The Concentration of N₂ (G) Dissolved in Water That Is

The concentration of N₂ (g) dissolved in water that is saturated with air (80 mole % N₂) is 5.87×10 ^{- 4} molal. What is the Henry's law constant for this gas, in molal/atm?

A) 4.69×10 ^{- 4}
B) 5.87×10 ^{- 4}
C) 7.34×10 ^{- 4}
D) 1.31×10 ^{- 2}
E) none of these