ERHS 350 CSU Personal Breathing Zone & Industrial Hygienist Discussion

Description

Please provide a complete answer of the following questions to receive a full credit: 1.An IH conducted personal breathing zone sampling for chlorobenzene (MW = 113) with a sampling rate of 150 ml/minute for 7.5 hours. The actual concentration in the air was 250 ppb. What is the expected chlorobenzene mass collected on the sample media? (10 points)A.0.08 μgB.1.16 μgC.27 μgD.78 μg2.An industrial hygienist sampled an employee for ethylene oxide exposure (MW = 44). She operated her pump at 0.20 l/min for 7.0 hours. The lab measured 80 μg of ethylene oxide on the sampling tube. What was the employee’s estimated exposure? (10 points)A.0.53 ppbB.84 ppbC.95.2 ppbD.530 ppb3.A weather balloon contains 3 m3 of helium (MW = 4 g/mol) at 25 C and 760 mm Hg. What is the volume of the helium when it reaches an altitude of 60,000 ft where the atmospheric pressure is 54 mm Hg and the temperature is -57 C? (10 points)

Tags:
Industrial Hygienist

personal breathing zone

Personal Breathing Zone

sampling tube

oxide exposure

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