What will be the resultant steady-state quantity

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Reference no: EM133388000

Question 1.) Chlorine-36-tagged chloroform, CHCl3, whose specific activity is 100 μCi/mol, is to be used under such conditions that 100 mg/h may be lost by evaporation. The experiment is to be done in a laboratory of dimensions 15 ft × 10 ft × 8 ft. The laboratory is ventilated at a rate of 100 ft3/min.

Question 2.) About 1013 Bq (270 Ci) of biomedical 14C waste is generated per year in the United States. If this waste continues to be generated at the same rate:
(a) What will be the resultant steady-state quantity of 14C waste?

(b) How long will it take until 99% of the steady-state inventory is reached?

Question 3.) A 200-L tank contains krypton at a pressure of 1335 psi (9312 kPa) at 70°F (21.1°C). The gas is labeled with 85Kr to a specific activity of 2 Ci per gram Kr. The krypton is leaking out of the tank at a rate of 1 mL (at STP) per minute. The tank is in a storage room 3 m × 3 m × 2 m high, and the air in the room is exchanged four times per hour. What is the steady-state concentration in the room, in μCi/cm3 and Bq/m3?

Reference no: EM133388000

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