Elementary Principles 125 - 5.29 (cont'd) n air = n CCl 2 O...

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5- 13 5.29 (cont’d) n PV RT atm ft 296.2K L ft mol K La tm mol air air 3 3 == = 12 2 0 0 2 8 3 1 7 08206 2563 . . n n ppm CCl O air 2 × = 00446 2563 17 4 10 17 4 6 . .. The level of phosgene in the room exceeded the safe level by a factor of more than 100. Even if the phosgene were below the safe level, there would be an unsafe level near the floor since phosgene is denser than air, and the concentration would be much higher in the vicinity of the leak. d. Pete’s biggest mistake was working with a highly toxic substance with no supervision or guidance from an experienced safety officer. He also should have been working under a hood and should have worn a gas mask. 5.30 CH O CO H O 22 42 +→ + CH O CO HO 2 62 7 2 23
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