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December 18, 2014

December 18, 2014

Posted by **Nick** on Tuesday, January 1, 2008 at 7:25pm.

Do i need to just plug in examples? I'm not positive on how to go about solving this

- AP Chem -
**Nick**, Tuesday, January 1, 2008 at 7:26pmsorry, forgot to mention that its *cubic closest*

- AP Chem -
**DrBob222**, Tuesday, January 1, 2008 at 8:29pmBy the way, I made an error in the problem below. There are TWO atoms per unit cell for the body centered cubic structure; therefore, the mass of a single atom is TWICE 47.88*(1/6.022 x 10^23) etc. In cubic closest packing the volume occupied is about 74%.

- AP Chem -
**DrBob222**, Tuesday, January 1, 2008 at 9:03pmI should have said the mass of the UNIT CELL is twice. Of course, the mass of a single atom is what was calculated previously. But you want the mass of a unit cell, not the mass of a single atom of Ti.

- AP Chem -

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