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Bonding : DetermineStructure (8 Variations) H
A substance is analyzed and found to contain 57.10% carbon, 4.80% hydrogen and 38.06% oxygen by weight. Its molecular weight is determined to be 126.11 g/mol. Which of the structures shown are possible structures for the substance?
Enter the numeric value very carefully below, rounding to one decimal place only. Do not put the units in, but think about what the
units are!
Molecular Properties / Structure |
Stoichiometry
Gases : IDGasFromVelocity (8 Variations)
The following are graphs of molecular velocities versus the relative number of molecules for argon, chlorine, methane and xenon at 300K. Which graph is for argon?
Diamagnetic Corrections and Pascal's ConstantsGordon A. Bain and John F. Berry This article presents an explanation for the origin of diamagnetic correction factors, comprehensive tables of diamagnetic constants and their application to calculate diamagnetic susceptibility, and a simple method for estimating the correct order of magnitude for the diamagnetic correction for any given compound. Bain, Gordon A.; Berry, John F. J. Chem. Educ.2008, 85, 532.
Laboratory Computing / Interfacing |
Magnetic Properties |
Molecular Properties / Structure |
Physical Properties |
Transition Elements
Origin of the Formulas of Dihydrogen and Other Simple MoleculesAndrew Williams The logic and experimental data are described with which chemists originally deduced the formulas of fundamental substances such as H2, H2O, Cl2, NH3, CH4, and HCl. It is argued that high school and first-year undergraduate students would gain substantially from exposure to this process. Williams, Andrew. J. Chem. Educ.2007, 84, 1779.
Enrichment / Review Materials |
Molecular Properties / Structure
Dancing Crystals: A Dramatic Illustration of Intermolecular ForcesDonald W. Mundell Crystals of naphthalene form on the surface of an acetone solution and dance about in an animated fashion illustrating surface tension, crystallization, and intermolecular forces. Additional experiments reveal the properties of the solution and previous demonstrations of surface motion are explored. Mundell, Donald W. J. Chem. Educ.2007, 84, 1773.
The Shapes of MoleculesEd Vitz, John W. Moore A section of ChemPrime, the Chemical Educations Digital Library's free General Chemistry textbook.
Molecular Properties / Structure
Multiple Bonds and Molecular ShapesEd Vitz, John W. Moore A section of ChemPrime, the Chemical Educations Digital Library's free General Chemistry textbook.
Molecular Properties / Structure
Monomer of KevlarWilliam F. Coleman The WebWare Molecules for July are from the paper Modern Sport and Chemistry: What a Chemically Aware Sports Fanatic Should Know by Giffin, Boone, Cole, McKay and Kopitzke.
