Recovery of Elemental Copper from Copper (II) Nitrate Objectives: Students should be able to… recognize evidence(s) of a chemical change convert word equations into formula equations perform a series of chemical reactions in order to recycle the element copper determine the percent recovery of elemental copper Challenge: How good and accurate a chemist are you? Given a solution of Cu(NO3)2‚ what percentage of elemental copper can you recover from the original solution? Materials:
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The way a new invention is used makes it good or bad. The same is the case with science. It plays a very important and useful role in our life and can be a friend‚ or a foe according to the way it is used. Science tries to explain the principles behind natural phenomena‚ and scientists for long have been harnessing this knowledge for the benefit of the society on the whole. Nagarjuna‚ an ancient‚ leading Indian scientist‚ discovered many methods of curing diseases‚ using plants for medicinal
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ANDREW KRAUSS “HUMAN REVOLUTION” 1. When anthropologists discovered “Lucy” in 1974‚ they considered her the oldest hominid of age 3.6 million years ago. How has the discovery of old hominid-like remains affected the “line” of evolutionary descent? They have declared sahelanthropus to be on the line this led to gorillas‚ not humans. Explain why a newer model of human ancestry is emerging. Different species are reproducing together. 2. What problem do paleontologists have with cataloguing
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development more of a blessing or a curse to mankind? It is obvious to know how much technology has helped us in our daily lives. Last time‚ people had to walk miles just to go to school or work. However‚ thanks to the advancement of technology‚ people now can either take bus or drive a car to reach their destination. Thanks to the advancement of technology‚ it is now very convenient to move from places to places. If you look around‚ technology is almost everywhere! Now‚ we can send email to our
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How can genuine democracy emerge from authoritarian regimes? Victoria Yuzova St.Petersburg State University 2013 Contents. Introduction. 3 1.What is authoritarianism? 3 2.What is Democracy? 4 3. Democratization. 5 3.1. Definition of democratization. 5 3.2. What can facilitate transition to democracy? 6 3.3. Historical cases 9 3.4. Views on democratization. 10 Conclusion. 12 Bibliography. 14 Introduction. Peaceful protests with
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Misfortune may be an actual blessing As a Chinese proverb goes‚ “Misfortune may be an actual blessing.” I underwent some events several years ago and I learned from them. My failure in the college entrance examination and the life of university in China was a precious memory as well as a good lesson for me. Finally‚ the chance to study abroad must be the excellent choice for me. I learned from my experience that something happened unsuccessfully might not be the eventual ending‚ and a turning point
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Work- a Burden or a Blessing? Imagine if you could plan your perfect day and have everything fall directly into place. What activities‚ people‚ or events would you include? While in my junior year of high school my perfect day was planned. It was going to be on Memorial Day‚ the day every student looks forward to in California. It’s the first official beach day of the summer and that year it was going to be the best. Summer had come early and it was hot‚ breaking all previous years high temperatures
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Is Technology A Blessing Or A Curse? Nowadays‚ ALL PEOPLE IN THE SOCIETY LIVING IN URBAN AREAS ARE HOOKED IN TECHNOLOGY. The daily use of technology in their everyday life had been their daily routine‚ usage of devices like Computer‚ mobile phone and other gadgets that had been discovered. Unfortunately‚ people can hardly control their self on being hooked in technology these days. Being Hooked in technology have become bad Habit on a person. It brings harm like radiation‚ radiation
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SYSTEM FAILURE CASE STUDIES SEPTEMBER 2009 VOLUME 3 ISSUE 06 A Half-Inch to Failure At 6:05 pm‚ on Wednesday‚ August 1‚ 2007‚ the Interstate-35 West (I-35W) bridge over the Mississippi River in Minneapolis collapsed. On the day of the collapse‚ four of the bridge’s eight lanes were closed for planned construction. Four weak connector plates fractured under the combined burden of rush hour traffic‚ concentrated construction equipment‚ and previous heavy renovations. The bridge fell 108
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states that in a choice between bad company and loneliness‚ the second is [preferable]. I would [prefer] that you children play outside this afternoon. I want to clean up the house a bit. We can have the meeting today or tomorrow; I don’t really have any [preference]. When filling positions which come open from time to time‚ we generally give [preference] to internal applicants. Some of the parents of the other kids on the team believe the coach has been giving [preferential] treatment to his own
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