Please help with both of these lol

How many miles of water are produced if 5.43 mol pbo2 are consumed

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?

Heat is the total potential energy of a substance that can be transferred. true false