"Chemical Substance" Essays and Research Papers

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Chemical Substance

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...

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Chemical Substance and Local Chemical Recycling

really worried today than 20 years before. Today I will share with all of you about pollution. We could say that pollution is the harm that results because of the presence of a substance or substances where they would not normally be found or because they are present in larger than normal quantities. Polluting substances may occur as a solid, liquid or gas. The pollution could be water, air, sound any many more. So today I will tell about water pollution. In my speech I will divide the session to...

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Pure Substances and Mixtures

constantly moving, the higher it’s temperature, the faster they move. All the particles are attracted to each other. The particles move faster and move further apart when heated, and the reverse when cooled. Each substance has unique particles that are different from the particles of other substances. Particle theory helps to explain the behaviour of materials by showing a model which allows us to All matter are made up picture what is happening inside those materials. Particles in each of the 3 states...

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composition, behavior (or reaction), structure, and properties of matter, as well as the changes it undergoes during chemical reactions.[2] It is a physical science which studies various substances, atoms, molecules, crystals and other aggregates of matter whether in isolation or combination, and which incorporates the concepts of energy and entropy in relation to the spontaneity of chemical processes. Disciplines within chemistry are traditionally grouped by the type of matter being studied or the kind...

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Conservation of Mass Lab

100mL graduated cylinder * 150mL beaker * 400mL beaker * Balance The purpose of this lab was to find the mass of the products and reactants and to show a chemical reaction between them. I will use our results to apply what we’re learning in class which consists of: intensive and extensive properties, physical and chemical change, homogeneous and heterogeneous mixtures and the conservation of mass. Thus, we will learn to utilize these scientific applications outside of the actual experiment...

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Separating the Components of Panacetin

“Panacetin” Observations Most natural products and many commercial preparations are mixtures containing a number of different substances. To obtain a pure compound from such a mixture, you must separate the desired compound from the other components of the mixture by taking advantage of differences in their physical and chemical properties. Acidic or basic substances are often converted to water-soluble salts, which can then be separated from the water-insoluble components of a mixture. In this...

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Rylands V Fletcher

Question 6, April 2006: Solution to fe1 question Bell Computers could attach liability to either Chemical Supply or Industrial Estates under the tort of Rylands v Fletcher. Chemical Supply’s Liability Rylands v Fletcher established that a person who “for his own purposes brings on his lands and collects and keeps there anything likely to do mischief if it escapes, must keep it in at his peril, and if he does not do so , is prima facie answerable for all the damage which is the natural consequence...

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Forensic Toxicology

deaths to drug use, poisonings, and the detection of foreign chemicals and toxins in the human body. The utilization of analytical chemistry and a few chemical tests can tell investigators if the victim was under the influence of any drugs or even poisoned, by studying samples of blood, urine, hair and even bodily fluids. Forensic toxicologists detect and identify the foreign chemicals in the body, the concentration of these chemicals, and link these findings to possible drug overdose, poisoning...

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What Is Toxicology? - Paper

personal opportunity, in large part due to the many ways chemicals have been put to work for us. For example, drugs whose effects range from curing previously fatal bacterial infections, reducing the impact of AIDS, minimizing heart disease, decreasing age- related wrinkles, to reducing hair loss are widely available today. The many benefits of the diverse uses of our natural resources are an outcome of careful scientific research and of using chemicals in an appropriate and safe manner. Toxicologists,...

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study guide for physical science

classify matter. (Homogeneous, Heterogeneous, Mixture, Pure Substance)? HOMOGENEOUS Matter that is made up of the same or alike particles Can’t see what makes it up Looks uniform HETEROGENEOUS Matter that is made up of different types of particles Can see what makes it up Mixture A material made up of two or more substances that can be easily separated Either Heterogeneous or Homogeneous Ex: Salsa, Cake batter, pizza, soda Pure Substance Classification of matter with a fixed composition Only...

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