Classification of Chemical Substances Prepared for: Dr. Robert O’Reilly By: Kudaibergenov Baizak 20.11.2013 Nazarbayev University Introduction While many thousands of substances are known‚ they can be classified into a few simple categories based on type of bonding that exists among the atoms in the substance. Bonds are chemical forces that hold atoms together to form molecules or compounds. These categories are ionic‚ molecular and metallic substances. In ionic compounds valence electrons
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physical chemical properties essay Oakland Schools SCoPE Science Assessment Packet 7th Grade Unit 2 – Physical and Chemical Properties and Changes of Matter Assessment Packet Grade 7‚ Unit 2: Physical and Chemical Properties and Changes of Matter Overview This packet contains a set of assessment resources to be used with the Physical and Chemical Properties and Changes of Matter Unit of the 7th grade Scope Science Curriculum. A test blue print is
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70% of the earth’s surface and contain highly ecological‚ chemical and biological diversity starting from microorganisms to vertebrates. This diversity has been the source of unique chemical compounds‚ which hold tremendous pharmaceutical potential. New trends in drug discovery from natural sources emphasize on investigation of the marine ecosystem to explore numerous complex and novel chemical entities. Among the first bioactive compounds from marine sources‚ spongouridine and spongothymidine from
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chem FATHER AGNEL SCHOOL CLASS IX SUB : CHEMISTRY Matter In Our Sorroundings 1. Define matter. 2. What are the characteristics of matter? 3. What do you mean by the following terms: a. Evaporation b. Sublimation c. Condensation d. Latent Heat of Fusion e. Latent Heat of vaporisation. f. . Melting point g. Boiling point 4. Why do gases diffuse rapidly? 5. Write the relationship
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is chemical change? Chemical change is the alteration of a substance into one or more different substances with different properties (also called chemical reaction). The four different types of chemial reations are synthesis‚ decomposition‚ single displacement‚ and double displacement. Synthesis is when atoms and/or molecules combine to form larger molecules. Decomposition is when a large molecules are split into elements or smaller molecules. Single Displacement has an element and a compound as
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Abstract Chemical equilibrium occurs when a reversible reaction is happening forward and backward‚ at the same time by the same amount‚ is equal. Two procedures were made. First is the Effect of Concentration on Equilibrium. The solution became orange when it was diluted with ammonium hydroxide and the solution became yellow when water was added to the solution. In the second‚ Effect of Temperature on Equilibrium‚ the solution turned into a light brown gas when it was placed in the refrigerator
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Antioxidants November 23‚ 2012 Organic chemistry is the study of structure‚ properties and the reactions dealing with carbon compounds (organic chemistry‚ n.d.). This type of chemistry may deal with small items‚ but knowing how organic chemistry works as a whole has an impact on our daily lives and also the occupations some of us consider. Knowing the bases of organic chemistry can be important and sometimes even required to learn for the bases of many health care professions
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Napoleon’s Buttons 1. The motivation behind each endeavor’s goals could have been the use for good‚ wealth‚ money‚ or prosperity. The chemistry of the compound is related to their usage and motive for obtaining them because molecules can control the trade and use of one specific area of the world. Some major molecules that were valued are phenol‚ isoprene‚ silk‚ cellulose‚ and glucose. Phenols were used as antiseptics during surgery to prevent cuts and wounds from getting infected. Isoprene
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methods in manufacturing. These investigations‚ which are based on 2‚500 employees‚ whose blood was tested periodically‚ yield some minor diagnostic material. The hazards of the dye industry are those connected with any industry plus the poisonous chemicals necessarily handled in the production of dye stuffs. Prior to 1917 the making of aniline products in this country for use as dye stuffs amounted to next to nothing. Our company had‚ however‚ been making aniline products since 1907‚ and in no inconsiderable
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Empirical Formula Lab Class: Chemistry 1405 Fall 2013 Aim: The aim of this Lab Exercise is to use the mass of a chemical and use that mass to find the amount of moles of the final product you can get using the empirical formula. Introduction: The empirical formula of a compound is the simplest whole-number ratio of the elements in the compound‚ which as you will discover‚ is a ratio of the moles of those elements. “Empirical” also means “experimentally determined”. In this experiment
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