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.
What is vapor pressure and why does it change with temperature? Vapor pressure is the pressure exerted by a liquid's vapor. As the temperature rises, the kinetic energy of molecules are moving more and more rapidly. Thus, the pressure of t â¦ he vapor phase increases.