Determination of Trace Amount of Copper and Zinc in an Aqueous Solution by Atomic Absorbance Spectroscopy Abstract: The purpose of this experiment is to analyze a sample containing copper and zinc in trace amounts‚ where standard addition method was used and the instrument used is the atomic absorbance spectroscopy. The amount of copper obtained was 0.569 ppm ± 0.015 and for zinc we obtained 0.42 ppm ± 0.0027. Introduction: This method implies the excitation of particles in the solution sample
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you’re bound to see updates on some war happening in some country. One thing that everyone on this planet seems to have in common is that no matter where one lives or who they are we all cannot escape the impact of war. The poem The Diameter of the Bomb brings this idea to light by talking about how the impact of violence doesn’t stop within the area it happened. “At the distant shores of a country far across the sea includes the entire world in the circle. And I won’t mention the howl of orphans
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Experiment B2‚ Heats of Combustion – The Bomb Calorimeter. Objectives: To calibrate a bomb calorimeter by the combustion of benzoic acid. Then to use the calibrated calorimeter to measure the heat of combustion of naphthalene and calculate the heat of formation of naphthalene. Theory: q = C.ΔTBA C = q / ΔTBA Moles = mass / Mr ΔŪ = ΔU / moles ΔHoc‚298 = ΔŪoc‚298 + PDV = ΔŪoc‚298 + RTΔn C10H8 (s) + 12O2 (g) 10CO2 (g) + 4H2O (l) ΔHoc‚298 = - 1
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Michael Jackson and Bubbles 1988 by Jeff Koons is without a doubt a controversial work of art that delves into popular culture in such a way that hegemonic readings of the sculpture are not possible. The image invokes oppositional readings by different viewers with such polarization that this masterpiece‚ if it can be called that‚ is referred to as both sublime and banal‚ as a valued work of art and as a kitschy commodity. This diversity in the assessed meaning of this work draws upon deeply rooted
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Atomic Spectra Lab Purpose: The purpose of this lab was to identify the wave length and spectra of the two elements‚ mercury and hydrogen. The wavelengths of the two elements represent the characteristic energies of moving electrons. The spectra of the two elements are what side of the energy spectrum their wavelengths are on. Materials: • Hydrogen lamp • Mercury lamp • 2 diffraction devices • Flashlight • Paper • Pencil • Calculator Procedure: 1. Place
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IF YOU WERE PRESIDENT HARRY TRUMAN‚ WOULD YOU HAVE MADE THE SAME DECISION AS HE DID‚ WITH DROPPING THE ATOMBOMB ON HIROSHIMA? The 6th of August 1945 was a day that people will always remember with terror. On this day‚ an atomic bomb was used by the U.S. against Japan‚ in the city of Hiroshima. This was the first time in world history. Before this sad event‚ Japan and the U.S. were having conflicts with each other because Japan tried to invade parts of Europe and the Pacific. In an attempt stop Japanese
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casted an aura of heavenly peace over its three hundred and fifty thousand inhabitants. That peaceful heaven‚ however‚ was about to be obliterated by a destructive new weapon created by the United States of America. That morning‚ the first nuclear bomb ever created was deployed over Hiroshima. Its virtually unimaginable power obliterated the entire city along with forty percent of its population within seconds. America succeeded in creating the most destructive weapon mankind had ever seen‚ and it
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Terrorism or Bomb Blasts Outline: 1. Introduction—Terrorism is the use of violence to get political demands. 2. Who is involved in the acts of terrorism and why? 3. The disadvantages of terrorism 4. How can we do away with terrorism? 5. Conclusion—Sincere and combined efforts are needed at international level to do away with terrorism without any discrimination. Essay: Terrorism is the use of violent actions in order to achieve political aims or to force a government to act. Today the world is very
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Ehrlich’s Population Bomb "People are realizing that we cannot forever continue to multiply and subdue the earth without losing our standard of life and the natural beauty that must be part of it. these are the years of decision- the decision of men to stay the flood of man." Ehrlich here explains the one of the most pressing problems facing man in the 20th century. In Population Bomb‚ Ehrlich explains that pollution‚ shortages‚ and an overall deterioation of the standard of living is all due
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Atomic Structure & Electricity 1. Draw an atom with an atomic number of 12. Label the protons‚ neutrons‚ and electrons. Use the periodic table to identify which atom you have drawn. 2. How many valence electrons are present in this atom? 2 3. Would this atom prefer to gain or lose electrons? Why? Lose‚ because the octet rule dictates that if there is less than 4 valance electrons‚ they would prefer to leave the atom. 4. Describe the differences between conductors‚ semiconductors
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