> Ah, here we go: H2 is "0.08988 g/L". Apparently air itself is heavier than 
> that.
>
> (You would, of course, *expect* air to be heavier than the lightest gas in 
> the universe. But not thousands of times heavier...)

Only seems like a factor of 10 difference to me.  You do realise that 1g/L 
is 1kg/m^3...

> I can't find it now, but I'm pretty damned certain there's a quote on 
> Bash.org where somebody claimed this was true, and some poor sap spent 
> hours trying to figure out why their math implementation was wrong...

Yeh sounds familiar.

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