Chilean Copper Mine Collapse Sabrina Green BCOM/275 Week 4 Celeste Bajorek Chilean Copper Mine Collapse On Thursday‚ August 5‚ 2010‚ the collapse of one of the shafts in the Chilean copper mine left 33 workers trapped approximately 300 meters underground. Rescue efforts began at once‚ but just two days later another collapse in the mine halted the efforts of the rescue crews for many hours (Weil‚ 2010). With such a devastating situation‚ the company should take
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Determining Percent of Water Crystallization and the Chemical Formula of a Hydrate Aim: To determine the percent water of crystallization and the chemical formula of a hydrate Materials * 400 ML beaker * Glass rod * 3 to 5 grams of hydrated copper (II) sulfate CuSO4 (crushed) * Bunsen burner * Spatula * Heating pad * Clamp and stand * Electronic balance Procedures Refer to Lab sheet Observations 1. The powder seems to be very bright and shiny before any heating 2.
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to imagine dancing them. I found that the swirls could serve as a trajectory for different body parts or pathways‚ and the almost lackadaisical way in which he meshed colors inspired a smooth movement quality. One of his painting‚ Fritillaries in a Copper Vase‚ especially stood out to me choreographically. The way in the flowers laid downward reminded me of hands potentially
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CHEMISTRY TITLE: ANALYSIS OF COPPER IN BRASS BY UV-VISIBLE SPECTROSCOPY NAME: OPOKU ERNEST DATE: 21ST JANUARY‚ 2014 Page 1 of 9 TITLE: ANALYSIS OF COPPER IN BRASS BY UV-VISIBLE SPECTROSCOPY AIMS AND OBJECTIVES: By the end of this experiment‚ the student should be able to demonstrate the following proficiencies: 1. To determine the percentage of copper in brass by UV-visible spectroscopy. 2. Properly calibrate and use a spectrophotometer. 3. Convert percent transmittance to absorbance
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Down with the Top Ten Percent Many colleges try to have a racially diversified environment by using affirmative action. Some colleges used the point system which would give an edge to minorities over Caucasians. The supreme court of Texas prohibited colleges to use affirmative action. When affirmative action was prohibited‚ minority enrollments at colleges decrease. To racially diversify colleges‚ Legislature passed the top ten percent rule. The top ten percent rule states any high school
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H_2 The purpose of this experiment is to determine the mass % of through the Volumetric Analysis method. To attain this purpose‚ a decomposition reaction was performed‚ which can be separated into two steps. First‚ 2 mL of was reacted with approximately .5 g of KI in an Erlenmeyer flask to form and a hypoiodite species. The second step is the reaction between another molecule of and hypoiodite‚ which results in reformation of the catalyst‚ potassium iodide. The catalyst is used to speed up
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Dewbert is one hundred years old and she has a penny for every year that she has been alive. Aunt Dew keeps her pennies in an old wooden box that she calls her hundred penny box. When Aunt Dew moves from Atlanta to live with Michael’s family‚ he is drawn to the hundred year old woman. Michael spends a lot of time with her counting the pennies from the box‚ and with the count of each penny aunt Dew tells him a story about that particular year that the penny was added into the box. Michael’s mother wants
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1. What was America’s first penny candy to be individually wrapped? Tootsie Rolls were the first individually wrapped candy and were sold for one penny each beginning in 1896. http://www.ehow.com/about_5435061_whatever-happened-penny-candy.html 2. At which fraternity at which college was the movie Animal House based? The Alpha Delta fraternity at Dartmouth College in Hanover‚ N.H.‚ is said to be the inspiration for the 1978 movie "National Lampoon’s Animal House." The house was raided by police
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all just agree that the penny should be removed? Is it possible that simple nostalgia and our fond memories of "take a penny‚ leave a penny" trays are protecting a coin that’s worthless to pretty much everyone besides the multinational conglomerate that helps produce it? And if not‚ why exactly is the penny worth keeping around? The penny for some time has been the “throw-away” change thus having a negative impact on the economy‚ because with all the accumulated pennies‚ is all the money thrown
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of 600 seconds for a reaction between copper (II) sulfate (CuSO_4) and zinc(Zn) using a temperature probe. Time/ s (± 1 s) Temperature / °C (± 0.05 °C) 0 27.9 30 25.9 60 25.9 90 25.8 120 25.8 150 48.7 180 57.6 210 61.1 240 62.7 270 63.5 300 62.8 330 61.3 360 59.3 390 58.9 420 57.7 450 56.5 480 55.2 510 54.2 540 52.6 570 51.9 600 51.1 Qualitative observations:- Table 2: table depicting the qualitative observations observed during the reaction between Copper (II) sulfate solutions (CuSO_4) and Zinc
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