Question: last time posted expert got wrong answer please show all steps thanks PBDEs (polybrominated diphenyl ethers) are a class of compounds than have been used

last time posted expert got wrong answer

please show all steps thanks

PBDEs (polybrominated diphenyl ethers) are a class of compounds than have been used as flame retardants in furniture. There has been concern that their gradual release into indoor air presents a health hazard. A 200m3 house has a ventilation rate of 2 turnovers per hour. PBDE-209 is emitted from furniture at a rate of .055mg/d. The concentration of PBDE-209 in outdoor air is 0.08ng/m3. What is the concentration of PBDE-209 in the air in the house in ng/m3

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