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03:21
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Q: Disgusting attitude of a homework vampire

santiagoI am referring to this comment, which states: And @santiago I know that it is on me to think about it but what to do when I'm not even able to understand where to start ? KlausWarzecha gave me the answer. So even if you close the question i dont care as i know the answer now. Which basicall...

discussion
 
2 hours later…
On the way to success
On the way to success
05:15
Hey, anyone out here?
??
???
????
 
2 hours later…
Anonymous
07:06
Hello...any one there? I have an organic chemistry doubt regarding [email protected] @Jan @santiago ....I thought of asking here before posting..
On the way to success
On the way to success
Cuz I am stil a beginner
Martin - マーチン
Martin - マーチン
07:19
hi @Onthewaytosuccess!
On the way to success
On the way to success
hi@Martin - マーチ
Martin - マーチン
Martin - マーチン
@Onthewaytosuccess Are you typing the names when you want to ping?
On the way to success
On the way to success
why my internet connection is low, any suggestions @Martin - マーチ
@Martin - マーチ: nope, I copy paste
Martin - マーチン
Martin - マーチン
okay, there is an easier way to do that ;)
you can type @ and start the name and then you can hit the tab key and it completes it for you
On the way to success
On the way to success
what is that
Martin - マーチン
Martin - マーチン
07:23
alternatively, three letters are enough to ping
@Onthewaytosuccess the tab key?
Tab key
Tab ↹ Tab key (abbreviation of tabulator key or tabular key) on a keyboard is used to advance the cursor to the next tab stop. == History == The word tab derives from the word tabulate, which means "to arrange data in a tabular, or table, form." When a person wanted to type a table (of numbers or text) on a typewriter, there was a lot of time-consuming and repetitive use of the space bar and backspace key. To simplify this, a horizontal bar was placed in the mechanism with a moveable lever stop for every position across the page, called a tab stop. Initially these were set by hand, but later tab...
On the way to success
On the way to success
Oh I see
I used a too long path
Martin - マーチン
Martin - マーチン
No worries, now you know and can type faster ;)
Anonymous
@Martin-マーチン see I was trying to understand why m-CBPA doesn't work well with alkynes ! With alkenes I know it works via the butterfly mechanism...
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On the way to success
@Mart
yup
Anonymous
oh oh..i see...
On the way to success
On the way to success
07:30
@Mart: Hey
Martin - マーチン
Martin - マーチン
well the supposed product
Hang on I found a link for that
Anonymous
sure :)
On the way to success
On the way to success
how to remember those groups that go towrds meta and para positions ,I find it difficult
Martin - マーチン
Martin - マーチン
It's halfway down the page: masterorganicchemistry.com/2013/06/04/…
But you are welcome to ask another question if that does not clear your doubt
@Onthewaytosuccess Do you mean in aromatic substitution?
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On the way to success
Ya of course
I need that thing
@Mart: Hey are you there
Anonymous
07:38
Thanks a lot @Martin-マーチン ...btw does m-CPBA react with aromatic system like benzene?
On the way to success
On the way to success
@Mart: Hey
Martin - マーチン
Martin - マーチン
@SanchayanDutta I would not expect it to, but I am not quite sure about it
@Onthewaytosuccess I hear you
Try to rationalise +I and -I effects and +M and -M effects
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On the way to success
Okay
Martin - マーチン
Martin - マーチン
en.wikipedia.org/wiki/Inductive_effect and en.wikipedia.org/wiki/Mesomeric_effect
they are pretty short
but they should give you an idea
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On the way to success
Another quiz
How to remember the variation of acidity and basicities
And how can I predict them easily
I mean in aromatic compounds
PH13
PH13
07:42
what do you mean?
