Chemistry, 06.04.2021 01:10 AgentPangolin
A 90-m3 basement in a residence is found to be contaminated with radon coming from the ground through the floor drains. The concentration of radon in the room is 1.5 Bq/L under steady-state conditions. The room behaves as a CSTR and the decay of radon is a first-order reaction with a decay rate constant of 2.09 3 1026 s21 . If the source of radon is closed off and the room is vented with radon-free air at a rate of 0.14 m3 /s, how long will it take to lower the radon concentration to an acceptable level of 0.15 Bq/L
Answers: 3
= Radon concentration under steady state = 1.5 Bq/L
= Venting rate = 
= Final concentration of radon = 0.15 Bq/L
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