![subject](/tpl/images/cats/himiya.png)
Chemistry, 26.10.2020 01:00 bionicboy03120440
A radioactive isotope has a half life of 55.0 seconds. After 275 seconds a sample of the isotope has a mass of 0.250 grams What was the initial mass of the sample?
![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 04:20
Which formula can be used to calculate the molar mass of ammonia (nh3)? molar mass of n + molar mass of h 3 × molar mass of n + molar mass of h molar mass of n + 3 × molar mass of h 3 × molar mass of n + 3 × molar mass of h
Answers: 1
![question](/tpl/images/cats/himiya.png)
![question](/tpl/images/cats/himiya.png)
Chemistry, 22.06.2019 14:30
What state of matter is ice a. liquid b. element c. solid d. gas
Answers: 1
![question](/tpl/images/cats/himiya.png)
Chemistry, 22.06.2019 16:40
The diagram below shows the movement of particles. what does this piece of evidence best support? the collision theory the maxwell-boltzmann distribution the effect of pressure on reaction rates the effect of temperature on reaction rates
Answers: 3
You know the right answer?
A radioactive isotope has a half life of 55.0 seconds. After 275 seconds a sample of the isotope has...
Questions
![question](/tpl/images/cats/health.png)
![question](/tpl/images/cats/mat.png)
Mathematics, 26.07.2021 23:30
![question](/tpl/images/cats/ekonomika.png)
![question](/tpl/images/cats/istoriya.png)
![question](/tpl/images/cats/mat.png)
Mathematics, 26.07.2021 23:30
![question](/tpl/images/cats/mat.png)
Mathematics, 26.07.2021 23:30
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/fizika.png)
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/mat.png)
Mathematics, 26.07.2021 23:30
![question](/tpl/images/cats/mat.png)
Mathematics, 26.07.2021 23:30
![question](/tpl/images/cats/mat.png)
Mathematics, 26.07.2021 23:30
![question](/tpl/images/cats/mat.png)
Mathematics, 26.07.2021 23:30
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/mat.png)
Mathematics, 26.07.2021 23:30
![question](/tpl/images/cats/mat.png)
Mathematics, 26.07.2021 23:30
![question](/tpl/images/cats/mat.png)
Mathematics, 26.07.2021 23:30
![question](/tpl/images/cats/mat.png)
Mathematics, 26.07.2021 23:30