Martin - マーチン
Martin - マーチン
You can also search the database: chemistry.stackexchange.com/search?q=inductive+effect
there are a couple of question linked
and helpful understanding the concept
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On the way to success
If I grab them correctly
Martin - マーチン
Martin - マーチン
if something raises doubt, just ask anew question linking to the original
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On the way to success
Okay.
Martin - マーチン
Martin - マーチン
Often the acidities can be explained by the same concepts
o/ @PH13
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On the way to success
07:44
And how to remember those salt analysis in s p d vlock elements
Martin - マーチン
Martin - マーチン
What do you mean with salt analysis?
Anonymous
@Martin-マーチン do you know any site which provides the mechanism of catalytic hydrogenation using Ni ? I mean I've always faced trouble with the stereochemistry
Martin - マーチン
Martin - マーチン
Not from the top of my head
maybe ucdavies or kahn academy has some sections on that
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On the way to success
@Mart: I meant those colours of compounds
Specially compounds involves s, p
elements
Martin - マーチン
Martin - マーチン
wikipedia has a section on hydrogenation, quite extensive, should cover most mechanisms en.wikipedia.org/wiki/Hydrogenation
On the way to success
On the way to success
07:47
How to remember those
Martin - マーチン
Martin - マーチン
@Onthewaytosuccess You mean flame colouring?
Or the colour of the salts?
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On the way to success
Ya stuff like that
Colours of oxides
And acidity , bascity of oxides
Martin - マーチン
Martin - マーチン
You will have to learn them
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On the way to success
And acidity , bascity of hydrides
I did learn them
Martin - マーチン
Martin - マーチン
i know of no easy way to remember them
On the way to success
On the way to success
07:49
But hw to remember those
Martin - マーチン
Martin - マーチン
learn by heart, i think that's the only way
On the way to success
On the way to success
okay
Martin - マーチン
Martin - マーチン
It's tough I know
for the acidity/ basicity of oxides, you just have to formulate an equation with water
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On the way to success
then
Martin - マーチン
Martin - マーチン
Then you can see if they rather produce OH- or H+
On the way to success
On the way to success
07:51
Ok
Martin - マーチン
Martin - マーチン
for example CaO + H2O -> Ca(OH)2
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On the way to success
Yes go ahead
Martin - マーチン
Martin - マーチン
and that reacts like Ca(OH)2 <=> Ca^2+ + 2OH-
it's reacting basic
Anonymous
@Martin-マーチン I went through the pages...So it seems that Ni/Pt/Pd all show syn addition...right?But what if Ni is used to reduce from alkyne (say but-2-yne) to but-2-ene....Will the cis or trans product predominate?
On the way to success
On the way to success
how to generalize those
Martin - マーチン
Martin - マーチン
07:53
Or SO3 + H2O -> H2SO4
most of the times oxides of electropositive element react basic
and non metals react acidic
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On the way to success
ya
Martin - マーチン
Martin - マーチン
have a look here: wou.edu/las/physci/ch412/oxides.html
I have not read it, but it seems promising
@SanchayanDutta I think that often needs to be determined on a case by case basis
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On the way to success
Okay I'll read it
Martin - マーチン
Martin - マーチン
@SanchayanDutta It also might depend heavily on the cat that was used
Anonymous
@Martin-マーチン one or two cases will do....for example reduction of but-2-yne by Ni..?
PH13
PH13
07:57
how did you post those "big" links to articles on chemistry.SE?
santiago
santiago
hi
Anonymous
@santiago hi :-)
Martin - マーチン
Martin - マーチン
@PH13 only the link to the page
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On the way to success
