Title Causes and effects of skin bleaching Problem Statement What are the factors that influence teenagers ages 14-16 to partake in skin bleaching? Reason for Selecting Area of Research The topic was chosen by the researcher because he thinks that skin bleaching is downgrading and is an unhealthy activity. Based on observation carried out within the school and outside of the school it has been noticed that a wide range of students participate in this activity which causes the
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Structure Bonding and Chapter In Context In this chapter and the next, we examine chemical bonding in detail. We examined ionic bonding briefly in Chapter 2 and will do so in more detail in Chapter 11. We will also examine intermolecular forces in detail in Chapter 11. Here we will apply what you have learned about atomic structure (Chapter 6), electron configurations, and periodic trends (Chapter 7) to the chemical bonds formed between atoms and ions and the shapes of molecules and ions that contain
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Title: The effect of the concentration of hydrogen peroxide on the rate of reaction of catalase from potato Focus question: How will the concentration of the substrate hydrogen peroxide affects the rate of reaction of the enzyme catalase. Apparatus/Materials: Goggles, Lab coat, Potato, Core, 100mL beaker, Hose and stopper, Different concentrations of hydrogen peroxide (3.0%, 6.0% and 9.0%), Gas collecting tube Variables: Dependent variable: (1) rate of oxygen production Independent variable:
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* IONIC BONDING * With a sodium atom (NA) and a chlorine atom (CL) the sodium atom has a outer most shell of 1 electron and 7 vacancies. With chlorines outer most shell having 7 electrons and 1 vacancies, the 1 electron from the sodium atom will be stolen by the chlorine to satisfy both outer most shells of both atoms. * Because sodium has one more positive proton than negative electron it has a positive charge (+ion) and chloride has a – charge because it has an extra negative electron
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Chlorination of an Alchohol Results The final product was 2-chloro-2-methylbutane and its yield was 2.48 grams (MW: 106.5 grams). Weight of 3-methyl-2-butanol: 3.92 grams (MW: 88.15 grams). Theoretical yield: 3.92g alcohol x 1 mol alc. x 1 mol product x 106.59 g prod. = 4.74 grams product 88.15 g alc. 1 mol alc. 1 mol prod. Percent yield: 2.48 grams product (experiment yield) x 100% = 52.3% 4.74 grams product (theoretical yield) Discussion
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involves a larger enthalpy change than does a chemical change. 2. True 3. False: The potential energy of the products is smaller than the potential energy of the reactants in an exothermic change. 4. True 5. False: An endothermic reaction absorbs heat from the surroundings. 6. True 7. True 8. False: Three-quarters of a radioisotope will have changed after two half-lives. 9. False: In an endothermic reaction, only the potential energy of the chemical system increases. 10. True 11. (b) 12.
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Product Name : DCBA Stage code : ABCD There are two reactions involved in the process. The first reaction is reaction between dhercdacetic and bromo amine. The reaction takes place at room temperature. To monitor the unreacted dhercdacetic and the product conversion there are few challenges because of which in process checks are not in place. After completion of the reaction, the bromoamine solution is distilled out and chased with water distillation to get the dhercdbromo in water.
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A Kinetics Experiment The Rate of a Chemical Reaction: A Clock Reaction Andrea Deoudes February 2, 2010 Introduction: The rates of chemical reactions and the ability to control those rates are crucial aspects of life. Chemical kinetics is the study of the rates at which chemical reactions occur, the factors that affect the speed of reactions, and the mechanisms by which reactions proceed. The reaction rate depends on the reactants, the concentrations of the reactants, the temperature at which the
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|IUPAC SYSTEM OF NAMING COMPOUNDS |SUBSTITUENTS | |Select the longest continuous chain of carbon atoms for the basic name. |F- | |Number the carbons in the chain from the end nearest the first branch (to give |fluoro |
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University of Phoenix Material What Is Life? Summer Pigg BIO/101 9/28/2015 Brandy Mcfadden Read each statement. Write a 100-word summary explaining how that media piece supports that statement and include APA formatted references for each media piece. 1. Find a media piece—article, video, presentation, song, or other—related to the scientific method, creating hypotheses, or designing experiments. Include the reference
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