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Charged Aluminum Spheres

  1. Sep 21, 2007 #1
    [SOLVED] Charged Aluminum Spheres

    1. The problem statement, all variables and given/known data
    Two small aluminum spheres, each of mass 0.0250 kilograms, are separated by 80.0 centimeters.

    How many electrons does each sphere contain? (The atomic mass of aluminum is 26.982 grams per mole, and its atomic number is 13.)

    2. Relevant equations
    Conversions from a chemistry course so long ago...

    3. The attempt at a solution
    .0250 kg * (1000g/1kg) = 25.0 g * (1 mole/26.982g) = .927 mole * (13 e- / mol) = 12 e-
     
  2. jcsd
  3. Sep 21, 2007 #2

    learningphysics

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    Homework Helper

    13 electrons/atom... not 13 electrons/mole.
     
  4. Sep 22, 2007 #3
    Nevermind, figured it out. ;)
     
    Last edited: Sep 22, 2007
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