@Martin-マーチン: And one more thing, I find it difficult to understand phase diagram of water.For me it is a mess
Martin - マーチン
Martin - マーチン
o/ santiago
@Onthewaytosuccess It really is
water has a very complicated phase diagram
santiago
santiago
07:58
thinking of a question... if anything, so my mystery downvoting fan won't feel alone
Martin - マーチン
Martin - マーチン
even I do not understand it completely
PH13
PH13
water has several funny ice phases
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On the way to success
user image
How to analyse this
santiago
santiago
how could carbonic acid be stabilised
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On the way to success
??
PH13
PH13
08:04
There is this question about the bromodinitrobenzene chemistry.stackexchange.com/questions/33338/… and I have done geometry optimization over night to find out if there is a distance in bond length or not. Is it just worth a comment or should I somehow create an answer despite having no profound idea why those lengths aren't different? What would you do?
santiago
santiago
just thinking out loud
Martin - マーチン
Martin - マーチン
@PH13 Ron answer why the bonds have to be different, so you got an answer there
santiago
santiago
hmmm @Martin-マーチン I am reading an article that states that carbonic acid only exists for a fraction of a second in water.... I wonder if it could be 'stabilised'
Martin - マーチン
Martin - マーチン
for rationalising the difference, have a look at the orbitals
@santiago it can be
just not in water
it's pretty stable in the gas phase
santiago
santiago
hmmm worthwhile question?
Martin - マーチン
Martin - マーチン
08:07
try finding something on google scholar, if there is not enough material, go ahead
PH13
PH13
@Martin-マーチン I would have argued like him but almighty DFT says they are equal (1.480, 1.841, 1.842 \AA)
Martin - マーチン
Martin - マーチン
@PH13 You can also look at the computed charges
what dft?
b3lyp? bp86, pbe?
PH13
PH13
B3LYP-D3/def2-QZVPP gas phase
Martin - マーチン
Martin - マーチン
that's quite solid level
did you turn on symmetry?
well never mind that...
PH13
PH13
not more than C2
Martin - マーチン
Martin - マーチン
08:09
close enough to be considered equal
santiago
santiago
Hmmm but why does carbonic acid solvate (?) in water to hydrogen and bicarb ions after only 300nm?
Martin - マーチン
Martin - マーチン
well c2 should give you the same bond lengths for ortho
I would not have suspected a big effect on the bond lengths either
But post an answer with a pretty picture and put in the bond lengths
PH13
PH13
ok ^^
Martin - マーチン
Martin - マーチン
then we can improve the rest via the comments
it's a bit difficult to discuss when you have the data and i don't
all i can do is educated guessing ;)
@santiago There are a lot of equilibria that need to be considered when you put carbonic acid in water
and they are all part of the process
santiago
santiago
hmmm
hmmm not enough for a question i think
Martin - マーチン
Martin - マーチン
08:16
well it depends how you ask the question and what you actually want to know
santiago
santiago
well for one thing, in the article, it states that:
Our results support an average hydration number of 3.17 with the acid’s two protons each donating a strong hydrogen bond to solvating waters, the carbonyl oxygen accepting a strong hydrogen bond from solvating water, and the hydroxyl oxygen molecules accepting weak hydrogen bonds from the water,”
Martin - マーチン
Martin - マーチン
it's a fairly complex topic so there are points that might not be too easy
santiago
santiago
how is that hydraion number related to its rapid solvation
Anonymous
@Martin-マーチン can you help me with that Ni hydrogenation of alkyne thing!Just one example will do..say 2-hexyne or 2-butyne...will it produce cis or trans product?
Martin - マーチン
Martin - マーチン
i don't even know what an hydration number is
@SanchayanDutta I don't know O.o
santiago
santiago
08:19
@Martin-マーチン and there is the question....
how is the hydration number calculated and how is it related (if at all) to carbonic acid's rapid solvation in water?
Martin - マーチン
Martin - マーチン
@SanchayanDutta oh wait...
