Current‚ Voltage and Power * Electricity is the flow of electric charge. We can describe the flow of electric charge in several ways. These include the quantities Current‚ Voltage and Power. Current * Current (I) is the rate of flow of Charge Carriers‚ such as electrons. Current is usually thought of as moving in the direction of positive charge‚ so from the positive power supply to the negative. However‚ since in metals it is electrons that carry electric charge‚ the actually flow is opposite
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obtained. INTRODUCTION Proteins are polymers of amino acids. A typical protein may be composed of hundreds of amino acids. They are held in their native or natural confirmations by a combination of forces: hydrogen bonds‚ salt bridges (also called ionic interactions)‚ disulfide bridges‚ and hydrophobic interactions. Changing the conformation of a protein by disrupting these forces is called denaturation (Willbrand‚ n.d.). According to Ophardt (2003)‚ denaturation of proteins involves the disruption
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Polyatomic Ions.table List of Polyatomic Ions that Must be Memorized for General Chemistry Polyatomic Cation: NH4+ ammonium ion Polyatomic Anions Ionic Charge: Oxyanions: ClO4– perchlorate ion ClO3– chlorate ion – ClO2 chlorite ion ClO– hypochlorite ion -1 Ionic Charge: Oxyanions that Contain Hydrogen: HCO3– bicarbonate ion or hydrogen carbonate ion HSO4– bisulfate ion or hydrogen sulfate ion NO3– NO2– nitrate ion nitrite ion MnO4– permanganate ion
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compounds (like oil and grease) with water. Because air is not hydrophilic‚ detergents are also foaming agents to varying degrees. Contents [hide] 1 Chemical classification of detergents 1.1 Anionic detergents 1.2 Cationic detergents 1.3 Non-ionic and zwitterionic detergents 2 Major applications of detergents 2.1 Laundry detergents 2.2 Fuel additives 2.3 Biological Reagent 2.4 Soapless soap 3 See also 4 References 5 External links [edit]Chemical classification of detergents Detergents
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compound and appears to be dry: since an ionic compound (salt) is crystallized from an aqueous solution (water)‚ by heating the hydrate the water is released from ionic structure; therefore it is possible to measure the weight of the ionic compound and calculate its ratio to the liquid in the hydrate. The goal of the lab is to establish the identity of a given hydrate (“wet salt”) by comparing the results with known hydrate percentages. Hydrates are ionic compounds (salts) that have a definite amount
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Final Exam Review Chapter 2 Study Questions 1. Define the following a) element b) compound c) pure substance 2. Classify each of the following as a pure substance or a mixture. For each pure substance‚ indicate whether it is an element or a compound. Which of the mixtures are solutions a) air b) titanium c) oak d) baking soda e) oxygen f) 7-Up g) wine h) carbon monoxide 3. Label each of the following drawings as element‚ compound‚ or mixture (Assume each type of circle
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The Contributions to the Western Civilization Ashley Stewart 5/1/11 Professor Hammond Strayer University The Hebrews‚ Greeks‚ and Romans‚ have made great contributions to develop the Western Civilization. The legacy that they’ve left was religion‚ knowledge‚ and government. The Hebrews contributed the religious aspect‚ the Greeks contributed knowledge and government‚ and the Romans contributed one must have an understanding of the ancient Greek culture‚ or else considered governing
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prepared through double bond decomposition or precipitation method Do you still remember what is meant by double bond decomposition? [please refer to salts notes] General equation double bond decomposition/precipitation; Ionic equation for precipitation reaction. Salt Solubility in water Li+‚ Na+‚ K+‚ NH4+ All salt dissolve in water Nitrate‚ NO3- All nitrate salt dissolve in water Chloride All chloride salt dissolve dissolve in water except; PbCl2 - lead(II)
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likely to be ionic? A. KF B. CCl4 C. CS2 D. CO2 E. ICl 2. Which of these compounds is most likely to be ionic? A. NCl3 B. BaCl2 C. CO D. SO2 E. SF4 3. Which of these compounds is most likely to be covalent? A. Rb2S B. SrCl2 C. CS2 D. CaO E. MgI2 4. Which of these compounds is most likely to be covalent? A. CsOH B. NF3 C. Sr(NO3)2 D. CaO E. LiF 5. The Lewis dot symbol for the chloride ion is A. B. C. D. E. 6. Which of these ionic solids would
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INTRODUCTION: The common ion effect is another example of Le Châtelier ’s Principle in action.The common ion effect tells us that the solubility of an ionic compound is decreased by the addition to the solution of another ionic compound that contains one of the ions involved in the solution It is also responsible for the reduction in solubility of an ionic precipitate when a soluble compound combining one of the ions of the precipitate is added to the solution in equilibrium with the precipitate. It
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