A lecture bottle of sulfur dioxide bursts in a laboratory that is at normal temperature and atmospheric pressure. The internal volume of the lecture bottle is 0.44 L and it is at a pressure of 200 psi. What volume would the released SO₂ occupy at normal temperature and pressure? The laboratory is 27 feet long, 15 feet wide, and 10 feet high. Assuming there is no ventilation in the lab and the SO₂ is completely mixed, what would be the concentration of SO₂ in the lab in units of ppm at normal temperature and pressure?