Atomic mass of Oxygen atom is 16 amu. Molecular mass of O2 us 32 amu. Mass of O2 gas is 32 grams / mole. Mass of O2 gas is 1.428 grams/litre at STP. Views Â· View Upvotes.
At vaporâliquid equilibrium, a liquid with individual components in certain concentrations will have an equilibrium vapor in which the concentrations or partial pressures of the vapor components have certain values depending on all of the liquid component concentrations and the temperature.
In vapor-pressure terms, the boiling point of water is the temperature at which the vapor pressure of the liquid is equal to that of the gas phase. Lower the surrounding pressure and you lower the boiling point, but the liquid will still not evaporate if you have 100% relative humidity.