Changing the Rate of Reaction PART 1: PARTICLE SIZE Question: How does changing the particle size of marble (CaCO3) affect the rate of reaction when it is added to hydrochloric acid (HCl)? Hypothesis: If I change the particle size of marble to test how to change the rate of a chemical reaction‚ than the chemical reaction with the smallest marble particles will produce CO2 the quickest because the larger the surface area‚ the more place the hydrochloric acid will have to collide with the marble
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“In 1986 DNA was first used in a criminal investigation in england (hirby‚ https://www.thelawdictionary.com).” “One year later‚ DNA was first used in the USA in Florida (hirby‚james https://www.thelawdictionary.com/).” “In 1985 a professor at the University Alee Jeffrey’s was able to validate the uniqueness of personalized DNA material in each person’s skin‚ body fluids‚ blood‚ nails and hair (hirby‚ james https://www.thelawdictionary.com/).” Once DNA testing was used to convict criminals law enforcement
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Investigation of the Stroop effect Anonymous The current study focused on the Stroop effect‚ which is the observation that it takes longer to name the colour of the ink in which a word is printed if the word spells a different colour than it does to identify a block of colour‚ It involves the use of automatic and controlled processes. The Stroop effect was tested on participants who were part of a repeated measures groups design‚ there were two males and two females aged
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This force of agents was later named the Bureau of Investigations by
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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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Unit 8 Essay Malcolm Johnson Fraud Investigation CJ125 Prof. Ayers 9/23/2012 Fraud Examination and auditing are very much related‚ but is not the same thing. Because most occupational frauds are financial crimes‚ there is necessarily a certain degree of auditing involved. A fraud examination involves a lot more than just a review of financial records. Other than a review of financial information a fraud investigation involves interviews‚ statement analysis‚ and also public record searches
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Bacon‚ Toast‚ Sodium Nitrate and Potassium Bromate For Breakfast Samuel Martino Have you ever looked at the ingredients on the side of a food package? There is a lot more than the main food in the package. Usually it has real food then several different chemical compounds and preservatives listed behind the real stuff. In some foods the ingredients include chemical compounds as sodium nitrate and potassium bromate. Sodium nitrite is an ionic compound and is identified by the chemical formula
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an electric current‚ especially if it can’t. 4.) Pick an area of science that interests you and describe how the concept of electrolytes is used in that particular field. In physiology‚ all higher life forms require a complex electrolyte balance between the intracellular and extracellular environment. In particular‚ the maintenance of osmotic gradients of electrolytes is important. Such gradients affect and regulate the hydration of the body‚ blood pH‚ and are critical for nerve and muscle function
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Reagents used: Distilled Water Hydrated Sodium Borate 1.0 M Hydrochloric acid Screened methyl orange Sodium Borate solution Method: Prepare a standard solution of hydrated sodium borate (250cm3 solution) Place the weighing bottle on the balance and record the mass of the empty bottle. Add approximately 4.80 grams of the hydrated sodium borate compound into the weighing bottle and record their weight together. Transfer the measured hydrated sodium borate to the 250 cm3 beaker then find the
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“MOTIVATION” Filipino people are religious human being. We usually seek for guidance from our Lord in every decision we will made so in relation to that our teacher decided to have a speaker that can motivate us spiritually‚ emotionally and to enlighten us by a word of god. Fr. Joel Eslabra was the 1st invited speaker. He is a priest who is willing to share the word of God and also can give us inspiration. Fr. Joel starts his discussion with an inspirational lecture about the word of god presented
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