The Solubility of Oxygen in Lakes High in the Rocky $\circ$

Multiple Choice

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

A) 3.66 * 10^-5 M
B) 1.75 * 10^-4 M
C) 2.67 * 10^-4 M
D) 4.06 * 10^-4 M
E) None of the above.