« first day (2444 days earlier)      last day (2240 days later) » 

02:30
Hello. Anyone here?
02:51
Hi
@orthocresol You know anything about bonds? Very basics here.
I'm going to sleep soon (it's 3 am here), so might not be the best person to ask. But just post your question and if somebody pops in, they might answer.
So when magnesium is burned oxygen bonds with it ionically causing its mass to increases. Why does magnesium being burned spark this reaction? Also why doesnt magnesium bond with other things in the air?
ok thanks and good night
Oh, magnesium can react with nitrogen all right. en.wikipedia.org/wiki/Magnesium_nitride It's just very hard, because to do so, you need to (amongst other things) break the N–N triple bond. The double bond in oxygen is easier to break, so that reacts with magnesium first.
hmmm. And also doesnt this also mean that the actual mass of magnesium doesnt increase. Its just the oxygen (and others) bonded with it causing the increase. So in reality, magnesium and burned magnesium have the same exact mass.
02:57
so this is a bullshit lab....
ok thanks
lol
Also question about ionic bonds in general...
According to period table Oxygen has 2-6 valence electron configuration. Mg has 2-8-2. So when they bond Mg gives its last two to oxygen resulting Mg 2-8 and Oxygen 2-8. Correct?
Sounds right to me.
So what occurs when Mg (2-8-2) and S (2-8-6) bond
@TanYongBoon That's interesting. I was thinking along those lines just now. And I agree with your analysis about that bit. However, there are also other bits to consider, e.g. a H–C(O) bond is weaker than H–C(C), so at the end of the day, I still don't know the answer.
(sigma bond)
I think you have the correct thermodynamic product. I just don't know what's a good rationale for it, or if there is a good rationale at all.
 
1 hour later…
04:11
@GaurangTandon I just can't wait for may 19 to finally arrive
So tired of JEE
I haven't seen a movie since
When did infinity war come out
8 months
 
4 hours later…
07:57
Happy New Year to all periodicals from Mendeleyev's Motherland!
 
3 hours later…
11:16
@AvnishKabaj You are a one.
 
1 hour later…
12:30
All hail The Pun Lord
13:03
6
Q: Ipso substitution and its rules

Gaurang TandonI was taught that the following reaction happens: It is called the "ipso-substitution". My professor had told me that it occurs in the case of $\ce{-SO3H}$ and $\ce{-COOH}$. But he had ended the topic there. My textbook doesn't detail any more either. My searches landed me up at the fact that...

 
1 hour later…
14:08
0
Q: Request for License

Georgia PolychronakiGood day, I am MSc student in Department of Chemistry of the University of Patras and I would like to request your permission in order to include the picture "Biotage. Left image = microwave heating, right image = oil bath, both taken after 1 min of heating" in my Master's Thesis. Thank you, P...

14:20
@hBy2Py In case you are interested, I got access to the RR code that we talked about and finally was able reproduce it.
 
1 hour later…
15:32
@pH13 Do tell!
16:00
@AvnishKabaj i completely understand that sentiment, but do wait a little more :)
 
1 hour later…
17:08
> I've added the Chemdoodle assignment of stereochemistry and the full IUPAC names to confirm this.
Am I missing something?
There are only two names, which are not complete. The name of the third compound is missing entirely.
 
4 hours later…
21:03
@Loong Its name is
ah
It's so unlike you to be baffled by names.
I have to look it up.
It's according to 2020 recommendations.
Don't tell me you have a hardback for that one as well
oh
21:09
Oh, you do
I shall pretend to have that one, too.
OK, prosperous week. I am satisfied. Good night world and goodbye 2019's first week

« first day (2444 days earlier)      last day (2240 days later) »