![subject](/tpl/images/cats/himiya.png)
Modern smoke detectors utilize a small sample of americium-241 as a source of ionizing radiation. 241Am has a half-life of 432.2 years. The National Fire Protection Agency recommends replacing smoke detectors every 10 years. (a) How much 241Am remains after 10.0 years if a particular smoke detector contains 0.23 µg of 241Am at the time of construction?
![ansver](/tpl/images/cats/User.png)
Answers: 2
![](/tpl/images/ask_question.png)
![](/tpl/images/ask_question_mob.png)
Another question on Chemistry
![question](/tpl/images/cats/himiya.png)
Chemistry, 22.06.2019 04:00
Tin has ten stable isotopes. the heaviest, 124sn, makes up 5.80% of naturally occuring tin atoms. how many atoms of 124sn are present in 82.0 g of naturally occurring tin? what is the total mass of the 124sn atoms in this sample?
Answers: 3
![question](/tpl/images/cats/himiya.png)
Chemistry, 22.06.2019 10:00
Suppose the universe were completely empty except for one object-a solid sphere moving through space of 100 km/s. what sort of path would the object be moving in? explain your answer
Answers: 1
![question](/tpl/images/cats/himiya.png)
Chemistry, 22.06.2019 10:30
Apiece of metal with a length of 1.42 cm was measured using four different instruments. which of the following measurements is the most accurate?
Answers: 3
![question](/tpl/images/cats/himiya.png)
Chemistry, 22.06.2019 14:00
How does the presence of oxygen affect the chemical pathways used to extract energy from glucose?
Answers: 3
You know the right answer?
Modern smoke detectors utilize a small sample of americium-241 as a source of ionizing radiation. 24...
Questions
![question](/tpl/images/cats/mat.png)
Mathematics, 16.02.2021 21:00
![question](/tpl/images/cats/fizika.png)
Physics, 16.02.2021 21:00
![question](/tpl/images/cats/biologiya.png)
![question](/tpl/images/cats/mat.png)
Mathematics, 16.02.2021 21:00
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/mat.png)
Mathematics, 16.02.2021 21:00
![question](/tpl/images/cats/en.png)
![question](/tpl/images/cats/biologiya.png)
Biology, 16.02.2021 21:00
![question](/tpl/images/cats/ekonomika.png)
![question](/tpl/images/cats/biologiya.png)
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/mat.png)
Mathematics, 16.02.2021 21:00
![question](/tpl/images/cats/mat.png)
Mathematics, 16.02.2021 21:00
![question](/tpl/images/cats/mat.png)
Mathematics, 16.02.2021 21:00
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/istoriya.png)
History, 16.02.2021 21:00
![question](/tpl/images/cats/health.png)
![question](/tpl/images/cats/istoriya.png)
![question](/tpl/images/cats/istoriya.png)
History, 16.02.2021 21:00
![question](/tpl/images/cats/obshestvoznanie.png)
Social Studies, 16.02.2021 21:00