The Concentration of Nitrogen in Water at 25 ^$\circ$ C Was Determined to Be 7

Multiple Choice

The concentration of nitrogen in water at 25 ^$\circ$ C was determined to be 7.2 * 10^-6 M. Calculate the partial pressure of nitrogen at the surface of the water in mmHg. The Henry's law constant for nitrogen gas at 25 ^$\circ$ C is 6.8 * 10^-4 mol/L·atm.

A) 2.0 mmHg
B) 4.0 mmHg
C) 6.0 mmHg
D) 8.0 mmHg
E) None of the above