Chemistry, 09.10.2020 01:01 GLASGOWANASTASIA
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−1 (becquerels per liter) under steadystate conditions. The room behaves as a CMFR, and the decay of radon is a first-order reaction with a decay rate constant of 2.09 × 10−6 s−1. 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−1, how long will it take to lower the radon concentration to an acceptable level of 0.15 Bq · L−1?
Answers: 3
Chemistry, 22.06.2019 06:00
How many atoms of mg are present in 97.22 grams of mg? 6.022 × 1023 2.408 × 1024 4.818 × 1024 5.855 × 1025
Answers: 2
Chemistry, 22.06.2019 12:00
In a laboratory, 1.55mg of an organic compound containing carbon, hydrogen, and oxygen is burned for analysis. this combustion resulted in the formation of 1.45mg of carbon dioxide and .89 mg of water. what is the empirical formula for this compound?
Answers: 1
Chemistry, 22.06.2019 16:40
Identify the lewis acid in this balanced equation: ag+ + 2nh3 -> ag(nh3)2+a. ag+b. nh3c. ag(nh3)2+
Answers: 1
Chemistry, 22.06.2019 17:30
Take a look at this dandelion. the yellow flower on the right is pollinated and the seeds on the left are transported by
Answers: 2
A 90-m3 basement in a residence is found to be contaminated with radon coming from the ground throug...
Social Studies, 08.01.2021 20:50
Mathematics, 08.01.2021 20:50
Mathematics, 08.01.2021 20:50
Mathematics, 08.01.2021 20:50
Spanish, 08.01.2021 20:50
Health, 08.01.2021 20:50
Social Studies, 08.01.2021 20:50
Biology, 08.01.2021 20:50
Mathematics, 08.01.2021 20:50
Mathematics, 08.01.2021 20:50
Mathematics, 08.01.2021 20:50