santiago
santiago
I am going to go for it... if downvoted too much, I can delete it
Anonymous
well sure
Martin - マーチン
Martin - マーチン
when you consider that hydrogen co-ordinates to the ni catalyst first on the surface, then only a cis product is possible
i found this one mhhe.com/physsci/chemistry/carey/student/olc/…
the more pressing question would be, will it stop at the alkene or go all the way to the alkane...
Anonymous
ya that's what I was expecting...Thanks for the article :-)
Martin - マーチン
Martin - マーチン
08:24
No problem
Anonymous
@Martin-マーチン I read that quinoline or something helps to stop the reaction at alkenes
santiago
santiago
OMG
Martin - マーチン
Martin - マーチン
@SanchayanDutta Maybe this article might help: researchgate.net/publication/…
Anonymous
Well bye for now...going for lunch...will give it a read soon :-)
Anonymous
Bbye !
Martin - マーチン
Martin - マーチン
08:28
bye bye
@santiago What up?
santiago
santiago
found 2 threads similar, but nothing about 'hydration numbers'
and in part, could be an answer to chemistry.stackexchange.com/questions/6587/…
@Martin-マーチン I might write an answer , as this article is very recent data
and make a separate question about hydration numbers
sound good, @Martin-マーチン?
i am not sure what to do...
okay @Martin-マーチン - it is done, I linked the 2 min previous smilar posts into the question chemistry.stackexchange.com/questions/33352/…
Martin - マーチン
Martin - マーチン
08:46
sorry.. i am a bit busy right now...
sound good i'll have a look later
santiago
santiago
sorry about that
no worries!
M.A.Ramezani
M.A.Ramezani
09:10
@Mithoron It's very very scientific.
Hey @san.
santiago
santiago
hi
M.A.Ramezani
M.A.Ramezani
Pinging you both is fun.
I am proud son.
The chat now goes on without me.
santiago
santiago
am happyish with my recent question and answer
M.A.Ramezani
M.A.Ramezani
@santiago Nice question.
santiago
santiago
not too shabby
just waiting for my downvoting fan to arrive
M.A.Ramezani
M.A.Ramezani
09:21
Let me ping him.
santiago
santiago
@M.A.Ramezani I got colourful here chemistry.stackexchange.com/questions/18524/…
M.A.Ramezani
M.A.Ramezani
@M.A.Ramezani Don't forget to downvote @santiago!
santiago
santiago
ha ha haaaa
M.A.Ramezani
M.A.Ramezani
@santiago Chemguide$\ldots$ I'll downvote anything that has chemguide in it.
santiago
santiago
has nice diagrams
oooh almost got a necromancer
M.A.Ramezani
M.A.Ramezani
09:25
How could one get necromancer again?
santiago
santiago
one can get many of them
M.A.Ramezani
M.A.Ramezani
Ahan. That's helpful.
santiago
santiago
absolutely
On the way to success
On the way to success
10:07
@M.A.Ramezani@santiago
M.A.Ramezani
M.A.Ramezani
Hullo @Ont!
On the way to success
On the way to success
hullo
so hw was the day
no topic to discuss right now @M.A.Ramezani
M.A.Ramezani
M.A.Ramezani
Bring on.
On the way to success
On the way to success
ya bring on one
M.A.Ramezani
M.A.Ramezani
I don't have anything in mind.
On the way to success
On the way to success
10:13
you are playing v.ball
M.A.Ramezani
M.A.Ramezani
Not now.
On the way to success
On the way to success
I mean are u a player
M.A.Ramezani
M.A.Ramezani
But today we have a match.
Iran vs. Poland.
On the way to success
On the way to success
so how it went
M.A.Ramezani
M.A.Ramezani
@Onthewaytosuccess Not a professional player, I was on the school's team.
On the way to success
On the way to success
10:14
lol.gee I thought you had a match
M.A.Ramezani
M.A.Ramezani
@Onthewaytosuccess It's on 16:30 UTC.
santiago
santiago
@M.A.Ramezani plays soccer with the power of his mind
On the way to success
On the way to success
What's the channel
M.A.Ramezani
M.A.Ramezani
A sports channel.
@santiago And his will.
On the way to success
On the way to success
@M.A.Ramezani
you watched
M.A.Ramezani
M.A.Ramezani
10:16
How in the hell should I know which channel broadcasts to Sri Lanka?
On the way to success
On the way to success
you watched
@M.A.Ramezani
PH13
PH13
do you know how to write the angstrom \AA ? it seems that I'm doing s.th. wrong :/
M.A.Ramezani
M.A.Ramezani
