Determining the Percentage of Copper in a Copper Ore Aim: To determine the percentage of copper present in malachite. Hypothesis: That the percentage of copper in the malachite will be four percent. Materials: 2 x 250mL beaker‚ pestle‚ malachite‚ sulfuric acid‚ water‚ 2 x filter paper‚ funnel‚ filter stand‚ Safety Precautions: Wear safety glasses at all times when dealing with chemicals and apron to avoid ruining clothes. Method: Record the mass of the malachite sample. Place the malachite
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In the novel Copper Sun the viewpoints were taken from a 15-year-old slave girl named Amari‚ and a 17-year-old indentured servant Polly‚ Copper Sun is a story of the struggles in the face of human beings during slave times and a hope for freedom against all odds and circumstances. In the novel the AOI that it is portrayed is the area of Health and social education. I chose this AOI because both Amari and Polly had to adapt to their new surroundings and they also had to learn the routes around the
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and nothing more. At night if you were female you got raped often. If you were a male you worked in the rice fields‚ with the alligators and the snakes and if you ever disobeyed or did something incorrect you were wiped and beaten. In the book the copper sun Amari the female protagonist‚ goes through these hardships and has to find some reason to live and fight for her freedom. Amari shows traits of perseverance‚ bravery and strength. But still through all of these things she fights to be free.
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Knowing Your Audience ans Communication Release The news of a devastating accident is not easy to prepare or communicate to any one involved. Being the bearer of bad news is never easy. The way in which the news is delivered‚ and what must be done before and after the news is relayed is also important. The needs of the employees is different than the needs of the family members of those men who were trapped in the mine. It is vital to make sure to address each of these groups in a
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Hydrometallurgy 105 (2010) 148–154 Contents lists available at ScienceDirect Hydrometallurgy j o u r n a l h o m e p a g e : w w w. e l s ev i e r. c o m / l o c a t e / h yd r o m e t Treatment of copper flash smelter flue dusts for copper and zinc extraction and arsenic stabilization A. Morales a‚ M. Cruells b‚ A. Roca b‚⁎‚ R. Bergó b a b Universidad Católica del Norte‚ Department of Metallurgical Engineering‚ Antofagasta‚ Chile Universitat de Barcelona‚ Department of Materials Science and Metallurgical
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Copper in Silver Nitrate Lab: Making Silver Sabrina Kate S. Carranza – Chemistry Hour 6 I. Purpose: The purpose of this experiment is to distinguish the relationships between reactants and products‚ in addition to expanding on concepts such as single displacement reactions‚ mole ratio values‚ moles to mass‚ theoretical yields‚ limiting reactants‚ excess‚ stoichiometric relationships and percentage errors. II. Hypothesis: /3 -If the copper metal is submerged in the silver nitrate solution
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Finding the Optimal pH of the Enzyme Peroxidase with the Aid of a Spectrophotometer ABSTRACT The peroxidase enzyme was partially purified‚ and the enzyme activity was calculated with the use of a spectrophotometer‚ demonstrating the effect of pH on peroxidase activity. The objective of this exercise was to determine the ideal pH for peroxidase activity. The data concluded that the optimum pH for peroxidase activity is 5‚ and the “standardized” enzyme volume is 2.8mL
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Copper Chloride Lab Report Procedure Part A: 1. Pick up the container of copper chloride dehydrate‚ and observe material. Describe crystals in detail‚ and write down all of the observations. Part B: 1. Take a 100 ml beaker and fill ¼ of it with water. Use a spatula to add some copper chloride dehydrate to the beaker filled with water. Record the observations. Be sure to observe the water and the copper chloride dehydrate. 2. Stir the contents in the beaker with
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Copper Sun Compare and Contrast Essay The book Copper Sun by Sharon Draper is a realistic story about a slave girl named Amari. Amari was taken from her village when “milk looking” men came and attacked them. The men killed the old and the young. Amari’s parents and her brother were all killed. Amari was then taken to Cape Coast and that is where she met Afi. Afi is like a motherly figure to Amari. Amari was then put on the “Ship of Death”. They were on the ship for a long time. They landed on Sullivan’s
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Chilean Copper Mine Collapse NAME BCOM 275 University of Phoenix Professor ??? DATE Knowledge of your audience is the most important part of communication. When you know the correct form of communication to use and what data to include‚ it will guarantee that the receivers will be able to process the message being provided. Knowledge of your audience will make the delivery of the message being sent is done properly. When a catastrophe occurs‚ knowledge of your audience is
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