![subject](/tpl/images/cats/himiya.png)
Chemistry, 11.10.2021 07:10 xandraeden32
QUICK QUESTION: why is there 2 hydrogen in the periodic table? I noticed that there’s one hydrogen in group 1 and another in group 17.
![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 07:30
Calculate the ratio of h+ ions to oh– ions at a ph = 7. find the concentration of h+ ions to oh– ions listed in table b of your student guide. then divide the h+ concentration by the oh– concentration. record this calculated ratio in table a of your student guide. compare your approximated and calculated ratios of h+ ions to oh– ions at a ph = 7. are they the same? why or why not? record your comparison in table a. what is the concentration of h+ ions at a ph = 7? mol/l what is the concentration of oh– ions at a ph = 7? mol/l what is the ratio of h+ ions to oh– ions at a ph = 7? : 1
Answers: 1
![question](/tpl/images/cats/himiya.png)
Chemistry, 22.06.2019 11:00
The human eye contains a molecule called 11-cis-retinal that changes shape when struck with light of sufficient energy. the change in shape triggers a series of events that results in an electrical signal being sent to the brain that results in vision. the minimum energy required to change the conformation of 11-cis-retinal within the eye is about 164 kj/mol.
Answers: 2
![question](/tpl/images/cats/himiya.png)
Chemistry, 22.06.2019 12:30
The bond energy for the van der waals bond between two helium atoms is 7.9×10−4ev. assuming that the average kinetic energy of a helium atom is (3/2)kbt, at what temperature is the average kinetic energy equal to the bond energy between two helium atoms
Answers: 1
![question](/tpl/images/cats/himiya.png)
Chemistry, 22.06.2019 22:30
How do limiting factors most affect population size? ostop population growthrestrict population growthincrease population sizeresult in positive impactso
Answers: 1
You know the right answer?
QUICK QUESTION: why is there 2 hydrogen in the periodic table? I noticed that there’s one hydrogen i...
Questions
![question](/tpl/images/cats/istoriya.png)
![question](/tpl/images/cats/fizika.png)
Physics, 12.12.2019 07:31
![question](/tpl/images/cats/biologiya.png)
Biology, 12.12.2019 07:31
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/geografiya.png)
Geography, 12.12.2019 07:31
![question](/tpl/images/cats/mat.png)
Mathematics, 12.12.2019 07:31
![question](/tpl/images/cats/istoriya.png)
History, 12.12.2019 07:31
![question](/tpl/images/cats/fizika.png)
Physics, 12.12.2019 07:31
![question](/tpl/images/cats/es.png)
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/health.png)
![question](/tpl/images/cats/mat.png)
Mathematics, 12.12.2019 07:31
![question](/tpl/images/cats/biologiya.png)
![question](/tpl/images/cats/health.png)
Health, 12.12.2019 07:31
![question](/tpl/images/cats/biologiya.png)
![question](/tpl/images/cats/mat.png)
Mathematics, 12.12.2019 07:31
![question](/tpl/images/cats/istoriya.png)
History, 12.12.2019 07:31
![question](/tpl/images/cats/health.png)
Health, 12.12.2019 07:31
![question](/tpl/images/cats/en.png)