Posted by sara on Monday, November 10, 2008 at 9:56pm.
Using your answer from Part A, calculate the volume of a mole of Na atoms (in cm3/mol ). Assume that the entire volume is occupied by Na atoms leaving no gaps or holes between adjacent atoms.
(Answer A is V= 2.70*10^7)
- chemistry - DrBob222, Monday, November 10, 2008 at 10:00pm
units of the 2.70 x 10^7?
Is that for a mole of Na atoms or something different.
- chemistry - sara, Monday, November 10, 2008 at 10:11pm
- chemistry - DrBob222, Monday, November 10, 2008 at 10:24pm
If the volume of one Na atom is 2.70 x 10^7 pm (I guess that's pm^3), I would change that to cc and multiply by 6.02 x 10^23 for a mole of them. I think 1 pm^3= 10^-30 cc but check me out on that.
- chemistry - sara, Monday, November 10, 2008 at 10:34pm
yes 1pm^3= 10^-30
thank you very much i got the answer :)
- chemistry - sara, Monday, November 10, 2008 at 10:40pm
just wondering why the value calculated in Part B is significantly smaller than the literary values?
- chemistry - sara, Monday, November 10, 2008 at 10:47pm
because the value for the molar volume of Na is about 23 cm^3/mol and the value i got is 16.3 cm^3/mol.
- chemistry - sara, Monday, November 10, 2008 at 10:57pm
yeah i was wondering is it because The molar volume calculated does not take into account that the electron clouds of neighboring sodium atoms repel each other.
The metallic radius used in the calculation was based on a small overlap between the electron orbitals of neighboring atoms.
The metallic radius for sodium does not take into account that sodium commonly loses one electron and exists as .
- chemistry - sara, Monday, November 10, 2008 at 10:59pm
or it The molar volume calculated does not take into account that the shape of the sodium atoms affects packing space between atoms.
The metallic radius reported is not very accurate since electron clouds are mostly empty space and have no specific volume.
- chemistry - sara, Monday, November 10, 2008 at 11:03pm
thanks i got it
- chemistry - john, Saturday, April 18, 2009 at 1:41pm
ah this must be a mastering chemistry problem
- chemistry - MasteringChemistry, Saturday, October 10, 2009 at 4:32pm
that volume is slightly larger than an iPod Shuffle
- chemistry - lkjhfads, Monday, January 21, 2013 at 7:15pm
I like trains.
- chemistry - jesus, Sunday, April 6, 2014 at 9:54pm
Just stopping by to say you all are going to Hell
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