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Homework Help: Mass of copper atom

  1. Jan 27, 2013 #1
    Can someone please help me on this physics question

    The mass of a copper atom is 2.50 10-25 kg, and the density of copper is 8 920 kg/m3 .

    (a) Determine the number of atoms in 1 cm3 of copper.

    (b) Visualize the one cubic centimeter as formed by stacking up identical cubes, with one copper atom at the center of each. Determine the volume of each cube.

    (c) Find the edge dimension of each cube, which represents an estimate for the spacing between atoms.

    For part (a) i got 8.72 * 10^21 however my answers differs from the correct answer by more than 10%

    Please could someone help me on this question.

    It's much appreciated

    Thanks to anyone and everyone who responds to this (in advance)
  2. jcsd
  3. Jan 27, 2013 #2

    Simon Bridge

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    Science Advisor
    Homework Helper

    What did you try?
    Did you remember to convert the volume to m^3 (or density into kg/cm^3)?
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