# A pure copper sphere has a radius 0.929 in. How many copper atoms does it contain? (density of copper 8.96 #"g/cm"^3#)

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Jan 17, 2015

The answer is

So, start by converting inches to cm

Use this value to determine the volume of the sphere

Use density to determine the mass of copper

From here, you can determine the number of atoms you have by

I've used the fact that 1 mole of copper has

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