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Water in equilibrium with atmospheric nitrogen (pN2 = 0.80 atm) has a nitrogen concentration of 5.45x10-4...

Water in equilibrium with atmospheric nitrogen (pN2 = 0.80 atm) has a nitrogen concentration of 5.45x10-4 mol/L at 20 oC. Calculate Henry law’s constant KH (atm).

Can you please explain this in details as i donot know how to attempt this.

Thank you

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