Chapter 1 Chemical Reactions and Equations Q.1. Why should magnesium ribbon be cleaned before burning in air ? Ans: Magnesium ribbon is a very reactive metal. When stored it reacts with oxygen to form a layer of magnesium oxide on its surface. This layer of magnesium oxide being a stable compound prevents further reaction of magnesium with oxygen. The magnesium is cleaned before burning in air to remove this layer so that the metal can be exposed to air properly. Q.2. Write the balanced
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CHAPTER 1 THE PROBLEM AND ITS SETTING 1.1 Introduction As time passes by‚ technology continues to evolve. Because of technology‚ new things were created that sustains and lightens human work. Computers were created because of technology. Computers were the greatest things ever invented by man itself. In the modern age‚ computers have become a part of man’s life. Computers with the aid of modern machines made almost all the things around us. From the edited books‚ computers made all
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contain pyrite. Oxidation of sulphides in contact with air and water produces sulphuric acid which reduces the pH of water. The result of these reactions is increase in the solubility of heavy metals and consequently pollution of water resources. The Sarcheshmeh copper mine is one of the largest porphyry copper mines in the world which is located in south-eastern Iran. Chemical analysis of over than 600 water samples taken from streams and springs in the mining region and surrounding area of pit
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mostly because they are not learning things in a good way. In the article‚ "Learning" from Your First Job by Robert Leamnson‚ PhD.‚ the author explains the essential strategies for learning in order to be successful in the college career. Our brain is made of billions of tiny cells called neurons. When we are trying to absorb an information or remember particular things‚ part of our brains are transmitting signals from one neuron to another. That is why learning is part of a biological process because
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murder that he committed. The question that we are here to answer today stands‚ ?is Macbeth guilty of the murder of our beloved king‚ Duncan?. Many questions cloud our judgement today. Did Macbeth have a motive to kill the king? Did Macbeth meticulously premeditate the murder of Duncan? Did Macbeth carryout‚ then cover up the murder of King Duncan? Ladies and gentlemen it will be difficult‚ nay impossible for you to deny any of these allegations of murder against Macbeth‚ because simply put‚ he did commit
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UNIT 1 Lesson 4 Key Question: The monomyth has become one of the most popular and highly used archetypes in literature. The short essay “The Step Not Taken” is an example‚ entailing the three stages: separation‚ struggle‚ and reintegration. During the separation stage‚ the narrator Paul D’ Angelo encounters a junior executive who begins to cry during an elevator trip‚ and his life drastically changes. He also encounters his guide‚ who helps him during the monomyth. Throughout the struggle stage
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Coupled Reactions Louella Rose E. Tan‚ Frances May L. Coralde Institute of Chemistry‚ University of the Philippines‚ Diliman‚ Quezon City 1101 Philippines Results and Discussion A combustion reaction is a reaction that liberates heat and light. Magnesium is a stable element and reacts violently with evolution of much heat and light. The reason the magnesium burned in carbon dioxide was because it combined with the oxygen in the CO2 leaving elemental carbon behind. CO2(g) C(S) + O2(g)
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From Lincoln’s First Inaugural Address March 4‚ 1861 Excerpt #1 Apprehension seems to exist among the people of the Southern States that by the accession of a Republican administration their property and their peace and personal security are to be endangered. There has never been any reasonable cause for such apprehension. Indeed‚ the most ample evidence to the contrary has all the while existed and been open to their inspection. It is found in nearly all the published speeches of him who now addresses
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The progress of the reaction was monitored in my case using two TLC plate. It first started off with the spotting of Standard benzoin and benzil which were provided in the lab and followed by the addition of the reaction mixture at once it starts changing colour/boiling‚ then at 10 and 20 mins into the reflux. Once all the necessary steps were spotted‚ the TLC plate was placed in in a beaker containing CH₂Cl₂(methylene chloride)‚ which was used as the developing solvent in this experiment. To check
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and her ailing mother‚ Susannah Basin‚ from the condition in which their home was found.” He glances up to the king‚ feeling the ache in his sixty-year-old bones from the heaviness of his metal armor. “Needless to say‚” he continues with a worn expression‚ which enlarges his steely‚ deep-set brown eyes. “It wasn’t ‘til after the deaths of Lord Bishop‚ Lord Winslow‚ and their entire households. A connection was later seen by the Royal Seeker‚
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