The Solubility of Oxygen in Lakes High in the Rocky

Multiple Choice

The solubility of oxygen in lakes high in the Rocky Mountains is affected by the altitude. If the aqueous solubility of atmospheric O₂ is 2.67 × 10^-4 M at sea level and 25°C, what is the solubility of O₂ at an elevation of 12,000 ft where the total pressure is 0.657 atm? Assume the temperature is 25°C, and that the mole fraction of O₂ in air is 0.209 at both 12,000 ft and at sea level.

A) 1.75 × 10^-4 M
B) 2.67 × 10^-4 M
C) 3.66 × 10^-5 M
D) 4.06 × 10^-4 M
E) 5.58 × 10^-5 M