@PH13 Using LaTeX?
Hullo BTW.
santiago
santiago
I am seeing a news flash of an attack in France
On the way to success
On the way to success
that channel might be available here , dude
PH13
PH13
10:17
no, on chemistry.se
On the way to success
On the way to success
if ur nt using satalite
M.A.Ramezani
M.A.Ramezani
@santiago Ping @Hipp!
PH13
PH13
in LaTeX it would be \AA ^^
M.A.Ramezani
M.A.Ramezani
@PH13 That is with using $\LaTeX$
Did you enclose it in dollars?
$\AA$
O.0
PH13
PH13
yes ... it turns red but doesn't show the angstrom
M.A.Ramezani
M.A.Ramezani
10:19
MathJax doesn't support.
Hippalectryon
Hippalectryon
@M.A.Ramezani ?
M.A.Ramezani
M.A.Ramezani
I guess the package is AMSSymb.
Hippalectryon
Hippalectryon
@santiago Oh indeed. Pretty horrible. Someone got decapitated, others are injured
M.A.Ramezani
M.A.Ramezani
@Hippalectryon Look at the message I replied to.
santiago
santiago
@Hippalectryon hells bells
M.A.Ramezani
M.A.Ramezani
10:20
@Hippalectryon What kinda attack is it?
Hippalectryon
Hippalectryon
terrorist
M.A.Ramezani
M.A.Ramezani
Dang. They seem to like France.
@PH13 Oh, the package required for that is siunitx.
Hippalectryon
Hippalectryon
independent.co.uk/news/world/europe/…
santiago
santiago
After the Sydney attack, things are getting tense here
M.A.Ramezani
M.A.Ramezani
Use this instead: $\overset{\circ}A$
Oh wait, should include a mathrm there too.
PH13
PH13
10:22
@M.A.Ramezani that doesn't look like the real one :C
M.A.Ramezani
M.A.Ramezani
\overset{\circ}\mathrm{A} gives $\overset{\circ} \mathrm{A}$.
Why isn't it working? O.0
PH13
PH13
LaTeRRoR o.ô
M.A.Ramezani
M.A.Ramezani
$\mathrm{\overset{\circ}A}$
Hell yeah!
santiago
santiago
anyway - doing people like my colourful answer chemistry.stackexchange.com/questions/18524/…?
M.A.Ramezani
M.A.Ramezani
$\mathrm{\overset{\circ}A}$
There you go @Ph1. ^
PH13
PH13
10:25
@M.A.Ramezani thank you very much
M.A.Ramezani
M.A.Ramezani
@santiago I don't like your answer at all.
@PH13 Anytime.
santiago
santiago
@M.A.Ramezani hush you
M.A.Ramezani
M.A.Ramezani
No really, I don't. Because unicorns.
santiago
santiago
lol
the same unicorns that bit you?
M.A.Ramezani
M.A.Ramezani
Nah. The ones that ate my book.
O.0
How did I manage to type a and t before e?
I call myself a typomaster.
santiago
santiago
10:33
typomaster.... see, i do too
santiago
santiago
10:47
Funny story - I am always saing "All Hail santiago!" or similar ... yesterday, I caught in a hail storm - well played, nature, well played...
M.A.Ramezani
M.A.Ramezani
11:03
It was basically saying: Be careful what you wish for.
Hippalectryon
Hippalectryon
I wish for more wishes :(
M.A.Ramezani
M.A.Ramezani
@Hippalectryon BTW don't you find it suspicious?
Hippalectryon
Hippalectryon
?
M.A.Ramezani
M.A.Ramezani
Why are these terrorist attacks only happening in France?
Hippalectryon
Hippalectryon
Because they love us
M.A.Ramezani
M.A.Ramezani
11:09
I mean, you don't hear such things happening in Germany?
Hippalectryon
Hippalectryon
Also, because we've made it clear that we hate them -_-
M.A.Ramezani
M.A.Ramezani
Is it because @Jan ate them all?
Hippalectryon
Hippalectryon
We're actively involved in military operations
Germany isn't
We give tactical and (when we can) concrete air support in the ongoing operations
Most of the other countries just say they approve of that, but they don't give a concrete support
M.A.Ramezani
M.A.Ramezani
BTW, lest you haven't known, not many Muslims believe ISIS jerks to be Muslims.
Hippalectryon
Hippalectryon
Yeah. I was watching some humorist yesterday, who was dressed as a terrorist, and he said something like "What makes you think I'm a muslim ? Of course I've never read the Coran, look how many people I kill"
afk 20 mins, lunch
M.A.Ramezani
M.A.Ramezani
11:13
They wield a flag with Islamic mottos on them, but believe me, they are not Muslims.
@Hippalectryon Cya!
Hippalectryon
Hippalectryon
11:30
back
M.A.Ramezani
M.A.Ramezani
o/
M.A.Ramezani
M.A.Ramezani
11:59
3
Q: How to develop sense of humor/wit as non-native speaker?

