Question

Approximately 79% of the total atmospheric pressure is taken up by nitrogen. At the top of Mt. Everest, Patm = 250 mm Hg. The partial pressure of nitrogen there is __________.

a) 197.5 mm Hg
b) 200 mm Hg
c) 600 mm Hg
d) 52.5 mm Hg

Answer 1

The partial pressure of nitrogen at the top of Mt. Everest is 197.5 mm Hg, which is found by multiplying the total atmospheric pressure by 79% (the percentage of nitrogen in the air).

So, the correct answer is A.

Step-by-step explanation:

The partial pressure of nitrogen at the top of Mt. Everest can be calculated using the atmospheric pressure and the percentage of nitrogen in the atmosphere. Given that the atmospheric pressure at the top of Mt. Everest is 250 mm Hg, and nitrogen makes up approximately 79% of the atmospheric pressure, we can use the formula:

PN2 = Patm × (percentage of N2 in the atmosphere)

Which gives us:

PN2 = 250 mm Hg × 0.79 = 197.5 mm Hg

Therefore, the partial pressure of nitrogen at the top of Mt. Everest is 197.5 mm Hg.

So, the correct answer is A.