[Healeys] hydrogen cars

[John Sims]

Man, I am sorry that I started this thread EXCEPT that for some inane reason
I have been trying to get my delete file up to 10,000 items so that I can
see how long it takes to delete them  all when I click on the "Empty Folder"
button. This thread is sure helping me to rapidly get up to the 10,000
deletes. Have only about 500 to go for the 10,000 so keep it going.

John Sims, BN6
Aberdeen, NJ
 
http://www.healey6.com


-----Original Message-----
From: healeys-bounces at autox.team.net [mailto:healeys-bounces at autox.team.net]
On Behalf Of Richard Ewald
Sent: Monday, March 21, 2011 10:59 PM
To: pennell at cox.net
Cc: healeys at autox.team.net; Frederich Ficke
Subject: Re: [Healeys] hydrogen cars

Mass not density
Wiki link http://en.wikipedia.org/wiki/Mole_%28unit%29
"By this definition, a mole of any pure substance has a mass in grams
exactly equal to that substance's
molecular<http://en.wikipedia.org/wiki/Molecular_mass>or atomic mass
<http://en.wikipedia.org/wiki/Atomic_mass>; e.g., 1mol of
calcium<http://en.wikipedia.org/wiki/Calcium>-40
has an approximative mass of 40g, because the Ca-40 isotope has a mass of
39.9625906 amu <http://en.wikipedia.org/wiki/Atomic_mass_unit> on the C-12
scale. In other words, the numerical value of a substance's molecular or
atomic mass in atomic mass
units<http://en.wikipedia.org/wiki/Atomic_mass_units>is the same as that of
its molar mass <http://en.wikipedia.org/wiki/Molar_mass>the mass of one
mole of that substancein grams <http://en.wikipedia.org/wiki/Grams>."
He said lighter, that refers to mass, not density.
So by weight He is about 4X as heavy as H, not 50X I stand by my statement.

On Mon, Mar 21, 2011 at 6:55 PM, <pennell at cox.net> wrote:

> Neither of yoiu are correct.  Hydrogen is roughly 2 times lighter than
> helium.  Comparisons of atomic masses to determine density does not
> hold water.  Also I fail to see why any comparison to helium is even being
made.
>
> Keith
>
> ---- Richard Ewald <richard.ewald at gmail.com> wrote:
> > Also BTW Hydrogen is not 50 times lighter than Helium.  Hydrogen has
> > an atomic weight of 1.0079.  Helium has an atomic weight of 4.0026.
> > If you want something that is 50 times heavier than Hydrogen it
> > would be
> Vanadium a
> > metal with an atomic weight of 50.942.
> > Rick
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