Experiment #17 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.
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OUTLINE Thesis Statement: There are many common plants that contain medicinal properties that also explore information on treatment‚ health benefits & side effects. Guide Questions: 1. What are the common plants with medicinal properties? 2. What are the common medicinal properties that these plants contain? 3. What are the benefits and risks brought about by these medicinal properties of plants? 4. What are the side effects in taking up medicinal plants? Are there any
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Balancing chemical equations 1. Complete the following sentences‚ using the words or groups of words in the box below. You may use some words more than once. |• as small as possible |• decrease |• molecules |• quantities | |• balance |• different |• nature |• rearranging | |• bonds |• equal
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Introduction Risk assessment and physical security survey of any building is critical in order minimize to the venerability of being put to risk due to failure to install or put the necessary mechanism to curb such potential. There is a need for thorough analysis on the risk assessment and physical survey on implementation of practices‚ principles and procedures in installation security measures. Definition a) Risk The term risk refers to the possible happening of undesirable event
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Chemical Separation Introduction: The objective of this experiment was to extract the pigments from spinach leaves‚ perform Thin Layer Chromatography (TLC) on the spinach leaf extract‚ and then determine the best solvent mixture to use to separate the pigments in the extract. The pigments are located inside the chloroplast walls in the cells of the spinach leaves. In order to obtain the pigments the cell walls must be broken down thus exposing the pigment containing chloroplasts. Upon
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Medicinal Plants and Anti-oxidant Properties. An antioxidant can be defined as “any substance that‚ when present in low concentrations compared to that of an oxidisable substrate‚ significantly delays or inhibits the oxidation of that substrate” (Young and Woodside‚ 2001). It is well known that oxidant by-products of normal metabolism such as free radicals and reactive oxygen species (ROS) in excess can cause extensive damage to DNA‚ proteins‚ and lipids. Under stress‚ the body produces more ROS
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I did this lab to find out the differences between chemical and physical changes. I also did this lab to learn the signs that would indicate the chemical reactions and physical changes. I needed to learn the odor change‚ color change‚ bubbles or gas‚ irreversible‚ temperature changes and finger prints. By the end of the lab‚ my goal was to be able to didtinguish easily the difference between chemical and physical changes. Question #1 answer. 1. Gas. 2. Dissolved in water. 3
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used to do useful things such as propel an automobile or a 747. The principles of thermodynamics govern the conversion of thermal energy to other‚ more useful forms. For example‚ an automobile engine can be though of as a device which first converts chemical energy stored in fuel and oxygen molecules into thermal energy by combustion‚ and then extracts part of that thermal energy to perform the work necessary to propel the car forward‚ overcoming friction. Thermodynamics is critical to all steps in this
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Question 1 How much business risk does AHP face? How much financial risk would AHP face at each of the proposed levels of debt shown in case Exhibit 3? Answer these questions by computing and evaluating the asset beta and the equity beta. To start with‚ we have to state the difference between business risk and financial risk. Business risk represents the risk of the firm’s assets when no debt is used. It is then the risk that is inherent to the firm’s operations. This risk is represented by
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The Chemical Basis of Life Chapter Objectives Opening Essay Explain why an understanding of chemistry and the properties of water are important aspects of biology. Elements‚ Atoms‚ and Compounds 2.1 Define matter‚ an element‚ a compound‚ and a trace element. 2.2 Explain how and why iodine‚ fluoride‚ and iron are added to the human diet. 2.3 Distinguish between the size‚ location‚ and properties of protons‚ electrons‚ and neutrons. 2.3 Define the atomic number and mass number of an atom
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