![subject](/tpl/images/cats/himiya.png)
Chemistry, 23.10.2020 03:01 saraaaaaaaa20
Natural samples of copper contain two isotopes. 63Cu has a mass of 62.930 amu and 65Cu has a mass of 64.928 amu. The percent abundance of 63Cu is 69.09% and 65Cu is 30.91%. Calculate the average atomic mass of copper
![ansver](/tpl/images/cats/User.png)
Answers: 1
Another question on Chemistry
![question](/tpl/images/cats/himiya.png)
Chemistry, 21.06.2019 18:30
How much energy moves onto the next level, in an energy pyramid
Answers: 1
![question](/tpl/images/cats/himiya.png)
![question](/tpl/images/cats/himiya.png)
Chemistry, 23.06.2019 07:20
Which of the following are acids or bases? 1. sodium hydrogen 2. barium hydroxide solution 3. carbonate solution
Answers: 1
![question](/tpl/images/cats/himiya.png)
Chemistry, 23.06.2019 08:20
At which temperature would a reaction with ah= -220 kj/mol and as=-0.05 kj/(mol-k) be spontaneous?
Answers: 2
You know the right answer?
Natural samples of copper contain two isotopes. 63Cu has a mass of 62.930 amu and 65Cu has a mass of...
Questions
![question](/tpl/images/cats/mat.png)
Mathematics, 05.12.2019 07:31
![question](/tpl/images/cats/istoriya.png)
History, 05.12.2019 07:31
![question](/tpl/images/cats/fizika.png)
![question](/tpl/images/cats/mat.png)
Mathematics, 05.12.2019 07:31
![question](/tpl/images/cats/istoriya.png)
History, 05.12.2019 07:31
![question](/tpl/images/cats/mat.png)
Mathematics, 05.12.2019 07:31
![question](/tpl/images/cats/himiya.png)
Chemistry, 05.12.2019 07:31
![question](/tpl/images/cats/mat.png)
Mathematics, 05.12.2019 07:31
![question](/tpl/images/cats/mkx.png)
![question](/tpl/images/cats/istoriya.png)
History, 05.12.2019 07:31
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/istoriya.png)
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/biologiya.png)
Biology, 05.12.2019 07:31
![question](/tpl/images/cats/mat.png)
Mathematics, 05.12.2019 07:31
![question](/tpl/images/cats/en.png)
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/mat.png)
Mathematics, 05.12.2019 07:31
![question](/tpl/images/cats/mat.png)