4. The glove boxes in Dr. Kraft's research lab provide a nitrogen rich (oxygen free) environment needed by many inorganic compounds. To keep the boxes full of nitrogen, SJFU contracts Jackson Welding to supply cylinders containing 235 cubic feet of nitrogen. Each cylinder has 150,000.mmHg of pressure at 23C when delivered. Upon transfer of the tank to the glove box, students taking inorganic chemistry realized that the valve on the cylinder had been left open for the past 4.5 hours (time since transfer) and the pressure had dropped to 97563mmHg. a. What volume of nitrogen was lost in the 4.5 hours the valve was open? Assume the lab temperature stayed the same all day. b. How much money was wasted by the open valve if the cylinder cost SJFU $243.00 ? Assume the lab temperature stayed the same all afternoon