[alt-photo] Re: Stoichiometry for the nonscientist

[David Ashcraft]

Thanks Katherine and Loris, I didn't get back until late last night  
from a day trip into the high country for a hike and swim in the  
lake :o) so a little late responding.  I appreciate your time  
explaining this and hope others are helped by your efforts also.
David

On Jul 29, 2010, at 10:45 PM, Loris Medici wrote:

> Thanks Katharine. A nice round off, as always...
>
> David, I may continue with the rest of examples if you wish. (Which  
> are
> better suited to make you understand the usage of molar notation and  
> why
> chemist prefer it instead of percentage. My first example was an  
> intoduction
> to the molar mass concept and a straightforward / simple example to  
> one of
> its uses.) See my first message to see the descriptions of the rest of
> examples - that I may present to you...
>
> Regards,
> Loris.
>
>
> -----Original Message-----
> From: alt-photo-process-list-bounces at lists.altphotolist.org On  
> Behalf Of
> Katharine Thayer
> Sent: Friday, July 30, 2010 8:29 AM
> To: The alternative photographic processes mailing list
> Subject: [alt-photo] Re: Stoichiometry for the nonscientist
>
> ...
>
> It's an amazing and remarkable fact of chemistry that no matter what  
> kind of
> chemical we have, a mole of that compound contains exactly the same  
> number
> of molecules as a mole of a different chemical compound.  (You don't  
> really
> need to know what that number is, though it's been mentioned a  
> couple of
> times in this thread, and was mentioned in the article you referred  
> to; it's
> Avogadro's number, 6.02 x 10^23;  the only thing you need to  
> understand is
> that a mole always contains the same number of molecules, no matter  
> what
> it's a mole of, and that's why we use moles to figure equivalencies of
> material in chemical equations.)
>
> ...
>
> Each to his own, is what I've always said on this list, for...  
> goodness,  a
> dozen years now.
>
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