![subject](/tpl/images/cats/himiya.png)
Chemistry, 21.04.2020 17:45 Jacobstoltzfus
The Environmental Protection Agency and health officials nationwide are concerned about the levels of radon gas in homes. The half-life of the radon-222 isotope is 3.8 days. If a sample of gas taken from a basement contains 2.1 µg of radon-222, how much radon will remain in the sample after 4.94 days? Answer in units of µg.
![ansver](/tpl/images/cats/User.png)
Answers: 3
![](/tpl/images/ask_question.png)
![](/tpl/images/ask_question_mob.png)
Another question on Chemistry
![question](/tpl/images/cats/himiya.png)
![question](/tpl/images/cats/himiya.png)
Chemistry, 22.06.2019 20:40
Select the correct value for the indicated bond angle in each of the compounds. o−o−oo−o−o angle of o3 90° 109.5° < 109.5° 120° < 120° 180° f−b−ff−b−f angle of bf3 180° < 109.5° < 120° 120° 109.5° 90° f−o−ff−o−f angle of of2 < 120° 120° 90° 109.5° 180° < 109.5° cl−be−clcl−be−cl angle of becl2 90° 109.5° 180° 120° < 109.5° < 120° f−p−ff−p−f angle of pf3 90° 109.5° < 109.5° 180° 120° < 120° h−c−hh−c−h angle of ch4 90° < 109.5° 180° 120° < 120° 109.5°
Answers: 1
![question](/tpl/images/cats/himiya.png)
Chemistry, 23.06.2019 02:30
Apound is approximately 0.45 kilogram. a persons weighs 87 kilograms. what is the persons’s weight, in pounds, when expressed to the correct number of significant figures
Answers: 1
![question](/tpl/images/cats/himiya.png)
Chemistry, 23.06.2019 05:30
What is the morality of 2.50 l of solution that contains 1.85 mol of anhydrous sodium tetraborate?
Answers: 1
You know the right answer?
The Environmental Protection Agency and health officials nationwide are concerned about the levels o...
Questions
![question](/tpl/images/cats/obshestvoznanie.png)
![question](/tpl/images/cats/mat.png)
Mathematics, 11.01.2021 20:20
![question](/tpl/images/cats/mat.png)
Mathematics, 11.01.2021 20:20
![question](/tpl/images/cats/mat.png)
Mathematics, 11.01.2021 20:20
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/mat.png)
Mathematics, 11.01.2021 20:20
![question](/tpl/images/cats/en.png)
English, 11.01.2021 20:20
![question](/tpl/images/cats/mat.png)
Mathematics, 11.01.2021 20:20
![question](/tpl/images/cats/mat.png)
Mathematics, 11.01.2021 20:20
![question](/tpl/images/cats/mat.png)
Mathematics, 11.01.2021 20:20
![question](/tpl/images/cats/informatica.png)
Computers and Technology, 11.01.2021 20:20
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/himiya.png)
![question](/tpl/images/cats/mat.png)
Mathematics, 11.01.2021 20:20
![question](/tpl/images/cats/mat.png)
Mathematics, 11.01.2021 20:20
![question](/tpl/images/cats/en.png)
English, 11.01.2021 20:20
![question](/tpl/images/cats/en.png)
English, 11.01.2021 20:20
![question](/tpl/images/cats/en.png)
English, 11.01.2021 20:20