14-58 PtD Exposure to high concentrations of gaseous ammonia can cause lung damage. The acceptable short-term ammonia exposure level set by the Occupational Safety and Health Administration (OSHA) is 35 ppm for 15 min. Consider a vessel filled with gaseous ammonia at 30 mol/L, and a 10-cm-diameter circular plastic plug with a thickness of 2 mm is used to contain the ammonia inside the vessel. The ventilation system is capable of keeping the room safe with fresh air, provided that the rate of ammonia being released is below 0.2 mg/s. If the diffusion coefficient of ammo- nia through the plug is 1.3 x 10-10 m/s, determine whether or not the plug can safely contain the ammonia inside the vessel. Answer must be in mg/sec