> I can pick up a mole (animal) and throw it.[citation needed] Anything I can throw weighs one pound. One pound is one kilogram. The number 602,214,129,000,000,000,000,000 looks about twice as long as a trillion, which means it’s about a trillion trillion. I happen to remember that a trillion trillion kilograms is how much a planet weighs. … if anyone asks, I did not tell you it was ok to do math like this.
@Nova I assume you mean cerium (Ce), not caesium (Cs). My guess is that, after Ce(IV) is done oxidising your sample, it oxidises the Fe(II) to Fe(III) which changes the colour of the indicator. So the change in colour tells you when your sample has been fully oxidised.
I am assuming your indicator contains Fe(II). Other indicators may contain other metal ions, or perhaps none at all. Just replace accordingly.
So if you really want to think about it in terms of electron transfer, initially your sample is transferring electrons to Ce(IV). Then when your sample has no more electrons left to transfer, the indicator will transfer some of its electrons to Ce(IV). When the indicator loses electrons it changes colour.
However, I'd recommend you just think about it in terms of simple oxidation or reduction, instead of electron transferred from A to B, unless you are worried about the mechanism of the redox reaction.
I'll be back in about 10 mins, you can tell me your plans then... and i will tell you stuff about what you tell me... and then you can tell me stuff about the stuff that i told you...
and if anyone else has stuff to tell, we can tell stuff about that stuff too
since for every orientation of the molecule, we can reverse the orientation such that the light appears to be falling on the molecule from a direction other than the one for our original molecule.
This is false.
Let's take 2-butanol. For this stereoisomer, light is turning clockwise when vi...
However, it is not quite obvious, which step is actually wrong.
I think, from the second to the third picture, when the molecule is simultaneously rotated by 180° around the vertical axis and by 180° around the horizontal axis, one disc representing the polarization is only rotated by 90°.
Yes, step 2 to step 3 is a rotation of the molecule (180° around a vertical axis as the discs are) followed by flipping of the molecule by $\sigma_\mathrm{h}$ to the vertical $C_2$ axis.
Actually no, it's not …
Followed by rotation around a perpendicular $C_2$ axis.
And the disc is rotated by 180° and then flipped.
The final image of the discs seems to be correct …
But he shouldn't flip the molecule but rather keep it the same, shouldn't he? Minute rotation from 'the back of the disc is slightly pointing forward' to 'the front of the disc is slightly pointing forward'.
I think I've figured it all out, @Loong. I hope that conflicts with your view for maximised confusion ;)
@Martin-マーチン Not sure about the physical part of the description, but the drawings are more than is said. There are extra flips and rotations here and there that are not part of what @ManishEarth said in the surrounding text.
I guess, picture 1 and 2 would be already sufficient for the explanation. The polarization is turned counterclockwise when the light goes from left to right as well as when it goes from right to left.
well, gather the intel on hw and then we see... I don't see us getting a new policy this year, with all the holidays in the way, people hardly have time to care for stuff like this.... and since this is a replacement thing, it really needs votes...
room topic changed to The Periodic Table: Haikus are awesome / Chemistry is even better / So pull up a chair [blowing-the-lab-up] [german-stuff] [hullo] [love-you-all] [martin] [table-flipping] [tre] [welcome]
I currently have a file on the root of my external hard drive simply named ._., which I am guessing was added to my hard drive after using it on my MacBook a while ago. I'm trying to delete this file on my Windows 10 machine; however Windows keeps claiming the file cannot be found.
I also tri...
Idk what happened? It was working fine, and the next day when I started it, the screen wouldn't change at all (always black). I changed the ram, removed the battery, ...., nothing would fix it. And it wasn't beeping anymore like it should do when it's RAM-less.
All of the following are solutions except:
Ocean water
24 karat old nugget
a concrete building block
a sterling silver bracelet
I need help balancing this and solving a few others. and solving this, it confuses me
H2SO4 + NaOH = H2O + Na2So4
since for every orientation of the molecule, we can reverse the orientation such that the light appears to be falling on the molecule from a direction other than the one for our original molecule.
This is false.
Let's take 2-butanol. For this stereoisomer, light is turning clockwise when vi...
I currently have a file on the root of my external hard drive simply named ._., which I am guessing was added to my hard drive after using it on my MacBook a while ago. I'm trying to delete this file on my Windows 10 machine; however Windows keeps claiming the file cannot be found.
I also tri...
The Periodic Table
The Periodic Table