[alt-photo] Re: Stoichiometry for the nonscientist

[Loris Medici]

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.