Linked Questions

5
votes
2answers
101 views

Why are excess nuclei required to produce an NMR signal?

In NMR, an excess population of nuclei is required to produce a signal. If saturation is achieved (same number of nuclei in the α and β states) no net signal can be produced. A signal is produced when ...
4
votes
2answers
283 views

What software was used to create these organic reaction scheme figures?

I am aware that software such as ChemDraw, ChemDoodle or MarvinSketch can be used to draw skeletal formulas and the like. But what can I use to draw (in a similarly professional way) reaction schemes, ...
3
votes
2answers
173 views

Conceptual tussle with kinetics of equilibrium and non-equilibrium processes

Prologue: Recently started with Chemical Kinetics at class. Came across a couple of points in Levine's Physical Chemistry (the book was recommended on Chem.SE; so I thought I'd give it a read :D) that ...
2
votes
2answers
259 views

How are there three possible tautomers of 2,2,4-trimethylheptane-3,5-dione? [closed]

The answer for the above question is three. But I am able to draw four structures: Where am I getting it wrong?
2
votes
2answers
3k views

Carbonyl bond vs alkene bond

Why is that carbonyl bonds are stronger than those of alkenes? It's a basic question but I've never really thought much about it. I've read several times that carbonyl bonds are shorter and you need ...
2
votes
2answers
424 views

A Chemdrawing software? [duplicate]

I would like to know about a Chemdrawing sotware for 2-d molecular structures. it should be mainly linux based (but if it supports other OS's then that would be great)
1
vote
2answers
2k views

Advanced Level Chemistry Book Recommendation [duplicate]

I have a test comming up on Chemistry in Advanced Level and I sincerly ask for a book recommendation for chemistry. I already got the book chemistry by Ramond Chang. And I am pretty near to the exam. ...
0
votes
2answers
82 views

How does current start to flow when galvanic cell is first connected?

Using the Daniell Cell as an example, where in the steady state we expect zinc to be oxidised and copper to be reduced spontaneously due to the overall reduction in Gibbs free energy, how does the ...
0
votes
2answers
645 views

Is there a free, super simple app or website for IUPAC names from structures?

I am looking for a free, very simple tool for IUPAC names of organic molecules. I teach high school chemistry, and it would be fantastic to have an app or web tool that students could use to draw ...
0
votes
2answers
94 views

Studying Chemistry [duplicate]

I know this is a silly statement to say, but I really want to excel in Chemistry. The thing is, I forgot numerous things from elementary Chemistry such as introduction to basic stoichiometry. Do you ...
-3
votes
2answers
4k views

can anyone suggest me good chemistry video lectures [duplicate]

Can anyone please suggest me some websites from where i can get free chemistry video lectures?it must be relevant to iit jee syllabus.
14
votes
1answer
7k views

Why isn't the orbital angular momentum also considered while calculating the magnetic moments 3d transition elements?

My textbook (Chapter: The d- and f- Block Elements) makes an interesting assertion, however, without any reason to back it up. Paramagnetism arises from the presence of unpaired electons, each such ...
12
votes
1answer
391 views

Books for a very advanced 3rd grader (elementary school) [duplicate]

My daughter is a 3rd grader, but she reads at 8th grade level, and she is 2 grade levels ahead in math. She reads everything she gets her hands on. She took some chemistry activities, and she loved ...
9
votes
1answer
599 views

Is it possible to calculate the momentum of an electron precisely?

In a national level, undergraduate examination (TIFR-2018) following question was asked: Which of the following is not correct with regard to the uncertainty principle? An electron in an atom cannot ...
8
votes
1answer
194 views

My Misconception of Entropy

It was recently brought to my attention that my understanding of entropy is wonky at best. In my experience, entropy was introduced (superficially at best) during general chemistry/foundations of ...

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