What is the partial pressure of oxygen in the atmosphere at the top of Mt. Everest? Atmospheric pressure at the summit of Mt. Everest is 253 torr. The...

The sum of the
partial pressures of all of the atmospheric gasses is equal to the total air pressure at any
given elevation on Earth.  It is important to note that the percent composition of atmospheric
gasses is the same at all elevations on Earth, it is simply the air pressure of these gasses
that decreases as elevation increases.  So to find the percent composition of oxygen in the
:

(0.20946 atm O2/1 atm air)*100=20.946% O2 in the atmosphere

Since the total air pressure at the top of Mount Everest is 253 torr we can multiply
this by the percent of O2 in the atmosphere to get our answer:

253
torr*0.20946=52.99 torr is the partial pressure of oxygen at the top of Mount
Everest.

href="https://en.wikipedia.org/wiki/Partial_pressure">https://en.wikipedia.org/wiki/Partial_pressure