Alkanes This is the correct chemical term for compounds known as paraffins. They are considered the simplest organic compounds and are a family of chain hydrocarbons having the general formula C2H2n+2. All of the bonds are single bonds (-C-H-‚ and -C-C-). The chains can be straight or branched. The smaller members (less than 4 carbons) are gases‚ while larger ones (five to seventeen carbons) are liquids. Beyond seventeen carbons the alkanes are waxy solids. Structure: The simplest saturated acyclic
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Published on Web 05/25/2006 A Solid-State 95Mo NMR and Computational Investigation of Dodecahedral and Square Antiprismatic Octacyanomolybdate(IV) Anions: Is the Point-Charge Approximation an Accurate Probe of Local Symmetry? Michelle A. M. Forgeron and Roderick E. Wasylishen* Contribution from the Department of Chemistry‚ Gunning/Lemieux Chemistry Centre‚ UniVersity of Alberta‚ Edmonton‚ Alberta‚ Canada T6G 2G2 Received January 6‚ 2006; Revised Manuscript Received April 6‚ 2006; E-mail:
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Australopithecus * A. afarensis * 3.9-3 mya * Only found in East Africa * At least 120 individuals found (well represented) * Skull shows it was small brained * Had a small degree of post-orbital constriction * Small to no sagittal crests * Have large brow ridges * Large nuchal crest * Fairly prognothic – gives a concave appearance to the face * Teeth = ape-like (very large canines) * U shaped
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Conductivity in metal-organic frameworks Metal–organic frameworks (MOFs)‚ are a class of crystalline materials whose crystal structure is made up from metal-containing clusters connected by multidentate organic linkers1‚2. MOFs are attracting considerable attention due to the possible rational design of crystal structures of coordination frameworks with versatile metal ions and organic ligands. In principle‚ MOFs topologies along with intermolecular distances between various building blocks can be
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Introduction Galileo Galilei is considered to be the most predominant scientists during the 17th century for the astronomical discoveries that he made using a telescope. He utilized the telescope in the year of 1616. Galileo faced numerous challenges and remarkable discoveries which impacted science forever. The telescope was first invented by a Dutch eyeglass maker named Hans Lippershey in 1608‚ but it was Galileo who first commenced the astronomical discoveries by pointing the telescope towards
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experiment” * Electron cloud theory * Discovered that the nucleus has a positive charge * Most of the atom is empty space * Neils Bohr – planetary model (2D) worked with hydrogen * Worked with Rutherford * Electrons have specific orbitals where they travel (n) * Attraction of the positive nucleus to the electron * Erwin Schrodinger (1927) – described atom and its particle behaviour through mathematics * Heralded “quantum physics” * electrons as wavelengths‚ not particles
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(mass=145g) with change in velocity of 0.11 m/s. 4. Fill in the following. | Number of orbitals | Number of electrons that can be held | n=3 | | | 4p subshell | | | 3px | | | 2f subshell | | | 5. Give the full electron configuration of the followings. For (a)‚ indicate the inner and valence electrons. (a) 14Si (b) 25Mn3+ 6. Give the condensed electron configuration and orbital diagram for 22Ti. Then determine whether the atom is paramagnetic or diamagnetic. 7. Determine
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TUTORIAL 1: STK1503 BENZENE AND AROMATIC 1. Draw structures corresponding to the names given. a. m-fluoronitrobenzene b. p o-chlorophenol c. o-chlorophenol d. 3‚5-dimethylbenzoic acid e. 1-phenyl-3-methylpentane 2. Provide correct IUPAC names for each of the following compounds. a. NO2 CH3 b. c. CH3 d. NH2 H2N CH3 e. Ph C H3 C C CH2CH2CH3 Ph 3. For each molecule below‚ predict whether the molecule would be expected to show aromatic character or not. Explain your answer
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02.07 Module Two Review and DBA Please be sure you review and are comfortable with the following topics before completing the Discussion-Based Assessment and the Module Exam: Lesson 02.01: Early Chemistry and Atomic Structure * Describe the changes in the atomic model over time. * Explain how different observations and experiments led to changes in the atomic model. Lesson 02.02: Properties of the Atom * Describe the properties and locations of protons‚ neutrons‚ and electrons in an
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Chemistry 123 Fall ’14 Exam I (CH I‚ II‚ III) Instructions: Read each problem carefully before you begin. Be certain that you answers are clear and legible: Clearly Circle One Answer Only. Make sure to review you answers before you turn the exam in. Please place your answers on the answer sheet. You should also circle the correct letter for back up purposes. Print your name: ___________________ Sign your name: ___________________ Answer Sheet 1 C 16 A 2 E 17 D 3 B
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