class. The other characteristics that will be looked at will be the boiling point‚ refracted index‚ and the density of the liquid. Methods / Data The physical properties of the liquid unknown were examined first. The color of the substance was clear yellow. The chemical also produced a foul smell when the lid of it was opened. Usually foul smells
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Observations of Chemical and Physical Changes Derrick Davis Lab partner: None Location: My house Date Performed 25 Feb 15; 1600 CHE111-CO2 Photo 1 (Photo of me properly wearing safety goggles holding the student information card) Abstract: In chemistry it is important to understand the difference between physical and chemical changes. The objective of this experiment was to perform tests using heat or chemical mediators and observe the results for any physical or chemical changes. Various
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McDonald 1 Chemical and Biological Weapons: World at War Matthew McDonald Mrs. Jones English I 4 March 2015 McDonald 2 Chemical and Biological Weapons: World at War THESIS STATEMENT: Chemical and biological weapons are necessary because they strike fear in the enemies‚ effective in their power‚ and can be used as population control. I. Introduction A. Background Information B. Thesis Statement II. Strike fear into your enemies A. Fear of retaliation
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Classifying Chemical Reactions Introduction Pre-lab questions 1. Which reactants used in this experiment are flammable? Discuss the safety precautions that are necessary when working with flammable materials in the lab? 2. Summarize the following description of a chemical reaction in the form of a balanced chemical equation? 3. Common observations of a chemical reaction are described in the introduction section. For each observation‚ name a common or everyday occurrence that must involve a chemical reaction
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Appendix B: Methodology GridIndicated Ratings Appendix C: Observations and Outliers for Grid Mapping Appendix D: Chemical Industry Overview Appendix E: Key Rating Issues over the Intermediate Term 1 3 5 8 Corporate Finance December 2009 Moody’s Global Global Chemical Industry Summary This rating methodology explains Moody’s approach to assessing credit risk for global chemical companies. This document replaces a previous publication from February 2006. The grid for the rating methodology
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2007 - 2011‚ and addresses the phenomena of adolescent substance abuse in the African American demographic. Additionally‚ this literature review will address documented causes of adolescent substance abuse as presented by psychologists‚ psychiatrists‚ educators‚ government officials‚ urban-policy researchers‚ addiction counselors and human service professionals. Opposing views will be presented by various experts on the subject of substance abuse among the African American adolescent population
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Breaking up is hard to do – Separating Sand & Salt Purpose: The purpose of this experiment is to separate a mixture of sand and salt. Materials: Small beaker Electric balance Sand Salt Water Graduated cylinder Stirring rod Filter paper Flask Rubber policeman Wash bottle Funnel Bunsen burner complete with rubber tubing and a source of gas Hot hands Insulator pad Ring stand complete with a ring Wire gauze Striker Pre-lab Questions: 1. Water will be useful in separating the salt and sand because
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School Introduction Ever since the first synthetic detergents were developed following World War I‚ chemical detergent has become a household necessity. There are various types of laundry detergents.However‚ most of them cause severe harm to the environment‚ as well as human beings. According to Stumm‚ W (1985)‚ soaps and detergents belong to the category of mass-produced chemical substances. Worldwide‚ the thirty million tons produced each year pose substantial potential for harm to the aquatic
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Introduction The reaction rate of a chemical reaction is determined as the change in the concentration of a reactant or product over the change in time. [1] The rate of a reaction is determined by experiment. Many factors influence the rate of a reaction: the nature of the reaction‚ concentration‚ pressure‚ temperature‚ and surface area‚ presence of catalyst and intensity of light. [2] For a chemical reaction‚ the rate law or rate equation is a mathematical expressed equation that links the reaction
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involves the study of: 1. THE CHEMICAL INDUSTRY 2. CHEMICAL EQUILIBRIUM 3. PRODUCTION OF SULFURIC ACID 4. PRODUCTION OF SODIUM HYDROXIDE 5. SOAP & DETERGENTS 6. THE SOLVAY PROCESS FOR Na2CO3 ...all in the context of the applications of Chemistry in human society. 1. THE CHEMICAL INDUSTRY The “Invisible” Industry Most people are familiar with some aspects of the production and manufacture of the many goods we need and use every day‚ but do not understand the vast chemical industry which underlies it
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