What are the mole fraction and the partial pressure of each gas?

Find the partial pressures, total pressure, and mole fractions.?

• A gas cylinder of volume 5.00 L contains 1.28 g of Ar and 0.0640 g of Ne. The temperature is 298 K. Find the partial pressures, total pressure, and mole fractions. What is the partial pressure of Ar (in atm)? What is the partial pressure of Ne (in atm)? What is the total pressure (in atm)? What is the mole fraction Ar? This is unitless. What is the mole fraction Ne? This is unitless. no clue where to start..plz help..if you are good a chem and don't mind helping me with other questions besides this plz email me at [email protected]!!

• Answer:

  Moles Ar = 1.28 / 39.948 =0.0570 Moles Ne = 0.0640 / 20.1797 = 0.00317 total moles = 0.0602 Mole fraction Ar = 0.0570 / 0.0602 = 0.946 Mole fraction Ne = 1 - 0.946 =0.054 Pressure Ar = 0.0570 x 0.0821 x 298 / 5.00 pressure Ne = 0.00317 x 0.0821 x 298 / 5.00 total pressure = pressure Ar + pressure Ne