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06:47
4
Q: How to analyse 'Element not Found' exceptions when working with Selenium

Niels van ReijmersdalWhen you are writing Selenium/WebDriver automation scripts you will probably run into the exception NoSuchElementException. You think your selector is working, but somehow the element cannot be found. What strategy should I take to analyse different reasons that this might be the case? What sh...

chemistry with error messages
 
6 hours later…
13:00
Hallo everybody
@gannex 👋
@M.A.R. How're the ether fumes today?
@gannex Well I've been busy smelling ammonia and thioacetamide
@M.A.R. oh wow that's way worse than ether
@M.A.R. Did you know that it's likely that those strong stinks are mediated by an HSAB bindig relationship?
"In 1977, Robert Crabtree made the insightful proposal thatthiols“bind chemically to a nasal receptor, or group ofreceptors, containing a transition metal at the active site”andthat“copper(I), particularly when coordinated to a“soft”anionic centre such as I or SR, ... seems to be the most likelycandidate for a metallo-receptor site in olfaction” and now an olfactory receptor protein was discovered that has the predicted copper site: pubs.acs.org/doi/pdf/10.1021/jacs.6b06983
@gannex Now I do
13:17
@M.A.R. could explain how so many molecules of different shape, but containing the same functional group, could all have similar smells
No access (╯°□°)╯︵ ┻━┻
13:33
@Jan Re: What is the Lewis structure of the azide ion? I read your comment and you are right, so I opted to clean up the comments instead of posting there.
Also there you write 'However, if you have a formal negative charge that means an additional electron added to the 5 nitrogen usually has; [...]' which is correct, but the azide ion has an actual charge. I'm pretty sure that the OP of the question cannot (yet) distinguish the two, but it might be worthy to mention...
 
7 hours later…
20:28
2
Q: Use of Concentration for pH

Nate williamWhen we find the pH of a solution, do we use normality or molarity? My teacher said that if the compound is present by itself, we can use normality but in all other cases we should use molarity. Can you explain why?


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