The Periodic Table

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12:27 AM

Q: Electron transference during ionisation

This is a quote from my textbook: The irregular trend in the first ionisation enthalpy of 3d lmetals,can be accounted for by considering that the removal of one electron alters the relative energies of 4s and 3d orbitals. So the unipositive ions have dn configuration with no 4s electrons.Ther...

2 hours later…

user8718165

2:44 AM

@GuruVishnu got it. No worries :)

Hello! Could someone please tell me the IUPAC name of Benzyl chloride? Wiki says the preferred one is chloromethyl benzene. I get this. But my book says it's chlorophenyl methane. I'm not getting this. Have they taken the molecule as a derivative of the side chain? Please help me. Thanks :)

1,3-feeds

3:15 AM

Q: How is this question off-topic?

What does it mean to 'fuse' ores? I think I was pretty precise of what I didn't get and still the question was closed for being offtopic... what is the logic behind it?

discussion

2 hours later…

Guru Vishnu

4:53 AM

@Mithoron Thank you for your reply :). I understood your point. And thanks for sharing the manual.

2 hours later…

Guru Vishnu

6:40 AM

@user8718165 Sometimes, we might have two or more different IUPAC names for a particular compound without defying any rule. This is where Preferred IUPAC name is used to avoid ambiguity.

2 hours later…

user8718165

8:13 AM

@GuruVishnu okay. Thanks a lot for your reply :)

5 hours later…

Martin - マーチン

1:08 PM

Someone could do me a huge favour and check whether I haven't made a mistake in this calculation: How to calculate the partial pressure of oxygen in this mixture of oxygen and argon? Thanks very much!

4 hours later…

Martin - マーチン

4:39 PM

:53529503 Well, that's what I said...

Oh, why did you delete?

Loong

Nevermind, this computer was set to German decimal comma, so I got wrong results.

Martin - マーチン

Haha, I was struggling with that same problem O.o

Loong

And when using medieval witchcraft units like mmHg, you don't notice if the results don't make sense. ;-)

Martin - マーチン

I was really pissed about that, too

Loong

So, just looking at the densities, the problem should be okay.

The given mixture has a density of 19.3 g/16.2 l = 1.19 g/l.

Pure argon at the given temperature and pressure has a density of 1.3683 g/l.

Pure oxygen at the given temperature and pressure has a density of 1.0961 g/l.

Thus, there should be a certain mixture with the given density of 1.19 g/l.

@Martin-マーチン Could you check your value for R?

looks like a typo

Martin - マーチン

4:52 PM

yes I will

oh yes... 3.314 ???

Loong

I guess that should be 8.314

Martin - マーチン

yes, yes it should

Martin - マーチン

5:23 PM

@Loong Thanks a lot, it now works.

Loong

great :-)

Martin - マーチン

Also, I quoted you there ;)

Loong

I saw that. :-D

Mithoron

5:50 PM

A: Can fluorine act as the central atom in interhalogen compounds?

As a practical example there is (1) a fluorine-bridged iodine structure of $\ce{[R_\text{f} - I - F - I - R_\text{f}]-}$ composition with 5-centered 6-electron bond stabilized by fluorine in the middle: Here is an isolated anionic part of tris(diethylamino)sulfonium bis((perfluorophenyl)iodo)...