any short method for predicting molecular structure?
92358
Just count the (sigma) bonds and the lone electron pairs and memorize the cooresponding geometric shapes.  Sorry, but it's the only way.
525685
You can approach this is one of two ways:\n\n1)  By analogy with H2O (because O and S are both in the same group)\n\n2) From first principles ie octet rule, Lewis diagram, hybridisation, shape. \n\nNow S has 6 electrons in outer shell, while H has 1 each, therefore, S will share 1 e- from each H to complete its octet and each H will share an e- with S so H (which is too small to have 8e-s in outer shell) will have a full outer shell. So S is now covalently bonded to to H atoms, accounting for 4 e-s, with 2 non-bonding pairs. That makes 4 pairs of electrons around S all together, so hybridisation is sp3. Shape is tetrahedral minus two vertices ie bent (just like H2O).\n\nI hope this helps.
848068
ICl2 + should be bent like water since I will have two lone pairs and two Cl's on it.\n\nI3- will be linear\n\nSbCl6- will be octahedral
586117
To get the right answer you need to ask the right question. \n\nWhat you are looking for is tools and techniques for Protein Structure Modeling. \n\nJust type "Protein Structure Modeling" in Google and you should get a bazillion hits!\n\nHere are a few sites to get you going anyway:
872523
You need to specify a compound before we can tell you what its molecular geometry is!
714401
LOL!\n\nLet's guess which types of molecules your homework listed.\n\nI will guess...  A water molecule.
903158
There is ChemDraw, that you can buy\n\nChemSketch is offered online as freeware or shareware (I forget)\n\nIf you want a program that does computational chemistry calculations (DF Theory or Ad Hoc, etc) you might look at buying Spartan.
996933
Tetrahedral\nit has 4 bonding pairs and no lone pairs\nThe angles are 109.5 degrees
254930
Chemfinder.com  \nYou have to register with the site to use it but it's completely free, and about as easy as them come. You can just copy and paste the structure you need.
518616
Check this out....\n\nhttp://www.sciencestuff.com/prod/Chem-Rgnts/C2043
574147
http://www.edu.pe.ca/montaguehigh/grass/chem/notes/ptable.html\nhit print screen.
980626
ChemDraw from CambridgeSoft Corporation may be help you. Look at www.cambridgesoft.com
1049433
http://genchem.chem.wisc.edu/sstutorial/FunChem.htm
956604
Try it out in the lewis-dot diagram\n      ..        ..\nH-O-Ca-O-H\n      ..        ..
1158504
Such specific information is hard to find for free on the web, I will suggest the Cambridge Structural Database
908225
Go to this site and it will show you structures of a whole bunch of molecules with Carbon and without, by formula and by name, kind of mess around with it for a while. http://www.chem.purdue.edu/gchelp/molecules/index.html
1024314
well, not an analytical fan myself, but here is what I know\n\n1) one strong and board absorption bend at 3650-3200 cm^-1 indicates -OH functional group\n\n2) No peaks just above 3000 cm^-1, no sp2 carbon\n\n3) peaks just right of 3000 cm^-1 indicates saturated carbon chain\n\n4) one peak, sharp, right of 1400 cm^-1 indicates methyl group.