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Topic: calculating density of ideal NaCl crystal. My conv factor must be off  (Read 3008 times)

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Offline Zym

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OK, I'm trying to calculate the density of an ideal NaCl crystal for a lab report. I know I messed up some where. Can anyone point me in the right direction?

Heres what I have:

4NaCl   M  = 233.768 amu.  V= (283 pm x 2)^3 = 80089 pm3
     
      233.768amu / 80089 pm  X  1E10 pm/ 1 cm X 1g/6.022 E23 amu = 3.19066 E -14 g/cm^3

now I'm not a rocket scientist (physics isn't until next year  ;D ) but I know a cm^3 of salt weighs a LOT more than that.

Thanks in advance for any help you may be able to offer. I did a search on the boards here and couldn't seem to turn up anything.
« Last Edit: March 01, 2007, 10:44:50 AM by Zym »

Offline Borek

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Re: calculating density of ideal NaCl crystal. My conv factor must be off
« Reply #1 on: March 01, 2007, 10:57:09 AM »
Hint: units don't cancel.
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