September 24‚ 2011 Formal Analysis: Marble stele (grave marker) of a youth and little girl with capital and finial in the form of a sphinx; accession number: 11.185a-d‚f‚g‚x Marble stele (grave marker) of a youth and little girl with capital and finial in the form of a sphinx‚ the most complete grave monument of its type to have survived from the Archaic period. 1 The monument is made with marble; the total height is 13 feet and 10 11/16 inches. The monument depicted two young people‚ a
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Decomposition Reaction-Electrolysis of Water Introduction: Demonstrate the decomposition of water in simple but very colorful and dramatic fashion on an overhead projector. Concepts: • Decomposition reaction • Oxidation–reduction • Electrolysis • pH Materials: Sodium Chloride/universal indicator solution‚ NaCl‚ 25 mL Overhead projector Pencil lead‚ 0.7 mm Battery lead with alligator clips Petri dish‚ disposable Battery‚ 9-Volt
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CHEMISTRY Guess Paper – 2013 Class – XI Subject - CHEMISTRY MAX MARKS=90 ……………………………………………………………………………………… General instructions: All questions are compulsory. Marks for each question are indicated against it. Questions number 1to 8 are very short –answer questions‚ carrying 1 mark each. Answer these in one word or about one sentence each. Questions number 9 to18 are short –answer questions‚ carrying 2 marks each. Answer these in about 30 words each. Questions number19 to27
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in developing countries the economy is poor and they don’t have the resources to maintain the originality of these artefacts. The Elgin Marbles‚ a significant denominator of Greek History‚ are a present concern under the debate‚ ‘Who owns the past?’ generally between curators and the Greek government. Initially‚ the Greeks held possession of the Elgin Marbles‚ in Athens but they were removed by the British Lord
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SUBSTANCES IN INDUSTRY NAME: NUR INSYIRAH BTE. AB HAMED CLASS: 4 SAINS GUNAAN (SG) SCHOOL: SMK SERI INDAH CONTENT Content Introduction 9.1 Sulphuric acid 9.1.1 Properties of sulphuric acid 9.1.2 The uses of sulphuric acid 9.1.3 The industrial process in manufacture of sulphuric acid 9.1.4 Environmental pollution by sulphuric acid 9.2 Ammonia and its salt 9.2.1 Properties of ammonia 9.2.2 The uses of ammonia 9.2.3 The industrial process in manufacture of ammonia 9.3 Alloys 9.3.1 Physical
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Acid rain is a rain or any other form of precipitation that is unusually acidic‚ meaning that it possesses elevated levels of hydrogen ions (low pH). It can have harmful effects on plants‚ aquatic animals and infrastructure. Acid rain is caused by emissions of sulfur dioxide and nitrogen oxide‚ which react with the water molecules in the atmosphere to produce acids. Governments have made efforts since the 1970s to reduce the release of sulfur dioxide into the atmosphere with positive results. Nitrogen
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Marble Female Figure Cycladic Final Neolithic‚ ca. 4500-4000 BC Bequest of Walter C. Baker‚ 1971 (1972.118.104) “The figure represents a rare type known as steatopygous characterized by particularly full legs and buttocks‚ and is undoubtedly indicative of fertility. “ RACHELLE DARDEN Rachelle Darden Art History 11 Short writing Assignment 2
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CHEM 301 LECTURE Unit 1 0 . COORDINATION CHEMISTRY Factors t hat affect solubility: Common ion: decrease in solubility Complex ion: increase in solubility How does complex ion formation increase solubility? Consider the complex ion formation between silver and ammonia: + Ag + 2NH3 A g(NH3 )2 + Kf = 1 .5 x 10 7 where Kf i s the formation constant (always >1 ‚ formation of the complex is highly favorable) Complex ion formation increases the solubility of sol ids in water
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test is a chemical test used to determine the presence of nitrate ion in solution. A common nitrate test‚ known as the brown ring test[1] can be performed by adding iron(II) sulfate to the solution‚ then slowly adding concentrated sulfuric acid (NOT nitric acid‚ for obvious reasons) and watching for a brown ring on the test tube‚ which will indicate the presence of the nitrate ion.[2] Note that the presence of nitrite ions will interfere with this test.[3] The test follows several phases; these
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Introduction: Acid rain has proven to be a big problem for Connecticut. It has had a great impact on builders‚ wildlife‚ and the water sources. Acid rain has many components in it such as pollutants from plants to sulfuric acid from burning coal. Problem: Which stone is the most resistant against acid rain? Hypothesis: If we test the different stones against acid rain then red sand stone would be the best because it is heavier and cannot be easily broken. Independent variable: Type of stones
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