On Jul 30, 3:57 am, (Jerome Meekings)
wrote:
David G. Nagel wrote:

Jerome;

What Fred was talking about is that O2 at one atmosphere and 100%
concentration is toxic. This is why the maximum depth for scuba divers
using standard air mix is 300 feet. The partial pressure of atmospheric
oxygen is 14.7 pounds per square inch at that depth. This is the
equivalent of 100% concentration at sea level.

That was the one we were talking about, though I don't think Fred got
the point that it was one component not both.

No, we were talking about 'dihydrogen oxide', aka 'hydrogen
hydroxide',
aka H20, aka water. If you breathe water you die. If you are
exposed
to water in gaseous form at one bar partial pressure, you are scaled
to death.

From your two component comment it would appear you thought
we were talking about air.


And the usual limit for most scuba divers is 130 feet or 40 Meters, not
91 Meters 300 feet. For that it is usual to have a 3rd gas "He" in the
mix.

But that is getting too complex and loosing the point of the joke.


Well, yes. We were talking about water, not air.

--

FF