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• I have been reading about resolution in Mass Spectrometry and there are a few things I do not understand. The resolving power is determined by m/(m2-m1) at full width half height of a peak. The highe...

• It's possible to select a perfluorinated hydrocarbon that is immiscible in another organic solvent, forming a distinct phase boundary. Such systems may become miscible at elevated temperature which is...

• I am looking for a liquid which is not miscible (or very close) with water or vegetable oil. Ideally, I want to have a container which shows three layers (the three liquids) with clear boundary layer...

• When an electron is added to cesium, why is energy released?

• Ok, this is a simple problem, but I cant see how to get the answer. I calculated the activity coefficient, $\gamma_\pm$ = 0.389, and I need to find the activity $a_\pm$ for a 0.0120m solution of $Na_3... • I was trying to figure out the different peaks in a XPS spectrum for Molybdenum, but I could not understand them. About XPS, I know that this technique is based on the binding energy of the electrons ... • I do not understand how equation(3) occurs.(taken from the book Internal Combustion Engines by John B.Heywood)  Consider a reactive mixture of ideal gases. The reactant species$M_a,M_b$etc.and ... • I am having trouble understanding how valence electrons are counted in Helium. My references are: Here where it appears that Helium has 0 valence electrons because the shells are finished Here whe... • My question pertains generally to any form of spectroscopy, but I'll focus on UV spectroscopy. I am trying to get information on carrying out spectroscopy, but most of it is theoretical. Wikipedia is ... • What is the most logical and easy to remember step by step method for drawing Lewis dot structures? I'm having trouble drawing a simple one for$CO_2$. • With regards to complexes, I read that thermodynamic products are favored over kinetic products, which are labile. Why wouldn't the first product formed be the most prominent? • My attempt:Based on symmetry:I think that looking for symmetry phenol has higher boiling point than 1,2-dihydrobenzene because the two -OH groups projecting out from he benzene ring of 1,2-dihydrobenz... • At what temperature will create amorphous TiSi? I think it's around 500 Celsius but I'm not sure. thanks in advance • What are the precise conditions under which Benzene undergoes ozonolysis? All anyone can tell me is that it undergoes ozonolysis under "vigorous" conditions. But, what vigorous conditions? • This data was taken for my science fair project, and I would like to know the relationship between spectrophotometer absorbance and cell density (taken manually) of algae after a toxicity test. The di... • What sort of ideal conditions are required - theoretically - to conduct polymerization reactions to make all the macromolecules end up with exactly the same molecular mass, just like the products in n... • A sample of gas in a balloon has an initial temperature of 5 °C and a volume of 1010L . If the temperature changes to 59 °C, and there is no change of pressure or amount of gas, what is the new volum... • At the triple point of water how do the entropies of solid, liquid, and gas compare? I think that either they will be equal or it will be that gas > liquid > solid. I don't know if entropy i... • Although the wikipedia page on Hydronium indicates a pKa of -1.74, I noticed in the discussion of this page that the subject seems debated (cf. http://en.wikipedia.org/wiki/Talk:Hydronium#pKa.3F) sinc... • I am doing a project in which I fill a cylinder with a volume of$636cm^2$(made of stainless steel) with molten salt: 60% Sodium Nitrate ($NaNO_3$) and 40% Potassium Nitrate($KNO_3\$). The container ...

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