definite proportion through determining percentage composition of each element in Magnesium oxide. I hypothesized that the composition mass of magnesium will be more than oxygen and this would be the result for other groups as well. My null hypothesis was that if the experiment is done accurately‚ the percentage composition of magnesium shouldn’t exceed 65%. Material: -Refer to lab manual on page 180 in Nelson Chemistry 11. -The following revisions were made: -Nickel crucible and lid was used
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If you were given all the money you would ever need‚ and were free to do absolutely anything with your life‚ what would you choose to do and why? If I was fortunate enough to have me financial needs guaranteed‚ I would concentrate on my short term goal of getting an education on in engineering and thus prepared‚ move on to my long term goal of becoming an entrepreneur in a twin field of software design and robotic. The great cities of North America are rusting out and we need new industry to create
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I. Definition A two-way chart which describes the topics to be covered by a test and the number of items or points which will be associated with each topic. A blueprint for an objective selected response assessment. II. Purpose 1. To coordinate the assessment questions with the time spent on any particular content area‚ the objectives of the unit being taught‚ and the level of critical thinking required by the objectives or state standards. 2. To identify the achievement domains being measured
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For the percentage yield is 39.08% which is less than and not 100%‚ by this‚ it can be concluded that the reaction is non-stoichiometric. The low yield can be explained by the following ways: The presence of reversible reaction-for the reaction between ethanol and ethanoic acid‚ it is reversible and which is only considered to be irreversible for simplicity of calculations. For reversible reaction like this‚ the ethanol and ethanoic acid will not be totally converted to ethyl ethanoate but until
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To determine the percentage by mass of Calcium carbonate in an egg shell Aim: is to find and work out the percentage of calcium carbonate by mass in eggshells by using acid base “back titration” Introduction: Calcium Carbonate‚ CaCO₃‚ is a compound which is polymorphic and therefore means that it can be found in a variety of different objects or organisms. For example: Rocks (limestone‚calcite)‚ sea snail shells‚ Eggshells‚ pearls and many more. This investigation will focus on finding out the
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Number: G621 Assignment Title: Finding the Percentage of Copper in a Brass Alloy Assignment: G620 Sample Assignment C Date Set: Due Date: Assessment Objective(s): AO3 Vocational Brief: Brass is an alloy of copper and zinc. This alloy has many uses ranging from coinage to non-ferrous fittings on ships. Many domestic taps use brass where contact with water occurs. You are provided with a sample of brass which is about 150 years old and you are asked to quantitatively analyse it‚ using
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by day everything becomes so familiar that sometimes he may have a feeling that even a household object is somehow similar to his personality. What if a witch suddenly appeared and made him choose a household object to be turned into? In my case‚ I would choose to be a knife. The explanation for my choice is divided into 2 parts: the first one is about spending time getting used to something or someone‚ and the second one is about discovering the internal side of people. First of all‚ it always takes
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Embedded Assessment 2.1 How would you feel if you lived in a dystopian society instead of living in modern day society? Today in the world there are places where people have freedom and books that have societies that are like today but very different. There can be societies in the world that can be like the books. Why are they different? Dystopian societies have more have more laws to control their society. Look and read the differences and similarities of a dystopian and modern day society
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Identification of a Hydrate Based on Percent Water Varun Wadhwa 11/19/12 Introduction The identity of an unknown hydrate was determined by massing the hydrate before and after heating and calculating the percentage of water. Procedure First‚ we cleaned‚ dried and heated an evaporating dish for five minutes on an iron ring with the Bunsen burner and massed it. Then‚ we added 2 grams of an unknown hydrate and calculated the mass of that. Next‚ we used gradually increasing heat for
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How Would You Describe Yourself? I am punctual‚ dependable and can be counted upon to finish what I start. I get a great deal of satisfaction from knowing that I have done something well and on time. For example‚ at my present job‚ I was given different work orders every day. It was my responsibility to finish the orders and make sure they all met quality and safety standards within a specific deadline. On occasion‚ I had to familiarize myself with the product and the production process. I was
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