Recent content by Chemist20

Hi there, Does anyone know why large scale ammonia (60000 tons) storage is done under a temperature of -33ºC and P=1bar? Why not a bit higher P and T?

thanks a lot for the effort, but I don't quite see what this has to do with the fuel. I mean, voltaje? I thought that in the fuel oil main ring the fuel was circulating, not electricity! thanks again!:)

Sorry, I explained myself pretty badly! Okay, so the fuel gas is used for the heater. and the amount which is left unused is taken to the "fuel gas ring main", and I haven't got a clue of what that is! thanks :)

Aparently the fuel gas is used for the heater in the production of benzene from toluene. But once this, it goes to the fuel gas ring main which I have no clue of what it is! Help :)

Yes.. they aren't of pure methanol! they are mixtures of methanol with various solvents... :-(

PLEASE! I need to find a pressure-temperature phase diagram por PURE methanol! it's driving me mad...

is it true to say that any molecule having a centre of symmetry will have the symmetric stretching IR inactive? thanks!

that would be the pairing energy right?

the following?: low-spin d5 metal. Energy = -2Δ -4K (where K is exchange energy. i,e. minimization of energy due to parallel spins) low-spin d6 metal. Energy = -1.6Δ -3K Therefore: energy needed to add an electron = ΔE= 0.4Δ + K Is that correct? maybe I should be talking about...

...but, is it true that K*T = hv ? Being K Boltzmann constant...and v the frequency. Because I have seen this exercise, in which they just say that a sample A in thermal equilibrium (maybe this is the bit that I'm missing out...) absorbs light at 697cm-1, so the temperature of the sample is...

Yes but IF I'm just told that a certain organic compound doesn't have any characteristic IR what does that mean?.

Any ideas? Thanks so much!

woops okay. so I am guessing the answer is 110 but i don't know why.!

( 0 0 1) ?

perfect! thanks so much!