experiment is to convert copper metal through a series of intermediate copper compounds back into copper metal. By weighing the copper at the beginning and at the end of the experiment the percentage yield can be determined. Method: The experiment was carried out as outlined in the practical manual. Results: Table: showing masses: Mass copper wire 0.2510 Mass crucible 28.9257 Mass watch glass 19.6213 Mass watch glass + copper 19.7890 Mass copper product 0.1677 Calculations:
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Reactions of Copper Data: Part I: Preparing a solution of copper (II) nitrate Initial mass of copper wire: .520g Mass of copper wire after vigorously scouring: .518g Observations of Copper (II) ribbon mixed with HNO3: Solution turned green. Thick brown gas formed. Copper (II) bubbled vigorously. Cu (II) dissolved‚ solution appeared green/blue. After the addition of H2O a blue crusty precipitate formed. Part II: Synthesis of solid copper (II) hydroxide Observations of Copper (II) nitrate
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To determine the percentage by mass of Calcium carbonate in an egg shell Aim: is to find and work out the percentage of calcium carbonate by mass in eggshells by using acid base “back titration” Introduction: Calcium Carbonate‚ CaCO₃‚ is a compound which is polymorphic and therefore means that it can be found in a variety of different objects or organisms. For example: Rocks (limestone‚calcite)‚ sea snail shells‚ Eggshells‚ pearls and many more. This investigation will focus on finding out the
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Penny-Ante Equilibrium Introduction What is equilibrium? What happens to the amount of reactants and products when equilibrium is reached? What if more reactants or products are added to a system already at equilibrium? In this activity‚ pennies will be used as reactants and products in a reversible reaction to answer these questions and learn more about the fundamental nature of equilibrium. Concepts • Reversible reactions • Equilibrium • Equilibrium constant • LeChatelier’s principle Materials
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India GDP Composition Sector Wise The Gross Domestic Product or GDP is the indicator of the performance of an economy. According to the estimates of 2008‚ India’s GDP is $1.209 trillion and this is slated to make improvement in the coming times. It is estimated that India’s GDP will grow by 6.5% in the year 2009. In 2008 the country’s GDP was 9%; the slowdown that has been witnessed this year in the estimates is largely due to the slowdown witnessed by the agriculture and the industrial sectors.
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Penny Stocks vs. Options: The similarities and the differences By SEC‚ the meaning of penny stocks is given as the following. The expression "penny stocks" for the most part alludes to a security issued by a little organization that exchanges at under $5 per offer. Penny stocks‚ for the most part‚ are cited over-the-counter‚ for example‚ on the OTC Bulletin Board (which is an office of FINRA) or OTC Link LLC (which is possessed by OTC Markets Group‚ Inc.‚ earlier known as Pink OTC Markets Inc.);
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Music Analysis – Asher Harris Contemporary Classical Music‚ a modern from of art music that began in the 1920s to the present day. This style will be able to show the audience for the annual Young composers’ symposium the characteristics‚ tone and style of Contemporary Classical Music. A Brief history At the turn of the century‚ music was characteristically late Romantic in style. Composers such as Gustav Mahler‚ Richard Strauss and Jean Sibelius were pushing the bounds of Post-Romantic Symphonic
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In The Yearling‚ Marjorie Kinnan Rawlings depicts Penny Baxter as a hardworking father wanting the best and willing to do anything for his family. In chapter one‚ Jody returns from playing in the woods and sees his father chopping wood. Distressed‚ Jody thinks “[h]e was doing Jody’s work‚ and in his good coat” (9). Penny Baxter’s readiness to do Jody’s chores so the family can have firewood reveals his strong work ethic. Penny wants his son to play and his wife to have wood‚ so he shoulders extra
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An Essay on The Philosophy of Composition by Edgar Allan Poe "The Philosophy of Composition" is an essay written by Edgar Allan Poe that describes a theory in which he discusses what process of writing leads to a successful poem or a narratative. E. A. Poe wrote this essay shortly after he had completed his masterpiece "The Raven" and it is indeed this very poem that he chose as an example to describe how to craft a poem according to his methods. "The Raven" as he says was an attempt to compose
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Mass of Zinc Determination on Galvanized Nails Introduction. In this experiment the mass of zinc on galvanized iron nails was calculated to determine the appropriate price that should be charged to coat a nail with zinc (galvanize) it. The effectiveness of gasometric and gravimetric analysis were assessed by carrying out both methods mathematically using values determined by this experiment‚ and then comparing these values using their percent differences. The mass of zinc found on each nail can
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