Percent Mass of Copper in a Penny Introduction The purpose of this lab is to determine the percent mass of Cu in a penny and see if the fabricator that makes the planchets for the government is using the correct amounts of Cu in the pennies. The composition of a standard penny is 97.5% Zn and 2.5% Cu. In the lab we will be using Beer’s Law (A=elc+b where A is solution absorbance‚ e is a constant called molar absorbency‚ l is the length in cm‚ and c is the concentration). Using Beer’s Law in this
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Exemple de probleme rezolvate pentru cursul 11 DEEA Amplificatoare de tensiune cu AO Extinderea regiunii liniare de funcţionare prin introducerea unei reacţii negative în circuit Problema 1 Un amplificator operaţional AO este alimentat de la 2 surse de tensiune continuă‚ VCC = 11[V] si VEE = -11[V] si are o amplificare in tensiune AVAO=100000. a. Să se determine intervalul de valori al tensiunii de intrare diferenţiale vID în care AOul funcţionează în regiunea liniară. b. Dacă AOul se introduce
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placed into a solution of its own ions an equilibrium is set up. Cu Zn Zn2+(aq) Zn2+(aq) + 2e Zn(s) Cu2+(aq) Cu2+(aq) + 2e− Cu (s) You will recognise the half equations – the diagrams show the half cells. NB: In this work‚ half equations are always shown with electrons on the left. If these two half cells are connected then the same reaction takes place as when a piece of zinc is put into a copper solution: wire Zn salt bridge Cu Redox – revision When a piece of zinc is placed in a copper
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Lucian Blaga (1805- 1961) • 1919 – a debutat cu voumul “Poemele luminii” • tematica liricii : dragostea (“Dorul”)‚ natura (“Vara”)‚ reincarnarea(“La mare”)‚ arta potica (“Eu nu strivesc corola de minuni a lumii”)‚ poezia gnomica (“Cantare vantului”). Acest poem este inclus in volumul”Lauda somnului” Anul 1929 “Biografie” de Lucian Blaga Unde si cand m-am
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I. Title: Iron-Copper (II) Chloride Reaction II. Purpose: The purpose of this lab is to see how iron reacts with a copper (II) chloride solution. III. Equipment and Reagents Scoop copper (II) chloride (CuCl2) Beaker Iron (Fe) Wash Bottle water (H2O) Scale Hydrogen chloride (M HCl) Filter Paper IV. Procedure: 1. Obtain a clean‚ dry 250 mL beaker. 2. See teacher to obtain a scoop of CuCl2 in the beaker. 3. Add approximately 50 mL of tap water to
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the Mayflower was anchored off Provincetown Harbor? (Remember‚ use complete sentences please): While the men whereon shore exploring Williams young wife‚ Dorothy Bradford‚ fell over board and drowned. Journal entry: Pirate. May‚ year of no lord 1646 Aigh‚ our ship be now anchored off thee coast of Plymouth. This brings distaste to me tongue as nothing is there I abhor more than the smugness of a puritan. Let rain down upon them our demiculverins ‚ that we may dance upon their burned colony
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Ȭ Ȭ ȱ ǻ Ǽȱ COCHIN UNIVERSITY OF SCIENCE AND TECHNOLOGY MCA MINI SEMESTER PROJECT REPORT ON “COLLEGE-TIME-TABLE” SUBMITTED BY:Kavita kumari jethwani Reg_No:- 95580018 D epartm ent of Com puter A pplications‚ CU SA T pg. 1 Ȭ Ȭ ȱ ǻ Ǽȱ CERTIFICATE COCHIN UNIVERSITY OF SCIENCE AND TECHNOLOGY COCHIN-22 This is to certify that the project report entitled “College Time Table” is a bonafide record of the
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Co(acac)3 is not stable in HNO3‚ Cu(NO3)2 and acetic anhydride are used in this reaction to produce the final product‚ Co(acac·NO2)3. The exact mechanism of the reaction is unknown‚ however‚ it is believed to proceed as follows: 1) [pic] 2) [pic] Data and Calculations Table 1: Measurements of weights and melting point | |Weight (in grams) |MP (°C) | |Cu(NO3)2·3H2O
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Exploiting Semantic Web Technologies for Recommender Systems A Multi View Recommendation Engine Houda OUFAIDA‚ Omar NOUALI DTISI Laboratory‚ CERIST Research Center 03‚ Rue frères Aissou - Ben Aknoun – Algiers‚ Algeria {houfaida‚ onouali}@mail.cerist.dz Abstract Collaborative filtering systems are probably the most known recommendation techniques in the recommender systems field. They have been deployed in many commercial and academic applications. However‚ these systems still have some limitations
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In contrast cu scenariul clasic de a prezenta situatiile financiare acţionarilor unei societăţi care sunt acum nu mai sunt considerati ca fiind singura parte cu un interes legitim‚ am mai recent am asistat la apariţia altor părţi interesate (muncitori‚ investitori‚ consumatori‚ autorităţile şi organizaţiile neguvernamentale). Astfel‚ în loc de a avea doar o responsabilitate financiară fata de acţionarii companiei‚ ne îndreptăm spre o situaţie în care o companie are o responsabilitate socială înainte
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