Thesis: According to psychologists and sleep experts‚ poor and insufficient sleep can have dramatically negative impacts on a students’ daily functioning particularly their school performances‚ which may include off-task behavior‚ drowsiness‚ irritability and students’ inability to focus so adolescents should be sleeping at least 8 hours a day in order to function at their mental best. Sleep Disordered Breathing And Daytime Sleepiness Are Associated With Poor Academic Performance In Teenagers. (NCBI)
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The purpose of the making alum from aluminum lab was to create alum from a series of chemical reactions involving aluminum. Small pieces of an aluminum can were cut and measured before being taken through a series of chemical reactions. This process involved filtering out waste product that was no longer needed in the reaction by using Whatman #4 filter paper and an aspirator. The first reaction that took place was placing aluminum pieces into the strong base NaOH and then heating it. This reaction
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Department of Education Region III – Central Luzon Division of Tarlac Province SAN ROQUE NATIONAL HIGH SCHOOL Bamban‚ Tarlac S.Y. 2014 – 2015 INVESTIGATORY PROJECT TAWAS USED AS TOOTHPASTE AND MOUTHWASH Chapter 1 *Introduction* • TAWAS or ALUM refers to a chemical compound‚ whose name is often given as potassium aluminum sulfate. • It is a crystalline substance that can be colorless or white. • Filipinos use tawas in doing laundry and in whitening their armpits. This Investigatory
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The Formation of Alum Crystals from Solutions in Two Different Thermal Conditions Burce P.J.‚ Cachuela J.A.A.‚ Capistrano M.M. I. Objectives The experiment aims to describe crystals and its aggregates by creating crystals of Alum (AlK (SO4)2 ∙12H2O)‚ commonly known as Tawas‚ from solution. Two setups will be created; crystals from each setup will be allowed to form at two different thermal conditions. With this‚ the experiment also aims to describe how temperature affects the formation of
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Literature Survey 2. Literature Survey Literature survey indicated 135 possible routes for the synthesis of 2-Aminobiphenyl. It must be noted that all routes available were lab-scale and no patents for the desired compound were available. Also‚ majority of these synthesis routes gave extremely low yields of our desired product and produced a number of other by-products in higher yields. Therefore‚ only the pathways giving significant yields of the desired product have been listed below. i. Suzuki
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Organic Lab 2 February 14‚ 2009 Experiment 4: Borohydride Reduction of 2-Methylcyclohexanone Introduction: When learning about reduction reactions‚ we know that the addition of nucleophilic hydride anion (H-) to the carbonyl group will in turn result in the reduction of aldehydes to primary alcohols. Borohydride‚ and Lithuim aluminum hydride are commonly used as reducing agents. We can note that both of these reagents have a (H-) anion‚ hence it will be a powerful base and also take the
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an effective motivator. The Kal Kan “18 year-old-grandpa” ad targets loving pet owners‚ using nostalgia‚ storytelling‚ and music to make an emotional appeal. In hard times‚ advertisers look to comfort their consumers‚ and entice them to depend on their brand. One writer proposes “More often than not‚ the technique they chose to create such comfort was through nostalgic advertising (Boyle‚ as cited in Merchant‚ A.‚ Latour‚ K.‚ Ford‚ J.B.‚ & Latour‚ M.S.‚ 2013). The Kal Kan ad appeals to pet owners
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World War 2 - Synthesis Essay World War Two was a very eventful war. With the rise of Nazi Germany; Countries were forced to take action leading up to the certain events that would be forever recorded in history. There were many events that happened throughout‚ but the overall most important event was the dropping of the atomic bombs on both Hiroshima and Nagasaki‚ Japan. There were many historical articles that explained with great detail the tragedy and devastation of the dropping of the bombs
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the actual yield was 18.287g. This gives a percent yield of 100.699%. Evidence/ Reasoning: By looking at the overall reaction involved in the lab‚ we can see that two moles of Aluminum are needed to react in the reaction‚ producing 2 moles of KAl(SO4)2 ·12H2O. This lets us know that however many moles of Aluminum there are in the original sample will be equal to
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Analysis of Alum‚ AlK(SO₄)₂ •12H₂O Purpose The purpose of the experiment is to confirm whether the compound is Alum. Introduction Percent composition is defined as part divided by whole multiplied by 100. Water of hydrogen is defined as the amount of water produced into a molecule prepared in an aqueous solution. Molecular formula indicates the actual numbers and type of atoms in a molecule (notes). Procedure The procedure in this experiment is to determine melting point and mole ratio of
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