hermanntrude

A formula is useless unless you define the terms.

The difference stands (i think) on the level of energy needed to maintain the electron in the shell. You need more energy to keep the electron in the filled s subshell than in half-filed d. That is because the half-filled or full-filled d subshell is more stable than s! It is not the same as the old model, by which first you need to complete s than d!

 

example:

Chromium-24 [math]1s^2 2s^2 2p^6 3s^2 3p^6 4s^1 3d^5[/math]

yes very true. there are a lotf of examples of this kind of thing but it doesnt apply to krypton

most likely you will get a mixture of chlorine and oxygen (and hydrogen at the other end), but i think chlorine would be the favoured product.

I cant be sure, though since i have no idea what a baume is. what happened to moles per litre?

not as simple as you say it is....

Have a look at this link

Start at element 36 and add electrons until you get to xenon (54)

you'll see that indeed the 5s electrons get added first, but then one gets taken away again as you get to niobium (element 41) and then when you get to palladium (element 46), another electron si removed from 5s, leaving it empty. THEN it gets filled up again and the 5p block behaves itself properly.

If you continue, you'll see that the f-block has all sorts of crazy twists and turns.

to be fair, though, the question is about the pressure of CO2 above the champagne, so it IS about a gas and one which is fairly close to ideal.

no, you still don't get it. you can pressurize a liquid very easily. if i have water sitting in a piston and i place a load on it, i will increase the pressure of the liquid.

 

the liquid will not COMPRESS very much(not even a visible amount usually) but the pressure would rise the same amount as if it were a gas.

OK point taken. But Boyle's law doesnt apply.

the liquid will be at the same pressure as the gas above it(well, hydrostatic pressure will result in a higher pressure below the surface but you get the idea).

 

i suspect you were thinking of compression rather than pressure there.

 

you need the equilibrium constant for CO2 solubility.

I meant what I said. it's hard to pressurise a liquid, which makes speaking of its "pressure" usually pointless, since, as you so rightly said, it's most likely going to be the same as the atmospheric pressure or pressure above it.

And yes, we need the Kc to be able to do this problem

are you given a Kp? or a vapor pressure for CO2?

it's not the pressure of the wine you're after, but the pressure of the CO2 over the wine. at least that's what i expect. it's hard to pressurise liquids very much.

you can link to a picture on another website. Upload it to the website, take the link from there, press the button on THIS website which looks like a landscape (it's yellow), then enter the URL in the popup box.

If your picture file isnt already uploaded and you dont know where to upload it to, try an image hosting website. I use imageshack.us

remember always that 4s is always filled first regardless of the arragement.

that's the opposite of what the electron configuration for krypton suggests

I have to admit i don't know the answer to the original question

I think most likely it either means that when the subshells are FULL, they exist in the order noted, and they only overlap when not entirely filled. OR it means that it's just customary to write the shells in their "logical" order (keeping all subshells of a shell together) when they're full, since their relative positions becomes less important.

from wiki:

 

 

 

I hope you find that useful!

so are you saying that in Krypton, the order of the subshells is altered, leaving us with the 3d and 4s the right way round, unlike the other elements?

phenyl cyanide, yes. I dont know about hydrogen cyanide. i dont think i'd even try. I think everyone could smell the phenyl cyanide. I used it in the fume cupboard but people would always complain about the smell anyway.

There really is no such thing as "cyanide". the poisonous stuff you see in the movies is either hydrogen cyanide (if they breathe it) or sodium or potassium cyanide (if they eat it). There are hundreds more.

I never worked with hydrogen cyanide but i did work with phenyl cyanide and that stuff STINKS. I hated the smell of that stuff. And yes it's true, it smells like almonds

did you get the right value of x?

what are the phase symbols in your equation?

pure liquids should be left out of the equilibrium expression. that should help you get x

I'm not really sure i understand your question

For a given value of K, the amounts of products and reactants at equilibrium will always be the same, yes. If the equilibrium is changed, however, by addition of a product or a reactant, or by a change in temperature or pressure or volume, then the quantity of the reactants and products will change to partially offset the change, according to le chatelier's principle, and the direction indicated by a calculation of the reaction quotient.

your first step should have been to find the reaction quotient, Q. that would tell you which direction to expect a shift, which would in turn tell you if it was 1+x or 1-x

Early to bed early to rise.

You should be thankful you can go to sleep easily. It really is a blessing.

Millions of people can't.

early to rise, early to bed, makes a man healthy, wealthy and dead

There is also a small amount of gold in sea-water. I remember a story about a guy who determined the quantity and decided it would be a profitable venture to go out in a boat and concentrate the gold to collect it as a metal. unfortunately he did his math wrong and came back with minimal amounts

I used to have a space-filling model of the world's first unambiguous molecular rectifier, but it'll be somewhere in the archives now, possibly lost for ever.

did you Read the original post?

 

it stated "create it from home substances"

and most importantly "i sadly can not go to buy what i need."

 

so who has nitric acid kicking about the house?

it stated "i cannot go buy" it didn't state "i can't use the internet". Ordering things online is usually something you can manage to do even if you've had both arms aputated, as long as you have good teeth and a stick

you realise of course that the US spellings are now becoming (in most cases, have already become) the standard IUPAC spellings.

I was forced to change every incidence of "sulphur" into "sulfur" when i submitted my PhD. I found it very upsetting.

To clarify, there are far more than five senses. Propioception, for instance, or sense of hunger or thirst, sense of hot and cold etc. Five senses is a myth.

however, it's almost impossible to tell what kind of brain activity there would be without any of them.

As a new father i can defnitely tell you that sleep is a GOOD thing and should not be wasted or frittered away. If you fall asleep, be happy that you can and wake up happy and not with a headache, droppy eyes and that feeling that the world is covered in a giant blanket