Lily is doing science experiment with a substance in a sealed jar. A first. The substances molecules are moving around each other what will happen to Lily’s substance if she transfers energy in to the substance and causes a phase changes

Aroom with dimensions 7.00m×8.00m×2.50m is to be filled with pure oxygen at 22.0∘c and 1.00 atm. the molar mass of oxygen is 32.0 g/mol. how many moles noxygen of oxygen are required to fill the room? what is the mass moxygen of this oxygen?