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  • I remember seeing a periodic table that had the top-left corner of the d-block shaded and marked as "brittle". If I recall correctly, the elements were $\ce{Sc,Ti,V,Cr,Mn,Y,Zr,Nb,La}$. I think (Sorry,...

  • I'm reading a paper1 by Sanakis, et al. that characterises the magnetic coupling in the $\ce{Fe3S4}$ clusters present in bacterial ferredoxin II and beef heart aconitase as arising through something c...

  • 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...

  • I just read that saturated palladium hydride, $\ce{PdH}$0.7, when exposed to oxygen will generate heat and water on it's surface, $\ce{4 H}$(Pd) $\ce{+O2}$(g) $\ce{\to 2 H2O}$(g, l). What is going on...

  • Part of the total reaction is mentioned here: http://chemistry.about.com/od/demonstrationsexperiments/ht/instantfire.htm $\ce{2KClO3(s)} + \text{heat} \rightarrow 2\ce{KCl(s)} + 3\ce{O2(g)}$ The re...

  • My teacher gave us the equations for zero-order, first-order and second-order reactions as follows: $$ [A]_t = -akt + [A]_0 $$ $$ \ln [A]_t=-akt+\ln [A]_0$$ $$\frac1{[A]_t}=akt+\frac1{[A]_0}$$ Wher...

  • $$\ce{HCO_3^{-}(aq) + H_2O(l) <-> H_2CO_3(aq) +OH^-(aq)}$$ I do not understand why this makes an Arrhenius base and why it doesn't form: $$\ce{HCO_3^{-}(aq) + H_2O(l) <-> CO_3^{2-}(aq...

  • A metal oxide contains $60$% metal.The equivalent weight of metal is (1) $12$ (2) $60$ (3) $40$ (4) $24$ I know that the equivalent weight of metal oxide = equivalent weight of metal + 8.But how ...

  • I must confess, I am not a chemistry student but have always been a fan of it, so I am not sure if this is a blunder. I have often wondered if Thermoplastics can ever be converted to or made to beha...

  • I understand the fundamental principles of NMR spectroscopy, however what I fail to do is apply my understanding in order to form a structure of the molecule in question. My difficulties are the fol...

  • How do we represent a molecule in text form? A molecule, as a computer scientist I see it as a connected graph of atoms. A connected graph means that beginning at any atom, there is a path to any oth...

  • According to my teacher, Na in ethanol reduce carbonyl compounds (e.g. aldehydes and ketones) to alcohols. However, I can't see where the hydrogen needed for reduction comes from. How does the reducti...

  • I have some questions regarding how to read a MALDI mass spectrum in a paper. I am a biologist by training, so I would like some analytical chemists to help me out. The researchers ran a western blot...

  • To explain the characteristic X-ray emission peaks for various elemental targets, a formula was developed which was similar in construct to the rydberg equation for H-atom as derived by the Bohr-model...

  • How to convert glucose to fructose? Moreover, can there be direct conversion(not necessarily in a single step), or we have to use indirect means, such as from sucrose, or other higher carbohydrates, a...

  • In an exercise I have the following structures Moclobemide: Paracetamol: Hexobarbital: I know for example by heart that paracetamol is an acid. What is the best approach in determination of ac...

  • Why is $M_1V_1 = M_2V_2$ only used for diluting solutions? Why can it not be used to figure out how many moles to add to make a solution more dilute?

  • An electrode can be plated by having a solution full of electrolyte, using the the metal that will receive the plating as the cathode, and the metal doing the plating as the anode. Current is put thro...

  • A frozen urine specimen is required for an organic acids lab test, but the urine refuses to freeze after 4 days in a regular freezer turned as low as it will go. What would explain this, and how cold ...

  • what is the kinetic theory of matter and what are the assumptions made regarding the theory in order to explain the behavior of matter? well i have searched it and the assumption i got was Matter con...