The Solubility of Nitrogen Gas in Water at 25 °C

The solubility of nitrogen gas in water at 25 °C and a nitrogen pressure of 1.0 atm is 6.9 × 10^{- 4} M. The solubility of nitrogen in water at a nitrogen pressure of 0.80 atm is M.

A) 5.5 × 10^{- 4}
B) 1.2 × 10³
C) 8.6 × 10^{- 4}
D) 0.80
E) 3.7 × 10^{- 3}