in ite‚ ate‚ ide‚ etc. A pure substance is usually solid. Under that it is then classified as an element or a compound. How do you know if it’s an element? Well look at the periodic table of elements if its on there then it’s an element. How do you know if its a compound? Well a compound is made up of two or more elements. So look at the name for example NH3 then it is a compound because it has a nitrogen molecule and 3 hydrogen molecules. Science changes everyday and without our current
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Science can create a mystery where an impossible waste can create intoxicating scent creating own signature perfume using the most exotic and mysterious essential and fragrance oils. Perfume Perfume is a mixture of fragrant essential oils and aroma compounds‚ fixatives‚ and solvents used to give the human body‚ animals‚ objects‚ and living spaces a pleasant scent. Describing a perfume The precise formulae of commercial perfumes are kept secret. Even if they were widely published‚ they would be dominated
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DETERMINATION OF THE WATER OF CRYSTALLISATION April 4‚ 2012 OBJECTIVE: Chemical compounds that contain discrete water molecules as part of their crystalline structure are called hydrates. Hydrates occur quite commonly among chemical substances‚ especially among ionic substances. More often than not‚ such compounds are either prepared in‚ or are recrystallized from‚ aqueous solutions. Hydrates exist for ionic compounds most commonly‚ but hydrates of polar and non polar covalent molecules are also known
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Experiment 21: Reaction of some Akyl Halides Completed on November 13‚ 2012 Purpose The purpose of this experiment was to examine reactiveness of 10 organic compounds under both SN1 and SN2 conditions. Table of Chemicals Compound Structure Molecular Weight (g/ml) Boiling Point (°C) Melting Point (°C) Density (g/ml) Safety 1-bromobutane 137.03 102 -112 1.269 Flammable‚ irritant 2-chloro-2-methylpropane 92.57 51 -26 0.89 Flammable‚ irritant acetone 58.08 56.5 -95 0.793 flammable
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to breath. B. Water or more popular with H2O use to bath‚ drink and cook. II. According to article of Everyday Chemistry in the World around Us‚ our body contains a chemical compound which is combination of element. III. I will explain about important of chemistry in heatlth‚ food and clothes. Body I. Chemistry compound usually use to prepare a food or to make a food more tasted. A. As explain in the 2010 The Society of Flavour Chemist‚ to prepare a quality of food‚ process in making a food
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Bisulfite‚ and Iodoform tests. Also‚ a 2‚4-dinitrophenylhydrazone derivative synthesis reaction will be completed from which a melting point will be obtained. The chemical test results and the melting point analysis will be compared to the table of compounds given to find the unknown’s identity1. Experimental An unknown substance labeled Unknown 2 was obtained. Solubility test: Water (1 ml) was added to a test tube‚ and then the unknown (2-3 drops) were also added to the test tube. A pipet was
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of varying degrees of severity (Markel‚ 2004‚ 6th ed). Susan found that a compound in the insulation could have affected those technicians. Without knowing what that compound was it would take weeks maybe months for them to know if the long-term exposure in houses and offices would seriously affect consumer health. Susan went to the vice president of operations with this information to suggest that they find out if a compound in the insulation caused respiratory problems. He told Susan there is no
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Identification of Unknown Organic Compound by Melting Point (M.P)‚ Boiling Point (B.P) and Infrared Spectroscopy Methods and Background The main objective of this lab is to identify the given unknown organic compounds with various methods. Identification of an unknown compound is important to perform through the process of melting point (M.P)‚ boiling point (B.P) and Infrared spectroscopy (I.R). Index of Hydrogen deficiency (IHD) and elemental analysis makes an experiment more efficient in
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carbonyl compounds is useful in reactions because nitriles are versatile functional groups1. Not only are they versatile functional groups but they serve as precursors in several transformations. The cyano-group is found in many bioactive molecules and plays a role in hydrogen bonding to certain biological receptors.4 Nitriles are carboxylic acid derivatives because they can easily be converted to carboxylic acid under either basic or acidic conditions. Piperonal is an aromatic compound that is present
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Lab Two; Chromatography of Food Dyes Jan Konig 28.04.2013 11:00am Chemistry 121‚ section DE Abstract: The second lab deals with the chromatography of food dyes which means you figure out what kind of compounds are used in a product like food color etc. by comparing the result to FD&C Food Dyes. You use six different food dyes‚ four food colors out of the store‚ two different Kool Aid powder and four different colors of candy like M&Ms you use for the chromatograph. At the end you try
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