Determine the Solubility of N₂ in Water Exposed to Air

Multiple Choice

Determine the solubility of N₂ in water exposed to air at 25 °C if the atmospheric pressure is 1.2 bar. Assume that the mole fraction of nitrogen is 0.78 in air and the Henry's law constant for nitrogen in water at this temperature is 6.1 × 10^-4 mol L^-1 bar^-1.

A) 1.5 × 10^-4 mol L^-1
B) 6.5 × 10^-4 mol L^-1
C) 5.7 × 10^-4 mol L^-1
D) 1.8 × 10^-4 mol L^-1
E) 3.6 × 10^-4 mol L^-1