1. M

    Understanding lewis structure answer

    The following picture is a posted solution to an earlier exam, The question was to draw Ca (s) + Br2 (g) = CaBr2 as a lewis structure, the suggested answer was like this: I understand that this forms an ionic bond given that Ca (metal) donated electrons to Br (non metal) and becomes...
  2. P

    Lithium and Fluoride ionic bond

    Can someone please help me explain in a simple way what happens to both these elements after a ionic bond. Thanks.
  3. F

    What type of bond is there in sodium

    Hello What type of bond is there in sodium
  4. S

    UV/Vis-Absorbtion and bond dissotiation

    Hello, I am currently studying for my analytics class at university and something provoked me. I learned, that in UV/Vis-Absorption electrons in the molecule get excited, so as to switch from a HOMO to a LUMO state. I was wondering, if therefore the homolytic bond cleavage of halogens by light...
  5. S

    Need Chemistry help with Illustrating bond with vectors for electronegative atom.

    Need Chemistry help with Illustrating bond with vectors for electronegative atom.? When illustrating bond dipoles, vectors point from the ________ electronegative atom to the _______ electronegative atom. more, less less, more both A and B neither A or B
  6. D

    Hydrogen Bond Information for Kevlar

    Hi all, I'm trying to find information on the hydrogen bond length and hydrogen bond angle for kevlar before failure occurs (I have the equilibrium values). Would anyone happen to know these values and/or have experimental data/sources to corroborate them? If not for kevlar, would anyone happen...
  7. E

    Cubic perovskite bond distances and tolerance factor

    If an ideal cubic perovskite ABO3 has cell parameter 3.905 angstroms, how would I work out the A-O and B-O bond distances for this compound? I thought maybe halving the cell parameter would give the B-O distance, and finding out the diagonal of the cube and halving it would give the A-O bond...
  8. L

    No of C=C bond in carbonyl compound

    Compound X has the following composition by mass : carbon(64.3%) , 7.1% of hydrogen and oxygen (28.6%) . X reduces Fehling's solution to CuO . Copper( I) oxide .0.1 mol of X react with 4480cm3 of hydrogen gas in the presence of nickel catalyst. What 's the possible structural formula of X ...
  9. N

    Bond formation vs bond dissociation

    Hi all, First time poster, basic Chemistry understanding Why is bond dissociation value not the opposite of bond formation value? Putting something together gives a different value to taking it apart? If I'm well off the mark can you advise where I can see the two compared Regards
  10. J

    Help in Explanation of structure of hexaammini Ni +2 according to Valence bond theory

    NH3 is a strong ligand...and there remains 2 unpaired electrons in 3d orbital of Ni(+2)...then why doesnt back pairing occur to vacant one 3d orbital due to strong ligand and dsp3d(which doesnt exist) hybridisation occur????i know that it is just a case of outer orbital complex with strong...
  11. Q

    Using Bond Dissociation Energies to Approximate Heat of Combustion for Pentane

    First. I am meant to have a table of bond dissociation values in my book, but we use a different edition so these are not available to me. Second. How do I know how to set up the formula once I have the values? Do I draw a structural diagram to show the bonds? Thank you. Once I know how to...
  12. Q

    How to determine Approx. Delta H using bond dissociation energies?

    Please explain the formula and values for the following reactions, as my book does not have a table to search for the bond dissociation values. Ethanol and Acetic Acid to form Ethyl Acetate Water and Propene to form Isopropyl Alcohol Thank you
  13. A

    H-C triple bond C-H why it is sp?

    H-C triple bond C-H why it is sp? Since this has 2 double bond and 1 triple bond is it not sp2 .Pl clarify Thanks
  14. H

    intermediate bond types

    It is said that the higher the charge of the cation, the greater the ablilty to push electron cloud on anion, creating distorsion so some degree of sharing occurs. So this sharing of electrons will weaken the ionic bonds and result in a lower melting point? Like eg. AlCl3 has low melting point...