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.
Best Answer: The boiling point of a liquid is the temperature at which the vapor pressure of the liquid equals the environmental pressure surrounding the liquid. A liquid in a vacuum environment has a lower boiling point than when the liquid is at atmospheric pressure.