Natural gas is a mixture of hydrocarbons, primarily methane (CH₄) and ethane (C₂H₆). A typical mixture might have X_methane = 0.915 and X_ = 0.085. What are the partial pressures of the two gases in a 15.00-L container of natural gas at 20 ⁰C and 1.44 atm? Assuming complete combustion of both gases in the natural gas sample, what is the total mass of water formed?