For a X to (100 – X) mixture of propellant 1 to propellant 2:
number of moles for propellant 1 =
= X / (molecular weight of propellant 1)
number of moles for propellant 2 =
= (100 – X) / (molecular weight of propellant 2)
partial pressure for propellant 1 at room temperature in psi =
= (moles of propellant 1) / ((moles of propellant 1) + (moles of propellant 2)) * (vapor pressure for propellant 1 at room temperature in psig)
partial pressure for propellant 2 at room temperature in psi =
= (moles of propellant 2) / ((moles of propellant 1) + (moles of propellant 2)) * (vapor pressure for propellant 2 at room temperature in psig)
total pressure at room temperature in psi =
= (partial pressure for propellant 1) + (partial pressure for propellant 2)
