2. you are on a spaceship and are running out of oxygen. there is a supply of water and you have a strong
electrical supply. you need 120 liters of oxygen (at stp) to last until you reach earth. you can't use all of
the water or you will die. you check the water gauge and you see that you have 500 kg of water left. can
you make it home? how much water will you have to electrolyze in order to produce enough oxygen?
how much water will you have left for drinking?