Determine the mole fractions and partial pressures of CO2, CH4, and He in a sample of gas that contains 1.20 moles of CO2, 1.49 moles of CH4, and 3.21 moles of He, and in which the total pressure is 5.78 atm.ΧCO2 = PCO2 = atmΧCH4 = PCH4 = atmΧHe = PHe = atm