The Periodic Table

11:19 AM

@gavin where does the radical come from?

No idea. These are half cell potentials from the list of standard electrode potentials and this involves peroxide, so I guess you'd start with that.

DHMO

11:46 AM

alright

Rubisco

Hullo @Gavin! Welcome to chat!

Gavin Machell

@Rubisco Hi there

Rubisco

How're ya doing?

Gavin Machell

Am fine thanks for asking - how're you?

Rubisco

Great

I'm having Trumps.

Gavin Machell

11:56 AM

I wish there was a supository for that.

Rubisco

i.e. cheetos

Gavin Machell

Oh, I thought you were being political

Rubisco

Well, it's kinda a political joke

Gavin Machell

Gotcha.

Rubisco

Downvoted thingy of the day

-18

Q: Should people answering questions be allowed to vote on other answers [to same question]?

Personal experience: I answer a question that had too little attention with a problem I found compelling, so I spend some time reproducing the problem and propose what I think is an applicable solution. More than 48 hours later with absolutely no activity during that time except a second potentia...

feature-request

I see three very different answers, none of them being really ALL the differences between the two compounds. If half of the questions on this site were like yours, all the experts you seek answers from would've packed on and moved. In other words, you're misusing the site, not using it. — Rubisco 6 secs ago

This guy is really, I MEAN REALLY, getting on my nerves

Jan

12:12 PM

@Rubisco I thought I said yesterday I would post something yesterday? I didn't hear any immediate complaint …

Rubisco

@Jan . . .

YOU MISUSED MY ATTENTION SPAN

Jan

I beg your pardon =C

Rubisco

I don't remember you saying you'd post something right away

So either I was careless, or I was careless

Jan

16 hours ago, by Jan

@Rubisco I was thinking of doing that. I’ll do it later today =3

Rubisco

Shit.

DHMO

12:17 PM

@enzyme what's your new name?

Rubisco

Not yet decided

DHMO

i'll call you cyanide then

Jan

Btw, I deleted the question.

DHMO

@Jan whyyyyyyyyyy

Rubisco

2 mins ago, by DHMO

@Jan whyyyyyyyyyy

As Lord Mart says, this site is slooooow

Jan

12:21 PM

@Rubisco Please decide whether it was too soon or not ô.o

Rubisco

It wasn't

Undelete it

Jan

*facepalm*

Rubisco

Unnerving is not that profitable a business but it's fun.

Jan

There you go, undeleted.

Should I now go and delete it again?

Rubisco

Add an answer of your own

CowperKettle

12:34 PM

Afternoon!

> Sheath Gas Flow Rate: 40 arb
Aux/Sweep Gas Flow Rate: 20 arb

What could this "arb" mean?

DHMO

@CowperKettle context

arbitrary unit

CowperKettle

@DHMO MS ionization source

DHMO

Source:

Arbitrary unit

In science and technology, an arbitrary unit (abbreviated arb. unit, see below) or procedure defined unit (p.d.u.) is a relative unit of measurement to show the ratio of amount of substance, intensity, or other quantities, to a predetermined reference measurement. The reference measurement is typically defined by the local laboratories or dependent on individual measurement apparatus. It is therefore impossible to compare "1 arb. unit" by one measurer and "1000 arb. unit" by another measurer without detailed prior knowledge on how the respective "arbitrary units" were defined; thus, the unit is...

CowperKettle

@DHMO so I guessed!

@DHMO thank you!

DHMO

How many double bonds maximum for chromium?

CowperKettle

12:36 PM

Dunno

DHMO

is CrO3 hypervalent?

20 valence electrons

CowperKettle

@Rubisco To me, everything above 24C is "frying" (0;

Jan

@DHMO Cr^6+ and 3 O^2- ;)

DHMO

@Jan why are they depicted as having double bonds?

pentavalentcarbon

@orthocresol That's all it is, IIRC. There is a J Chem Ed somewhere out there about how the inversion is actually mediated by tunneling through a barrier.

DHMO

12:41 PM

@Jan I guess this is more accurate:

this actually obeys the 18-electron rule

Jan

@DHMO Yes! =)

@DHMO Because Linus Pauling hated formal charges.

DHMO

@Jan do you happen to know why it is not planar?

it is C3v instead of D3h

on the other hand, sulfur trioxide is planar.

Jan

Nope, I don't. I would've assumed D3h, I think.

DHMO

@Jan on the other hand, its dimer is bonded like diborane...

(D2h)

the O=Cr=O angle is 113.3 deg

slightly less than 120 deg (planar SO3)

@Jan another clue: CrO3^- is planar

Jan

12:57 PM

CrO3- has a different oxidation state than CrO3 and thus is irrelevant ;)

DHMO

:o

CowperKettle

1:27 PM

I don't understand what "tube lens" is - and why it is "lens"

I was told by the Russian author that the Russian phrase "transporting capillary" is translated as "tube lens"

O_O

So "transporting capillary voltage: 85 V" is "tube lens voltage: 85 V"

I thought that "lens" meant "concave or convex item for focusing or defocusing rays"

orthocresol

@Jan I don't know. I thought it was too soon and that it might affect the election itself.

CowperKettle

0

Q: What is a "tube lens" in a mass-spectrometer ion source and what does it do?

I came across the Russian phrase "Transporting capillary voltage: 85 V" in a text I was translating. The paragraph was describing the operating parameters of an electrospray ionization-based ion source in an MS system. The author told me that the proper English translation is "Tube lens voltage...

terminology mass-spectrometry

orthocresol

1:43 PM

But, I don't really want to be a spoilsport. And if it affects the election process, then so be it. I'm not going to throw a tantrum and leave the site if I'm not elected, or if someone I didn't vote for is elected.

Which is why I deleted my comment earlier (before I saw your reply actually) :)

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