Observations: Part I: Reaction between iron and oxygen Appearance of steel wool after 20 minutes From (relatively) shiny metal strips to not-so-shiny strips that are stained with dark‚ reddish-brown stuff. Part II: Decomposition of hydrogen peroxide Appearance of potato and hydrogen peroxide combination: Lots of white‚ foamy bubbles around the potato slices. Day 2 Observations: Part III: Reaction between zinc and acetic acid Appearance of penny in vinegar after
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Conflicts in “The Story of an Hour” “The Story of an Hour” is a short story written by Kate Chopin. The story is about a young women in the 1900s being told that her husband has been killed in an accident. Many different internal and external conflicts arise throughout the story. This essay will describe three of them. The first conflict is external‚ man vs. nature. Mrs. Mallard‚ the women in the story‚ has some sort of heart disease. The story begins with her sister‚ who has to break the news
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Guilt Reaction Paper By Guilt is defined as any tension‚ discomfort‚ sense of shame‚ or other unpleasant feeling that humans experience. Kenneth Burke argued that guilt is the central motive for human action‚ specifically communication. According to Burke‚ the ability to feel guilt is an emotion only felt by humans‚ and is possible because we are symbol using animals. Burke argued humans always feel guilt thus are always trying to purge themselves of the discomfort that guilt causes us
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The Story of An Hour is a fiction story written by the legendary writer Kate Chopin in 1894. The story narrates the life and times of a ‘widow’ soon after receiving news of her husband’s demise through a railroad accident. The fiction is rich with literary styles and spoiled especially with symbolism and theme. Symbolism is defined as an artistic skill where a writer uses symbols and images to represent ideas‚ facts or natural objects. Symbolism can take different forms. Generally‚ it is an object
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CBSE TEST PAPER-03 CLASS - X (Chemical Reactions and equations) 1. Take about 5 ml of dil. HCl in a test tube and add a few pieces of fine granules to it. Which gas is evolved? (a) Chlorine (b) Hydrogen (c) HCl (d) Nitrogen 2. Dissolving suger is an example of(a) Physical change (b) Chemical change (c) Redox Reaction (d) None of these. 3. Heat is evolved diving (a) Endothermic Reaction (b) Displacement Reaction (c) Combustion Reaction (d) Combination Reaction 4. Which of the following is not a balanced
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complex reactions and reaction sequences‚ where raw materials react together to give the product. Such chemical process often releases energy‚ in the form of heat‚ and the reaction is described as exothermic. Many of these reactions may also evolve gases at high rates‚ and could cause reactor over-pressure. Thermal runaway reaction Runaway reactions are thermally unstable reactions where the heat of reaction can raise the temperature of the reactants sufficiently to accelerate the reaction rate out
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Elimination Reactions ________________________________________ As described previously‚ primary alkyl halides generally undergo substitution reactions with simple nucleophiles by an SN2 mechanism. Secondary alkyl halides‚ often react with simple basic nucleophiles to give a mixture of products arising from both substitution and elimination. As with substitution reactions‚ the rate at which elimination reactions proceed can be proportional to both the concentration of the base and the concentration
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Polymerization reaCTIONS polymers are high-molecular-weight compounds‚ fashioned by the aggregation of many smaller molecules called monomers. Ex. plastics that have so changed society and the natural and synthetic fibers used in clothing are polymers. Classification of polymers Homopolymers - consist of repeated long chains or structures of the same monomer unit. Ex. PVC(polyvinyl chloride) Copolymers - polymers that consist of more than one molecule. Trimers - molecules consisting
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Reaction Paper I watched this movie entitled “Real Steel”. This story revolves around the father‚ the son whom he abandoned and the robot that the boy found. After watching the movie‚ and applying the concept of leadership into it‚ I may say that the true leader is the boy and the new leader is his father. In that movie‚ the eleven year old boy was able to stand for what he believes‚ to fight for what he loves‚ to influence a person towards a goal and brings out the best in him. Though he is
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ENGINEERING Reaction Engineering CGC035 / CGC052 Problem Sheet 3 - Fluid-fluid reactions 1. The reaction rate for the heterogeneous reaction A(g) + B(l)→ products is second order according to the expression -rA=kCACB and it is relatively slow compared to mass transfer so it takes place in the bulk of the liquid. Combine the following rate expressions for diffusion through the gas and liquid films‚ -rA=kAga(pA-pAi) and -rA=kAlaCAi-CA‚ with Henry’s law pAi=HACAi and the reaction rate
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