OctoberAs in topic, I'm advanced in English, I'm looking for simple tricks how to smoothly extricate oneself from situations like awkward silence, when starting conversation with a stranger fails or being misunderstood etc. and I plan to use humor/wit. I'm already learning idioms and I use them daily, ...

phrase-usage slang humor
Heh. They should definitely come to The Periodic Table.
Hippalectryon
Hippalectryon
hehe
santiago
santiago
teehee
M.A.Ramezani
M.A.Ramezani
heetee
eeheet
eheete
13 hours ago, by jonsca
We'll start the self-actualization program next week
Next week, we're screwed.
7
Q: C-N bond lengths in 2-bromo-1,3,5-trinitrobenzene

Subhamon SupanthaAre all the $\ce{C-N}$ single bonds in 2-bromo-1,3,5-trinitrobenzene the same or different? I am of the view that the $\ce{C_1-N}$ and $\ce{C_3-N}$ bonds are of the same length and they are longer than the $\ce{C_5-N}$ bond, due to steric hindrance. Am I right or am I missing out something?

organic-chemistry bond
Whoa! Another Ronic answer.
diffracteD
diffracteD
12:34
hello guyz..
M.A.Ramezani
M.A.Ramezani
Hullo @Dif!
diffracteD
diffracteD
how's going there ...
M.A.Ramezani
M.A.Ramezani
Nothing much.
diffracteD
diffracteD
need a bit help to clear up some idea @M.A.Ramezani
M.A.Ramezani
M.A.Ramezani
OK. Throw it at me.
diffracteD
diffracteD
12:38
2
Q: Electronic density distribution in hydrogen bond

diffracteDI'm currently studying about the atomic configuration of electrostatic interactions. Concept is there that in case of interactions like in N-H...N-H (amides), the stability depends on the position of resonating electron between H...N nuclei (THE NATURE OF THE CHEMICAL BOND. II. THE ONE-ELECTRON B...

theoretical-chemistry density-functional-theory hydrogen-bond
M.A.Ramezani
M.A.Ramezani
Holy crud! I'm not a DFT scientist!
Sigh I wish @Martin or @Lord was here.
diffracteD
diffracteD
oh ! My bad luck. @M.A.Ramezani I'll try to ask later if they provide some idea.
On the way to success
On the way to success
??
M.A.Ramezani
M.A.Ramezani
????
santiago
santiago
12:53
??????
M.A.Ramezani
M.A.Ramezani
Is this a challenge?
????????
santiago
santiago
????????????????????????????????????????????????????????????????????????????????‌​???????????????????????????????????????????
M.A.Ramezani
M.A.Ramezani
No fair. That's not 10 question marks. Cheater!
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Hippalectryon
Hippalectryon
????????????????????????????????????????????????????????????????????????????????‌​‌​???????????????????????????????????????????????????????????????????????????????‌​????????????????????????????????????????????‌​???????????????????????????????????‌​?????????????????????????????????????????????????????????????????????????????????‌​???????‌​????????????????????????????????????????????????????????????????????????‌​???????????????????????????????????????????????????‌​????????????????????????????‌​???????????????
M.A.Ramezani
M.A.Ramezani
BTW @Manish you need to change your chat about me. You're not pro tempore on chem.SE anymore.
santiago
santiago
12:57
lol... 1 more upvote then I get a silver necromancer
just to annoy @M.A.Ramezani
M.A.Ramezani
M.A.Ramezani
I've been looking for a question to get a necromancer, but to no avail.
03:00 - 13:0013:00 - 15:0015:00 - 21:00

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