If a trucks bumper is to be electroplated with chromium which electrode must the bumper be what must be the composition of the other electrode? Please help, I will mark brainliest. Links will be reported

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?