![subject](/tpl/images/cats/himiya.png)
Chemistry, 10.07.2019 06:30 andreanb8083
Asample taken from a layer of mica in a canyon has 2.10 grams of potassium-40. a test reveals it to be 2.6 billion years old. how much potassium-40 was in the sample originally if the half-life of potassium-40 is 1.3 billion years? a. 4.20 g b. 8.40 g c. 12.6 g d. 16.8 g e. 25.2 g
![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 01:30
(apex) when a cup of water is dropped, as the cup falls, the water in the cup falls out true or false?
Answers: 1
![question](/tpl/images/cats/himiya.png)
Chemistry, 22.06.2019 07:00
How many moles are in 7.2 x 10^23 carbon molecules? (*round to the nearest hundredth and include the unit "mol c" after your number) question 6 options:
Answers: 2
![question](/tpl/images/cats/himiya.png)
Chemistry, 22.06.2019 15:30
The reactions of photosynthesis occur in the of plant cell? a.mitochondria. b. lysosomes. c. chloroplasts. d. chlorophyll
Answers: 1
![question](/tpl/images/cats/himiya.png)
Chemistry, 22.06.2019 22:30
Akno3 solution containing 51 g of kno3 per 100.0 g of water is cooled from 40 ∘c to 0 ∘c. what will happen during cooling?
Answers: 3
You know the right answer?
Asample taken from a layer of mica in a canyon has 2.10 grams of potassium-40. a test reveals it to...
Questions
![question](/tpl/images/cats/mat.png)
Mathematics, 19.01.2020 17:31
![question](/tpl/images/cats/fizika.png)
Physics, 19.01.2020 17:31
![question](/tpl/images/cats/obshestvoznanie.png)
Social Studies, 19.01.2020 17:31
![question](/tpl/images/cats/es.png)
Spanish, 19.01.2020 17:31
![question](/tpl/images/cats/mat.png)
Mathematics, 19.01.2020 17:31
![question](/tpl/images/cats/mat.png)
Mathematics, 19.01.2020 17:31
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/fizika.png)
Physics, 19.01.2020 17:31
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/obshestvoznanie.png)
Social Studies, 19.01.2020 17:31
![question](/tpl/images/cats/mat.png)
Mathematics, 19.01.2020 17:31
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/istoriya.png)
History, 19.01.2020 17:31
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/himiya.png)
![question](/tpl/images/cats/biologiya.png)