gain or lose during a reaction. Each atom in an equation can be assigned an oxidation number according to certain rules. If the oxidation number of an atom increases as you go from the left side to the right side if an equation‚ oxidation has occurred (electrons have been lost); if the oxidation number decreases‚ reduction has occurred (electrons have been gained). MnO4¯ + 8 H+ + 5e¯ → Mn+² + 4 H2O (1) In the above reduction half-reaction‚ manganese has undergone
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question). Page 2 of 10 Give one example of each of the following: (i) a pure liquid with an extremely low surface tension Answer: any molecule with low interatomic/intermolecular interactions Examples include – liquid He‚ Li‚ H2‚ (ii) a strong Lewis base Answer: Any Group I or Group II hydroxide e.g.‚ LiOH‚ NaOH‚ KOH‚ Ca(OH)2 (iii) a pure substance which can be melted by reducing pressure at a given temperature Answer – Almost any compound but water; examples include sulfur‚ N2‚ phosphorus
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CIPD ASSIGNMENT SUBMISSION DECLARATION To be completed by candidate: Centre name: ACACIA LEARNING Candidate name: Lucianne Powell CIPD Qualification undertaken: CIPD Membership No: 42847350 Unit code(s): 3PRM Unit title(s): Supporting Good Practice in Performance and Reward Management Unit tutor: Karen Philpson Date due for assessment: 2nd December 2014 Date submitted: 1st December 2014 Word Count: State number of word used Candidate declaration: I confirm that the work/evidence presented
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is Free Will? Denise Dale What is Free Will? Free will is the driving force of human existence and individuality. It directs human actions‚ thoughts and desires. Free will is what distinguishes humankind from all other creations of existence. Animals do not have free will. Plants and flowers do not have free will. Humans live their lives. Out of all that there is of existence that depends on air for life‚ only humans truly have free will. As per the Merriam-Webster dictionary Free is
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produced by fireworks like ‚ brightening the night sky and plunging it with vivid displays of colour and insignificant‚ which makes them a crowd pleaser. Behind all the excitement of fireworks‚ chemistry plays an important role in creating the vivid colours we witness lighting up the sky. The actual chemical reactions that take place in the explosions require the use of oxidisers‚ reducing agents and binders. The additions of varying metal chlorides add the colours. An oxidizing agent producing the oxygen
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scientifically and properly‚ for example‚ by burying them. Our environment problems have been very serious already. Let us just look at the plastic bags’ bad role. Every year more than 4000 million’ plastic bags have been distributed by the supermarkets and shops including the little shops. It equals the 30000 million tons’ emissions. If we do not protect the environment well‚ the nature will have bad effect on us; sometimes we may lose our property‚ even lives. For example‚ the snow and ice disasters
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OPER 1027-Coursework 3 (30/3/2015) Select a company and provide an account of its operational activities. You need to identify which of these activities contribute more strongly to the creation of customer value. Further‚ you should discuss which aspects of the company’s operations may raise ethical or environmental concerns. The report should refer to the operations management concepts and theories that have been discussed throughout the course. Evidence of secondary research regarding the company’s
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AbstractThe rates of reaction of Alkali metals and Alkaline Earth meatals are compared in this lab. The pH of each of the resulting metal solutions are tested and the products of the reaction between calcium and water is discovered. The tested elements are sodium‚ lithium‚ potassium and calcium and each of them were placed in a beaker filled with water. The resulting solutions pH levels were tested with litmus paper. There were more steps for caclium because it is the only Alkaline Earth metal. For
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.Experiment for Chemistry Coursework For this investigation I am looking at how the concentration of acid can change the reaction and how I can explain this using collision theory. My Prediction: I predict that the greater amount of concentration the faster the reaction will take place. Therefore‚ particles in the two compounds will collide faster. Due to my prediction if it is correct‚ I expect to see the cross on the paper disappear faster. As I already know that increasing one quantity
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Jashandeep Gill Gammellos Chemistry Density is one of the fundamental principles of physics. Density is the reason why a plank of wood floats on water while a piece of metal several times smaller will sink. Density of an object is measured in g/cm³ or g/cc. The equation is D=M/V‚ D being the density of the object‚ M being the mass of the object‚ and V being the volume of the object. Mass is the space an object takes up. It is the amount of matter present in an object. Mass is measured using
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