Prehistoric Times - Beginning of the Christian Era (Black Magic) * 1700 BC King Hammurabi’s reign over Babylon In ancient Babylon King Hammmurabbi began to classify metals such as gold ‚ iron‚ and copper. He also gave certain materials higher value than others‚ depending on the potential of the material. Known metals were recorded and listed in conjunction with heavenly bodies. 430 BC Democritus of ancient Greece Democritus and the atom: c.420 BC In the late 5th century BC Democritus
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The Inorganic Chemistry of Carbon Inorganic Carbon For more than 200 years‚ chemists have divided compounds into two categories. Those that were isolated from plants or animals were called organic‚ while those extracted from ores and minerals were inorganic. Organic chemistry is often defined as the chemistry of carbon. But this definition would include calcium carbonate (CaCO3) and graphite‚ which more closely resemble inorganic compounds. We will therefore define organic chemistry as the study
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Chemistry of cosmetics Few people would whip out a chemistry set‚ uncork the vials‚ and slap the compounds on their face. Yet‚ millions of women and girls essentially do that every day when they unzip their makeup bags and apply lipstick‚ mascara‚ and other makeup. Like the compounds in a chemistry set‚ makeup consists of chemicals. Although the chemicals in cosmetic products are intended to improve the appearance of skin‚ lips‚ and lashes‚ some can cause adverse effects. Emulsions The majority
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BIO 120 General Biology I Note-taking/Study Guide Chemistry What is chemistry? Define energy Define potential energy and give an example Define kinetic energy and give an example Define matter Describe the three states of matter? Define elements Define atoms What are the three subatomic particles? What are their charges? Where are they found in the atoms? Define atomic number. Use the periodic table to determine the atomic number of various elements. Define mass number. Use the periodic table
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Polymer Chemistry Classification of Polymers – Notes prepared by The most common way of classifying polymers is to separate them into three groups - thermoplastics‚ thermosets‚ and elastomers5. The thermoplastics can be divided into two types - those that are crystalline and those that are amorphous. You may click on the words in the diagram below to learn more about these classifications. Thermoplastics Molecules in a thermoplastic are held together by relatively weak intermolecular
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Experiment conducted: 05/02/2009 Date Report Written: 08/02/2009 Synthesis of Acetyl salicylic acid (Aspirin) Abstract Introduction: The following report contains information on how to produce aspirin. The experiment has been carried out on a small laboratory scale. The experiment starts by combining such chemicals such as salicylic acid and acetic anhydride. The synthesis of aspirin is classified as an esterification reaction. This is a substitution reaction where the alcohol group from
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A World Without Chemistry A world without chemmistry would be simply disastrous.We would have no phones‚ no lightbulbs‚ no social networking! Almost everything we use in our daily lifes depends on chemistry to exist‚ from the food we eat to the clothes on our backs. If we had never studied chemistry we wouldn’t have liquid oxygen. This was developed in the 1800s and is now probably best-known for its role as rocket fuel. Without rockets the space race wouldn’t have happened‚ or all the everyday
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Chemistry and Society Teresa Miller University of Phoenix CHM 110 September 9‚ 2014 William De Vorick Chemistry is defined as the branch of science that deals with identification of the substances of which matter is composed; the investigation of their properties and the ways in which they interact‚ combine‚ and change; and the use of these processes to form new substances. Chemistry is important to my everyday life and society because everything exists because of chemistry
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Synthesis of Aspirin and Oil of Wintergreen Janelle Alyssa P. Prudente De La Salle University-Dasmariñas Dasmariñas City‚ Cavite‚ Philippines ABSTRACT In this experiment‚ acetylsalicylic acid commonly known as aspirin and methyl salicylate‚ commonly known as oil of wintergreen‚ was synthesized from salicylic acid. This study will show that it is possible to show two very different organic compounds from the same common starting material. For the synthesis of aspirin‚ salicylic acid
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References: Gilbert‚ John C. and Martin‚ Stephen F. Experimental Organic Chemistry: A Miniscale and Microscale Approach. Thomson Brooks/Cole‚ Pacific Grove‚ CA‚ 2006‚ 4th Edition.
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