aspects. If accepted into National Honors Society‚ I will uphold the ideals of “leadership‚ service‚ and character” through continued volunteer work‚ using the opportunity to serve others in my community‚ and use my position within the Society to be a catalyst for change. If accepted‚ I intend to uphold the leadership aspect of the National Honor Society by contributing in meaningful ways to my community. I feel as though I have created forward momentum already by getting out in my community. This is
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plant attempting to synthesise n-hexane. a) List three physical properties of alkynes. b) Give the IUPAC name of compound A. [3 marks] [2 marks] c) There are several ways to form the final product from Compound A. An operator has decided to use Pt catalyst to react with Compound A. Write the complete chemical reaction equation. [3 marks] d) The quality assurance manager of the production plant found out that the method in (c) is not very efficient and has decided to look for an alternative pathway
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Fischer Esterification – nucleophilic substitution reaction Strong acid catalyst (concentrated sulfuric acid Purpose of a reflux is to heat a reaction mixture at its boiling temperature to form products‚ without losing any of the compounds in the reaction flask TO HAVE GREAT PERCENT YIELD: As reaction is reversible‚ removal of water or the addition of an excess of one of the reactants (cheaper one) drives the reaction towards formation of ester. (Excess carboxylic acid is used) Adding excess
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A few stages in glycolysis are controlled‚ yet the most vital control point is the third step of the pathway‚ which is catalysed by a compound called phosphofructokinase (PFK). This response is the main conferred step‚ making PFK a focal focus for control of the glycolysis pathway as a whole. PFK is directed by ATP‚ an ADP subordinate called AMP‚ and citrate‚ and in addition some other molecules. ATP is a negative controller of PFK‚ which bodes well: if there is as of now a lot of ATP in the phone
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w w w e tr .X m eP e ap UNIVERSITY OF CAMBRIDGE INTERNATIONAL EXAMINATIONS General Certificate of Education Ordinary Level .c rs om 5070/11 CHEMISTRY Paper 1 Multiple Choice Additional Materials: Multiple Choice Answer Sheet Soft clean eraser Soft pencil (type B or HB recommended) October/November 2011 1 hour *0909424295* READ THESE INSTRUCTIONS FIRST Write in soft pencil. Do not use staples‚ paper clips‚ highlighters‚ glue or correction fluid. Write your name‚ Centre number and
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I) INTRODUCTION * Industrial Chemistry deals with the preparation of products from raw materials through the agency of chemical change * Chemistry is important to Industry by: * Regulating manufacturing processes * Quality Control * Research and Development * Sources of raw materials from the natural environment 1) Lithosphere –Earth’s Crust 2) Hydrosphere – Marine and Oceanic Environment 3) Atmosphere – Air 4) Plants – Biosphere * Classification of Natural
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severe depression due to the unemployment and urban discontent‚ the peasant population was increasing meanwhile the taxes rose and the arrears had grown resulting in strike in 1902-03 and assassination of the Minister of Interior‚ Plehve. The final catalyst to the revolution in 1905 was the events of Bloody Sunday. The December 1904 strike at Putilov arms works contributed to further sympathy strikes and more workers willing to strike‚ also the news of the unfortunate situation of Russia at war and
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rate of a reaction‚ and to find the order of the reaction in each reactant and write a rate equation. Background Theory: Chemical reactions occur at different rates that ultimately depend on their concentration‚ the temperature‚ the usage of catalysts‚ the nature of reactants‚ like the surface area of the particles. Concentration‚ for instance‚ increases the number of molecules or particles in a certain volume‚ so collisions will become more frequent. Temperature increases the rate by making particles
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prophesies‚ and in the ³air-drawn² dagger that guides Macbeth towards his victim. Of the supernatural phenomenon evident in Macbeth the witches are perhaps the most important. The witches represent Macbeth¹s evil ambitions. They are the catalyst which unleash Macbeth¹s evil aspirations. Macbeth believes the witches and wishes to know more about the future so after the banquet he seeks them out at their cave. He wants to know the answers to his questions regardless of whether the
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manganese dioxide‚ had a greater reaction than the other test tube. Which simply contained 10 mL of 3% hydrogen peroxide. The factor that affected the reaction rate was that the manganese was seen as a catalyst. The reason collision theory relates to this experiment is due to the fact that the catalyst creates a higher activation energy and this causes more collisions‚ which increases the reaction rate. In the second experiment‚ the Alka Seltzer tablet was
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