9bo3ldenisaPeng Rhanz9bo3ldenisaPeng
  • 22-02-2017
  • Chemistry
Answered

The volume of a sphere is (4/3πr3 and the density of copper is 8.96g/cm3. part a what is the radius (in cm of a pure copper sphere that contains 1.59×1024 copper atoms?

Verified Answer :

wolf1728
wolf1728 wolf1728
  • 28-02-2017

Volume = 4/3 PI r^3

1.59 x 10^24 copper atoms = 2.64 moles of copper
Atomic Mass of copper = 63.55
2.64 63.55 = 167.77 grams of copper
Volume of Copper = Mass / Density
Volume of Copper = 167.77 grams / 8.96
Volume of Copper =

18.72 cubic centimeters

r^3 = Volume / (4/3
PI)
r^3 = 18.72 / 4.188
r^3 =



4.47
radius =
1.647 centimeters


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