A certain atom has a radius of 2.7 X 10-1 nm and a mass of 2.21 X 10-22 g.  What is the density of the atom? Assume that the atom is a sphere.

Physics for Scientists and Engineers: Foundations and Connections
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Author:Katz, Debora M.
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Chapter15: Fluids
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A certain atom has a radius of 2.7 X 10-1 nm and a mass of 2.21 X 10-22 g.  What is the density of the atom?

Assume that the atom is a sphere.  The volume of a 
sphere is given by:

?=43??3V=43πr3     where r is the radius and ?=3.14

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