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At 14:49 7/20/99 +0800, you wrote:
greetings. i just joined your e-group recently and have found most
discussions to be very informative. i have read the discussion on the
saturation of air. a related point :

dry air is actually denser than moist air, contrary to what majority of
our clients thought. in one particular session, i encountered a teacher
who was quite hard to convince. kindly provide me with a thorough
explanation.

thanks.

alvin c. flores

Consideration of the average weight of oxygen and nitrogen molecules
versus that of water will provide the answer.
Review the plurality of the oxygen molecule versus the singularity of
the oxygen component of water.

Oxygen density 1.43 kg/m^3
Nitrogen density 1.25 kg/m^3
Hydrogen 0.09 kg/m^3
Water vapor (273K) 0.80 kg/m^3
Air 1.29 kg/m^3

brian whatcott <inet@intellisys.net>
Altus OK