Metals and alloys. Hume-Rothery rules. 1. Three types of metals. 2. Alloys. Hume-Rothery rules. 3. Electrical resistance of metallic alloys. 4. Applications of metallic alloys. 5. Steels. Super alloys. 6. Electromigration in thin wires. Three types of metals Metals share common features that define them as a separate class of materials: • Good thermal and electrical conductors (Why?). • Electrical resistance increases with temperature (Why?). • Specific heat grows linearly with temperature
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Guide Questions Experiment 1 Calibration of the calorimeter: 1. Give the net ionic thermochemical equation of the reaction used to calibrate the calorimeter. a. Is the reaction endothermic or exothermic? b. Which is the limiting reactant? c. How much (in moles) limiting reactant was used? d. How much heat was generated (or absorbed) by the reaction? 2. Relate the sign of the ΔT to the ΔH of the reaction used for calibration. 3. What is the heat capacity of the calorimeter? Relate
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Protein Hydrolysis and Characterization Group 7 Niez‚ Robert Francis‚ *Orbin‚ Alfonso Ricardo* Parro‚ Athena Emmanuelle Peralta‚ Christian Department of Biological Sciences‚ University of Santo Tomas‚ Manila‚ Philippines • Abstract Hydrolyzed Protein is protein that has been hydrolyzed or broken down into its component amino acids. While there are many means of achieving this‚ two of the most common are prolonged boiling in a strong acid (acid-HVP) or strong base or using an enzyme such
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solved. 1. A penny minted after 1982 is composed of copper and zinc only. If a penny has a mass of 2.507 g and is 2.50 % copper. What is the mass of zinc in the coin? (5 pts) 2.507 g x 2.50/100 = 0.062675 g of Cu 2.507 g of penny - 0.062675 g of Cu = 2.444325 g = 2.444 g of Zn (2.44 g of Zn is correct also) D. Density is a very important concept for chemist. The density of a substance can be obtained in a chemistry laboratory. 1. A rubber stopper with a mass of 23.75 g is dropped in a 50-mL graduated
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Zinc Tris-thiourea Sulfate (ZTS) is a Semi Organic Nonlinear Optical (NLO) material which finds applications in the area of laser technology‚ optical communication‚ data storage technology‚ and optical computing etc. The author has successfully grown ZTS crystal by gel method. Gel technique has been adopted at ambient temperature to attain better result. The grown crystals were transparent and colourless. The crystal size has been obtained the range about 5mm X 3mm X 2mm. Thermal study of ZTS crystal
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Naming Chemical Compounds PART A Name the following 1 S Sulfur 2 Sb Antimony 3 N2 Dinitrogen 4 PO43- Phosphate 5 Au Gold 6 Rb Rubidium 7 LiCl Lithium Cloride 8 AlBr3 Aluminum (III) Bromide 9 KMnO4 Potassium Manganate (VII) 10 Cu(OH)2 Copper (II) Hydroxide 11 FeSO4 Iron (II) Sulfate 12 NH4Cl Ammonium Chloride 13 ZnCO3 Zinc Carbonate 14 SnF2 Tin (II)Fluoride 15 MgSO4 Magnesium Sulfate 16 MnO2 Manganese (IV) Oxide 17 Ca3(PO4)2 Tricalcium Phosphate 18 NaOH Sodium Hydroxide
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CATHODIC PROTECTION P E FRANCIS CONTENTS 1 2 3 INTRODUCTION............................................................................................................2 PRINCIPLES OF CATHODIC PROTECTION..........................................................3 METHODS OF APPLYING CATHODIC PROTECTION........................................5 3.1 3.2 4 4.1 4.2 4.3 4.4 4.5 4.6 4.7 IMPRESSED CURRENT..........................................................................................5 SACRIFICIAL
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chất ô nhiễm của thực vật thủy sinh tăng (hay giảm) bởi sự xáo trộn sinh học (bioturbation) do hoạt động của các động vật đáy không xương sống?‚ Oligochetes tubificidae‚ một trong những dạng động vật không xương phổ biến‚ đã được sử dụng như một công cụ sinh thái và là nguồn gây xáo trộn sinh học. Sự phục hồi sinh học của trầm tích do hoạt động của những loại động vật này sẽ được định lượng bởi luminophore‚ một chất chỉ thị hòa tan‚ dạng hạt trơ. Typha latifolia‚ một trong những loài thực vật thủy
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changes during this experiment. What evidence did you use to decide that something was a chemical change? Give at least two examples of chemical changes you observed. In CuCo3 reacting with HCl‚ which released a light green gas and produced bubbles. Cu(NO3)2 changed to a green and yellow color‚ and NaCl mixed with HCl changed to hold a slightly yellow tint. CuCo3 with NaOH changed to a darker color‚ also irreversible. These are all signs that a chemical change occurred. Classify the following properties
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PRUEBAS DE IDENTIFICACION DE NITRITOS Y NITRATOS EN SOLUCION ACUOSA RESUMEN. Dentro del desarrollo de este tema encontramos primero la descripción de las propiedades del ion nitrito‚ el cual esta formado por un átomo de N y dos de O con una carga de -1‚ por consecuencia tiene una geometría angular; dentro de la propiedades útiles para su identificación tenemos que es un ion soluble en agua‚ es incoloro y puede actuar como oxidante o reductor. Forma complejos ya sea por parte de el átomo de
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