A) calculate the weight change if a full tank of oxygen(m60 aluminum cylinder, 1699 liters capacity –discharge at sea level and 20 deg c) is completely emptied.(10 kg empty wt) assume ideal gas laws hold and the tank is emptied at 20 deg c sea level. b) if the initial fill pressure was 2000 psi, what was the tank volume in liters. under stpd(standard temperature-0 deg c, standard pressure-sea level, and dry) conditions 1 mole of gas occupies 22.4 liters of volume the molecular weight : oxygen-16, 2.2 lbs/kg. 760 mm hg=14.7 psi