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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Electronic Records Langemo (1995) describe records as the memory of the organization‚ the raw material for decision making‚ and the basic for legal defensibility. Meanwhile Gagnon (1987) defines records from the functional standpoint when he says all recorded information regardless of media or characteristic‚ made or received and maintained by an organization or institution in pursuance of its legal obligations or in the transaction of business. However‚ Clubb (1991) admits that it was relatively
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metals arranged in order of their reactivity based on displacement reactions‚ reduction of their oxides by hydrogen or carbon‚ the relative ease of decomposition of their compounds and reactions with oxygen‚ dilute acids and water. The higher up a metal is in the reactivity series‚ the more reactive it is. In the experiment conducted‚ the three metals‚ magnesium‚ zinc and copper each had to undergo displacement reactions and reactions with water‚ oxygen and dilute acids‚ to arrange them in the order
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Title Experiment 17 Reaction Kinetics- Determination of the Activation Energy of the Reaction Between Oxalic Acid and Potassium Permanganate. Objective To determine the activation energy of the reaction between oxalic acid and potassium permanganate. Theory and Background Activation energy is the minimum amount of energy that is required to activate atoms or molecules to a condition in which they can undergo chemical transformation or physical transport. In terms of the transition-state
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correct world. There are topics about morals‚ standards‚ and personal ethics. One of the newest debatable subjects however‚ is the one concerning this new centuries way of casting an individual’s vote‚ through electronic voting. Electronic voting is a way to cast a person’s ballot using an electronic voting machine that is touch screen. There are many advantages to using these machines during an election but there are also many disadvantages to using them as well. Before a person can make their own judgments
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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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Redox reactions (Redox terminology‚ galvanic cells‚ standard electrode potentials‚ strength of oxidizing/reducing agents‚ corrosion and protection against it) Oxidation is defined as the loss of electrons and reduction is defined as the gain of electrons. Oxidizing agents‚ such as oxygen are defined as substances which accept electrons; reducing agents are substances which donate electrons. Redox reactions are: a) The reactions of metals with non-metals 2Na+Cl2→2Na+Cl- b) The reactions
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without a downside though. With these electronic technologies becoming cheaper and more expendable it creates a situation where the disposal of these electronics. Electronic waste problems are not just of where you dispose of it‚ but also how it effects the area around the dump site. Studies have shown that‚ “heavy metals pollution of groundwater‚ soil‚ and plants is an issue of environmental concern‚ especially when e-waste is involved”(Olafisoye‚ 7). With electronic waste continuing to grow this pollution
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Electronic Waste and the Environment In today’s fast paced society‚ technology is moving faster than ever due to advancements that are being made in speed‚ portability‚ and user accessibility with new computers and other electronic devices being introduced to the market. However‚ all of this new technology creates a problem because of the discarding of older electronic equipment. According to the Environmental Protection Agency‚ the United States alone produces approximately 300 millions tons
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and Electronics Engineering‚ Vol. 3‚ No. 2‚ March 2013 A Preview on Microcontroller Based Electronic Voting Machine Diponkar Paul and Sobuj Kumar Ray‚ Member‚ IACSIT Abstract—Voting is most pivotal process of democratic society through which people determine it’s government. Governments around the world are increasingly considering the replacement of traditional paper-based voting schemes with electronic voting systems. Elections of Bangladesh are conducted most exclusively using electronic voting
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