Determining the Percent Copper and Zinc in Pennies from Density Lab Report Procedure: For pre-1982 pennies- Mass 10 pennies‚ record data. Fill a 100mL graduated cylinder to 40mL or enough to fully submerge the pennies with water‚ record the volume in data table. Carefully place the pennies into the graduated cylinder‚ record the final volume of the water in data table. To find the volume of the pennies‚ subtract the final volume from the initial‚ record the data. Repeat this procedure twice more
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It’s hard to choose a specific leader I admire the most‚ but if I had to choose one‚ it would be Malala Yousafzai. From what I read from her autobiography‚ I greatly admire her acts of leadership‚ courage and determination for change. She may not be as known‚ but her story and her beliefs are just as great as those we look up to today‚ such as Martin Luther King Jr.‚ Gandhi‚ Abraham Lincoln and so on. She is a young Pashtun girl from Pakistan who is suppressed by the Taliban from getting an education
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Determination of a Rate Law Megan Gilleland 10.11.2012 Dr. Charles J. Horn Abstract: This two part experiment is designed to determine the rate law of the following reaction‚ 2I-(aq) + H2O2(aq) + 2H+I2(aq) + 2H2O(L)‚ and to then determine if a change in temperature has an effect on that rate of this reaction. It was found that the reaction rate=k[I-]^1[H2O2+]^1‚ and the experimental activation energy is 60.62 KJ/mol. Introduction The rate of a chemical reaction often
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Objective To determine soluble solid concentration in some fruits including tropical and temperate fruits by using handheld refractometer. Introduction “Sugar are the major soluble in fruits juices and estimate of sweetness. Other soluble materials include organic and amino acids‚ soluble pectins‚ and others. Soluble solid concentration can be determined in a small sample of fruits juice using a hand held refractometer. The measurement must be made at 20°C to get an accurate value. This instrument
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12.097 Environmental Chemistry of Boston Harbor – IAP 2006 Lab 1: DETERMINATION OF DISSOLVED OXYGEN BY WINKLER TITRATION 1. Background Knowledge of the dissolved oxygen (O2) concentration in seawater is often necessary in environmental and marine science. It may be used by physical oceanographers to study water masses in the ocean. It provides the marine biologist with a means of measuring primary production - particularly in laboratory cultures. For the marine chemist‚ it provides a measure of
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Determination of the Equilibrium Constant for Ferric Thiocyanate In this laboratory exercise‚ the equilibrium constant(Kc) for the reaction between the Ferric Ion (Fe3+) and the Thiocyanate Ion (SCN-) was determined. After measuring the absorbance of the Ferric Thiocyanate‚ and carrying out some calculations; it was determined that Kc=130.81M Introduction: Chemical equilibrium is established when a reaction exists in a state where the forward reaction rate is equal to its reverse reaction
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Wage determination in perfect and imperfect markets Perfect competition In perfect labor markets‚ everyone is wage taker – both the employee and the employer. On the one hand‚ the employer and his firm cannot control the market as there are too numerous firms and the firm is price taker on the product market and labor market. On the other hand‚ the workers cannot control their wage as they have no economic power to do so or they are of a clearly definite type. In perfect competition there
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When you feel like giving up do your parents push you‚ or do you perceiver and keep trying. Well‚ thats determination‚ which I think is the key to success. Determination helps people get through things‚ although skills and talents are your support you can’t do it without purpose or in other words determination. Determination is the key to success JK Rowling‚ Walt Disney‚ and Michael Jordan failed‚ but they believed and were determined to continue and look where they are now. Not all people were
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Regression Coefficient Table Conclusion Determination foreign exchange rate In Bangladesh Purpose of the study: The aim of this paper is to determine the foreign exchange rate and expose to impact on the economy .Strong economy depend on the active foreign exchange rate. If the foreign currency is appreciated or devaluated‚ Country will be affected this reason Problem statement: Determination of Foreign exchange rate has great impact on the
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Melissa Carrithers 9-17-14 Period: 6 Determination of the Empirical Formula of Silver Oxide Purpose: To find the percent composition and empirical formula of silver oxide can then be calculated‚ based on combining the ratios of silver and oxygen in the reaction. Hypothesis: Silver oxide decomposes to silver metal and oxygen when strongly heated. Heating Silver oxide causes the oxygen to be driven off‚ leaving only the silver metal behind. The total mass of the products of a chemical reaction must
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