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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?
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.
Aromatic Compounds |
Liquids |
Molecular Mechanics / Dynamics |
Molecular Properties / Structure |
Physical Properties |
Surface Science |
Noncovalent Interactions
Incomplete Combustion of Hydrogen: Trapping a Reaction IntermediateBruce Mattson and Trisha Hoette In this demonstration, a hydrogen flame is played across the face of an ice cube and the combustion is quenched in an incomplete state. The resulting solution contains a stable side-product, hydrogen peroxide, whose presence can be verified with two simple chemical tests. Mattson, Bruce; Hoette, Trisha. J. Chem. Educ.2007, 84, 1668.
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.
