Statement of the problem. What are the other alternatives that we can do on that banana peels aside from making it as fertilizer? C. Scope and Delimitation Base on our knowledge‚ the magnesium and potassium that are on the table of elements‚ gives vitamins on our tooth. We think that if potassium and magnesium gives vitamins on our tooth‚ it is possible that it can whiten our tooth D. Significance of the study The Benefits of the banana peel to whiten our teeth is to make some people save more
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the test tube is like a light yellow but on the bottom of the test tube the yellow is darker. 3. Magnesium metal and hydrochloric acid solution Place one scoop of magnesium turnings into the test tube. Add hydrochloric acid slowly and observe the reaction. Next‚ place a burning splint near the mouth of the test tube to test for the presence of hydrogen gas. Observations when its put the magnesium metal and the hydrochloric acid solution it look like many bubbles Observacion: cuando se pone
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to cause an increase in cancer to people who use this product‚ with an emphasis on women with breast cancer. PEG compounds usually have small amounts of a substance called ethylene oxide. According to experimental results reported in the National Toxicology Program ’s Eighth Annual Report on Carcinogens‚ ethylene oxide increases the incidences of uterine and breast cancers and of leukemia and brain cancer. ` Another ingredient used in cosmetics is Methylchloroisothiazolinone‚ which is a natural
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function as a nucleophile; it can operate as a base too by reacting with water to form an alkane. Example: CH3CH2MgBr + H2O CH3CH3 + Mg(OH)Br Based on the diagonal relationship in the Periodic Table‚ lithium can be used as a substitute for magnesium. This class of organometallic compounds are called Gilman reagents. For
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CO2(s) C(s) + 2MgO(s) Magnesium is a stable element and reacted violently with the liberation of much heat through combustion. The magnesium ribbon burned inside the dry ice (CO2(s)) mainly because it combined with oxygen in CO2 thus leaving elemental carbon behind. The Mg ribbon burned in air resulted to the formation of the white product (MgO) while the rest of the Magnesium ribbon that burned between the two slabs of dry ice resulted to a black product (C(s)). The Magnesium had been oxidized and
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UNIVERSITY OF CAMBRIDGE INTERNATIONAL EXAMINATIONS International General Certificate of Secondary Education *4308315385* CHEMISTRY Paper 2 Candidates answer on the Question Paper. No Additional Materials are required. READ THESE INSTRUCTIONS FIRST Write your Centre number‚ candidate number and name in the spaces at the top of this page. Write in dark blue or black pen. You may need to use a pencil for any diagrams‚ graphs or rough working. Do not use staples‚ paper clips‚ highlighters‚ glue or correction
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Water is to be considered “hard” if it contains unusually high levels of dissolved magnesium‚ and calcium ions. This can be an issue for some people because hard water reacts with soap and it forms an insoluble salt or curds‚ which then in turn may leave your clothing looking yellow. Hard water can be softened by filtering your water through a household water softener to remove some of the excess magnesium
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w w w e tr .X m eP UNIVERSITY OF CAMBRIDGE INTERNATIONAL EXAMINATIONS GCE Ordinary Level e ap .c rs om MARK SCHEME for the May/June 2011 question paper for the guidance of teachers 5070 CHEMISTRY 5070/21 Paper 2 (Theory)‚ maximum raw mark 75 This mark scheme is published as an aid to teachers and candidates‚ to indicate the requirements of the examination. It shows the basis on which Examiners were instructed to award marks. It does not indicate the details of the discussions that
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Concentration of Acid Reaction Time (s) Reaction Rate (g Mg/s) 0.5M 480s 2.5 x 10^5 g Mg/s 1.0M 120s 9.8 x 10^5 g Mg/s 3.0M 25s 4.7 x 10^4 g Mg/s 6.0M 11s 1.1 x 10^3 g Mg/s Table 2: Effect of Surface Area on Reaction Rate Shape of Magnesium Strip Reaction Time (s) Reaction Rate (g Mg/s) Test Tube A sliver 117s 1.0 x 10^4 g Mg/s Test Tube B rolled 118s 1.0 x 10^4 g Mg/s Test Tube C flat 101s 1.2 x 10^4 g Mg/s Table 3: Effect of Temperature on Reaction Rate.
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per wafer UMC‚ http://www.umc.com.tw/english/process/a.asp MOSFET fabrication Metal-oxide-semiconductor field-effect transistor (MOSFET) Technology size: Distance between drain & source Robert F. Pierret‚ Field Effect Devices‚ p.72 MOSFET fabrication http://www.ecse.rpi.edu/~schubert/Course-ECSE-6290%20SDM-2/1%20MOSFET-2%20Fabrication.pdf Top view Field oxide Source Drain Channel length Safety Safety Issues • Variety of acids and bases
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