Reaction Rate Coursework Aim To see how the concentration of a reactant affects the rate of reaction‚ in this case sodium thiosulphate and acid. Scientific Background For a reaction to occur‚ the particles of the reactants must be colliding with each other with enough energy‚ the amount of energy needed for the reaction is called activation energy. Activation energy is altered by temperature‚ concentration‚ surface area of and the pressure on the reactants. Stirring the reactants also increases
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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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would be preferred? Why? 2. Risk analysis Solar Designs is considering an investment in an expanded product line. Two possible types of expansion are being considered. After investigating the possible outcomes‚ the company made the estimates shown in the following table: | |Expansion A |Expansion B | |Initial investment |$12‚000 |$12‚000 | |Annual rate of return
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Singapore Tax Rates and Income Tax System Introduction Singapore’s is one of the world’s biggest economies. Since the global financial crisis and more recently‚ the Eurozone sovereign debt crisis and the downgrading of the US credit ratings‚ many global and local investors has sought Singapore as a new safe haven for investing their wealth in and setting up businesses and regional headquarters. In 2010‚ Singapore’s economy has rebounded close to 15% year on year. Singapore‚ due to its
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edu/~irelandp/ec261.html Chapter 5: The Behavior of Interest Rates 1. Loanable Funds Framework Demand Curve Supply Curve Market Equilibrium 2. Changes in Equilibrium Interest Rates Shifts in Demand Shifts in Supply Example: Interest Rates and the Business Cycle By studying Mishkin’s Chapter 4‚ we learned how interest rates could be measured for a wide variety of credit market instruments. But what economic factors serve to determine these interest rates in the first place? To answer this question‚ we will
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Development (SPPRED) in the Republic of Azerbaijan for 2003-2005. Implementation of that State Program in 2003-2005 resulted in maintaining overall macroeconomic stability‚ ensuring dynamic economic growth and upholding inflation and national exchange rates at appropriate levels. In its turn these achevements promoted to implementation of substantial activities aimed at solution existing social probelms as well as tackling poverty. So the poverty level consequently came down from 46.7% in 2002 to 29.3%
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The Environmental Lapse Rate Exercise A (Total = 12 marks) The heights of the temperature °c measurements are given in meters (m) Convert each of these to the appropriate height in Hectopascals (hPa): Height (m) Temperature°c Hectopacals (hPa) 0 22 1000 1500 18 850 3000 13 700 4000 7 600 5000 -15 500 6000 -22 400 7000 -36 300 8000 -41 200 8500 -49 150 9000 -58 100 a) Plot a simple graph to display these data (3 marks): see attached b) what does the graph tell you about
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Statistics suggest that in 2050 50% of the population will be obese. It is claimed that by 2050 half the population of the United Kingdom will be obese. This is a frightening statistic for Government‚ health professionals and individuals. The National Institute for Health and Clinical Excellence (NICE) has stated that Obesity can contribute to a range of problems‚ including heart disease‚ type 2 diabetes‚ osteoarthritis and some cancers. 1 Obesity is caused by primarily eating too much and
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| ADVANTAGES OF DEPARTMENTAL STORES | | 1. The departmental store provides all facilities under one roof to enable the customer to by all his requirements. 2. The central location attracts a good number of customers which increases the sales turnover. 3. Large variety of goods is stored. This has a special appeal to the customers. 4. The financial strength of departmental store enables it to have experts in all sections. 5. Centralized buying helps them to get merchandise at lower cost together
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student characteristic variables: age‚ gender‚ ethnicity‚ academic intent‚ and financial aid eligibility. Five enrollment and registration (predictor) variables were also studied: when students enrolled‚ number of changes made to their course schedule‚ how many schedule changes were drops and how many were adds‚ and when changes were made. It explores three outcomes: fall semester grade point average‚ fall semester course completion‚ and attrition (whether the students enrolled for the spring semester)
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