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1. Find volume of spheres = 4/3pr3 and multiply by 4 since there are 4 spheres.

2. Find volume of units cell = l 3 = (2Ö2r)3.

3. Find volume of empty space = vol unit cell minus volume of spheres.

4. Divide volume empty space by volume of unit cell.

It works out to 25.952

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โˆ™ 2011-02-02 19:29:22
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