Rule • 4.9 The Lengths and Strengths of Covalent Bonds © 2014 W. W. Norton Co.‚ Inc. 1 Chemical Bonds All chemical bonds consist of _______ that hold groups of atoms together and make them function as a unit. A bond will form if the energy of the aggregate is ______than that of the separated atoms. ____________ – energy required to break a chemical bond Bonding involves ________________. 2 Chemical Bonds‚ cont. In general‚ there are three types of chemical bonds: I. Ionic
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Formal Report no. 1 Synthesis of Aspirin Chemical Principles Aspirin is most widely sold over-the-counter drug. It has the ability to reduce fever (an antipyretic)‚ to reduce pain (an analgesic)‚ and to reduce swelling‚ soreness‚ and redness (an anti-inflammatory agent). Much of this is believed to be due to decreased production of prostaglandins and thromboxanes. Aspirin’s ability to suppress the production of prostaglandins and thromboxanes is due to its irreversible inactivation of the cyclooxygenase (COX)
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Synthesis of Aspirin Learning Goals 1. To synthesize aspirin from salicylic acid and acetic anhydride. 2. To purify the crude product by Recrystallization. Introduction Most drugs are chemical compounds which are described as "organic compounds" because they are comprised primarily of the elements carbon‚ hydrogen and oxygen. The present experiment will be the synthesis of a familiar organic compound called aspirin. The common chemical name is acetylsalicylic acid. Aspirin‚ the
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CHEMISTRY OF NATURAL PRODUCTS Terpenoids Sameena Bano Department of Chemistry Faculty of Science Jamia Hamdard New Delhi-110062 (24.09.2007) CONTENTS Introduction Classification of Terpenoids Isolation of mono and sesquiterpenoids General properties of Terpenoids General methods of structure elucidation Terpenoids Citral Menthol Camphor Eugenol Keywords Terpenes‚ isoprene‚ citral‚ menthol‚ camphor and eugenol 1 Introduction There are many different classes of naturally occurring
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The Trans-Atlantic Slave Trade The Trans-Atlantic slave trade was a transportation of mostly West African slaves over a period of three and a half centuries across the Atlantic Ocean to America and Europe. An estimated twelve million men‚ women‚ and children were taken from their African homelands to be used as slaves. The slave trade provided a great labour force for America and both the United States
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EXTRACTION Organic Chemistry Laboratory This experiment was conducted in order to compare single and multiple extraction of caffeine from dried tea leaves and to calculate the percentage yield of caffeine for both extraction procedures. The group was assigned to do the multiple extraction. Before the extraction proper‚ the water bath containing the anhydrous sodium carbonate and distilled water was heated. As the sodium carbonate dissolves‚ tea leaves were added in the mixture and allowed to
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Class Review for Test # 1 Multiple Choice Questions 1) What sociological phrase is used to describe "opening a window onto unfamiliar worlds" and "offering a fresh look at familiar worlds"? A) the sociological perspective B) the social imperative C) social integration D) social location 2) To be classified as a society‚ what are the two key qualities a group of people must share? A) a common language and a common religion B) a common culture and a territory C) a territory
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the probe were held away from each other in the dissolved form of the substance and if the light flashed on‚ then the substance conducted electricity when dissolved. I think substance 1 is a covalent compound. This is because it had a low melting point during the melting point test. Substance 2 might be a metallic compound because it had a high melting point but also low solubility in water. I think substance 3 is an ionic compound because it had a high melting point and solubility in water
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Trans Women: A Population of Unrecognized Beauty For the first time in this woman’s life‚ she was coming face to face with a transgender woman. Her first inclination was to see the appearance of an amplified woman‚ with frilly clothing‚ glittery shoes‚ makeup galore‚ and long‚ beautiful hair. A walking Barbie doll‚ with a twist. To her dismay‚ she was entirely wrong‚ misguided by society and the media. It is not uncommon to witness uneducated individuals be completely led astray‚ due to their reliance
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Food Chemistry: Option F Food Groups: F.1 Food & Nutrients Food: any substance‚ whether processed‚ semi-processed or raw‚ which is intended for human consumption‚ and includes drinks‚ chewing gum and any substance which has been used in the manufacture‚ preparation or treatment of “food” but does not include cosmetics or tobacco or substances used only as drugs. Nutrients: any substance obtained from food and used by the body to provide energy‚ to regulate growth‚ and to maintain and repair
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