Need help with chemistry!! 10 points?

  • Thread starter Thread starter gummybears
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gummybears

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If the atom is assumed to be a sphere, what is the volume in cm^3 of a single Kr atom? I'm a little stuck, this is what I have so far.

3.8 Angstroms * 10^-10 m/1 A * 100 cm/ 1 m --> (3.8 * 10^ -8cm)^3 -> 5.5*10-23


The answer is suppose to be 2.9*10^-23.. i need help. did i do something wrong?
 
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