Ask a physicist anything. (2)

[Chesterton]

LOL

So sad.. but so true.

http://www.youtube.com/watch?v=yi3erdgVVTw

I'll give those hippies credit. I think they knew exactly what dihydrogen oxide is. They are nihilistic anarchists. They want to ban water, and therefore life.

 

[canehdianhotstuff]

So it's like a 'one part iron, 5000 parts hydrogen' thing? Interesting. How did they work that out?

I puzzled all day trying to figure it out and couldnt. I came to the conclusion of an empirical formula of

C3910O10313H23925N598Ca95P82K26S24Na22Cl14Mg9Fe

I used the % body composition of each element in the body and this online calculator...saves me the work lol.

Empirical Formula Calculator

so, unless they used significantly different %composition or have some other factor in play I do not know about, I dunno lol.

 

[canehdianhotstuff]

And it is dihydrogen monoxide. The prefix is required.

 

[TerranceL]

You'd end up with a stunningly handsome British gentlemen who peruses internet forums .

If he says so himself! lol

 

[catzrfluffy]

I was the answer to a question in Why Don't Penguin's Feet Freeze?, a book I found in my room, here's the quote,

"By weight, oxygen amounts to about two-thirds of the body, followed by carbon at 20 per cent and nitrogen at 3 per cent. Elements originating from pollutants would only be present in trace amounts.
If a human body were broken into single atoms, we would arrive at an empirical formula H[sub]15750[/sub]N[sub]310[/sub]O[sub]6500[/sub]C[sub]2250[/sub]Ca[sub]63[/sub]P[sub]48[/sub]K[sub]15[/sub]S[sub]15[/sub]Na[sub]10[/sub]Cl[sub]6[/sub]Mg[sub]3[/sub]Fe[sub]1[/sub]. The relative numbers of atoms in this differ from the composition by weight because atoms have different masses."

That probably makes more sense to you than it does to me. I don't like being stupid. Ah well.

 

[canehdianhotstuff]

Yes, I understand all that, and used % composition from several sources, they vary little. I would really like to see the math or at very least the raw data they used to get this.

 

[pgp_protector]

C[sup]3910[/sup]O[sup]10313[/sup]H[sup]23925[/sup]N[sup]598[/sup]Ca[sup]95[/sup]P[sup]82[/sup]K[sup]26[/sup]S[sup]24[/sup]Na[sup]22[/sup]Cl[sup]14[/sup]Mg[sup]9[/sup]Fe

Hmm no Tuna eaters I guess, I don't see any Hg in that formula

 

[catzrfluffy]

What are the two most reactive elements, with each other?

 

[pgp_protector]

What are the two most reactive elements, with each other?

Fluorine and just about anything else I'd guess


EDIT:
Well except maybe the Noble Gases

 

[canehdianhotstuff]

Would depend on how you define "most reactive". Fluorine is no doubt the most reactive element.

The most exothermic reaction I know is the one to make thermite.

 

[Cabal]

Would depend on how you define "most reactive". Fluorine is no doubt the most reactive element.

Francium, surely?

The most exothermic reaction I know is the one to make thermite.

You seem to know a good bit more about chemistry - how exactly does one define the...(not sure what word to use)..."efficiency" of a chemical reaction?

 

[pgp_protector]

Hmm I wonder if I just made any list searching for Fluorine Francium reactions

 

[Wiccan_Child]

Francium, surely?

You seem to know a good bit more about chemistry - how exactly does one define the...(not sure what word to use)..."efficiency" of a chemical reaction?

Energy out to energy in? Amount of product made to amount of reactant needed (some reactions will convert more reactant to product than others, thus being more efficient)?

 

[Wiccan_Child]

Hmm I wonder if I just made any list searching for Fluorine Francium reactions

Probably several government lists for the mentally ill...

 

[Cabal]

When I was in high school I loved the warnings in our chem textbooks saying to NEVAR react alkali metals with acid.

I often wondered what sort of kablammo you'd get if you tossed a big hunk of francium (fat chance, I know) into something really nasty, like hydrofluoric acid.

 

[pgp_protector]

Probably several government lists for the mentally ill...

Naa I'm already on them

 

[Cabal]

Energy out to energy in? Amount of product made to amount of reactant needed (some reactions will convert more reactant to product than others, thus being more efficient)?

Yeah, I figured it'd be something like that. Can't say I've ever done that kind of calculation before.

 

[pgp_protector]

http://www.youtube.com/watch?v=PyFLvSg6ZDw

 

[canehdianhotstuff]

Francium has a high ioniziation energy because it has a low electronegativity and a huge atomic radius. Basically in solution it's ionic bond will break very easily. This is why hydroiodic acid is considered a stronger acid than hydrofluoric acid. Iodine ionizes more so than fluorine.

I suppose the efficiency of an reaction would be based on its speed and how much of the reactants are used to produce the products. Some reactions even in excess of one reactant will go less than 100% to completion. Others will go to 100% completion.

 

[canehdianhotstuff]

When I was in high school I loved the warnings in our chem textbooks saying to NEVAR react alkali metals with acid.

I often wondered what sort of kablammo you'd get if you tossed a big hunk of francium (fat chance, I know) into something really nasty, like hydrofluoric acid.

5lbs of potassium metal into a river