One more reason I changed my major to Journalism!!!!
Joe
David Massey wrote:
>
> Message text written by toad
> >Brethren
> It is all well and good to mention a significant truism as Avgrado's
> Number, but, "What does this number represent?"
>
> Toad
> <
>
> Welcome to Chemistry 101. It is the number of molecules in a mole. What
> does that mean? Well , one mole of a substance weighs, in grams, the total
> of molecular weights. In other words one mole of helium gas weighs 4 grams
> (the molecular weight of helium is 4) and a mole of water weighs (16+1+1)
> 18 grams.
>
> Additionally, one mole of gas occupies 22.4 litres of space at STP
> (standard temperature and pressure which is defined at 20 deg C and one
> atmosphere). It is this effect that explains how dirigibles fly. If you
> fill an envelope with Helium the one mole of helium weighs less than the
> one mole of air (Nitrogen and oxygen) it displaces.
>
> What does this have to do with LBC's? Nothing but don't forget PV=nRT.
>
> Dave
--
"If you can't excel with talent, triumph with effort."
-- Dave Weinbaum in National Enquirer
|