1. The problem statement, all variables and given/known data Calculate the mass of nitrogen dissolved at room temperature in an 80.0L home aquarium. Assume a total pressure of 1.0 atm and a mole fraction for nitrogen of .78. 2. Relevant equations Mole fraction= moles solute/moles solution S_{gas}=K_{H} x P_{gas} K_{H} = 6.1 x 10^{-4} M/atm 3. The attempt at a solution S_{gas} = (6.1 x 10^{-4})(1 atm) S_{gas} = 6.1 x 10^{-4} 6.1 x 10^{-4}/ 1 L x 80.0 L = 4.88 x 10^{-2} moles (4.88 x 10^{-2} moles) x 28.02 g N_{s}/ 1 mol = 1.37 g N_{2} the correct answer is 1.1 g N_{2} Where did I go wrong and where does the mole fraction bit come into play? Thanks! 1. The problem statement, all variables and given/known data 2. Relevant equations 3. The attempt at a solution