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Apparently, though unproven, at 00:46 on Monday 09 May 2011, Peter Humphrey |
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did opine thusly: |
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|
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> On Sunday 08 May 2011 23:02:16 Alan McKinnon wrote: |
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> > Apparently, though unproven, at 00:14 on Monday 09 May 2011, john did |
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> > opine |
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> > |
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> > thusly: |
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> > > Great widgets. Not sure what a Molar Mass Calculator does? Perhaps |
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> > > weighs your teeth?? |
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> > : |
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> > :-) |
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> > |
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> > "Molar" as in the adjective describing "mole" as in "quantity of matter" |
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> > as in "some gigantic number of identical atoms (or maybe it's |
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> > molecules)". It's a very useful measure of "some quantity of stuff". |
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> > |
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> > IIRC the gigantic number is Avogadro's number, on the order of 10^124. So |
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> > one mole of hydrogen would be the amount of hydrogen containing that |
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> > number of hydrogen atoms (or maybe it's molecules. Whatever.) |
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> |
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> Here's a quotation from http://en.wikipedia.org/wiki/Mole_%28unit%29: |
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> |
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> "The mole is defined as the amount of substance that contains as many |
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> elementary entities (e.g., atoms, molecules, ions, electrons) as there are |
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> atoms in 12 g of the isotope carbon-12 (12C).[1] Thus, by definition, one |
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> mole of pure 12C has a mass of exactly 12 g." (I don't know how those |
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> super- and subscript numbers will appear in e-mail.) |
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> |
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> You just knew you were setting yourself up, didn't you? :) |
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It's near midnight on a Sunday and I'm knackered after a weekend of being |
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father to 2 nine-year old girls - I hadn't even begun thinking it that far |
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through :-) |
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I just knew I was being uber-lazy and expected someone else to do the heavy |
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lifting of looking up the reference. |
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|
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You just knew I was I was being a lazy old fart, didn't you? |
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-- |
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alan dot mckinnon at gmail dot com |