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Unformatted text preview: 308.95 K 3. The pressure of the N 2 gas was found using Daltons Law of Partial Pressure. The total pressure was equal to the barometric pressure. The water vapor pressure is a function of temperature and was obtained using the chart. Pressure of H 2 O at 35.8C = 44.2824mmHg P Total = PH 2 O + PN 2 755 mmHg = 44.284 mmHg + PN 2 Pressure N 2 = 710.716 mmHg = 0.935 atm With the values for pressure, volume, and temperature, the moles of N 2 can be found. PV = nRT (0.935atm)(0.2946l) = n (0.08206)(308.95K) n = 0.01086 moles of nitrogen gas (0.01086moles nitrogen gas (1 mole MNO 2 ) = 0.01086 moles MNO 2 (1mole mole N 2) Mass of MNO 2 = (mass of vial + crystals) mass of vial Mass of MNO 2 = 14.328g 13.219 g = 1.109 g Molar mass of MNO 2 = mass of salt = 1.109g = 102.118g/mole Moles of salt 0.01086 moles Mass of NO 2 = N 14.01 O - 16.00 x 2 = 32.00 46.00 g Mass of M = 102.118 46.00g =56g....
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