Life Off-Line When my family’s Internet provider had some mechanical problems that interrupted our service for a week‚ my parents‚ my sister‚ and I thought we would never make it‚ Getting through long evenings without streaming movies‚ emails‚ twitter updates‚ and internet searches seemed impossible‚ We soon realized‚ though‚ that living off-line for a while was a stroke of good fortune. It became easy for each of us to enjoy some activities alone‚ to complete some postponed chores‚ and to spend
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Drivers First Offense of DUI Deserves Jail Time American InterContinental University Abstract I have been thinking so much about life and things that happen. I think about all the car accidents that have happened. I think about how many people think its ok to drink or take drugs and then drive because they feel they are fine. They take the decision into their own hands to decide to get behind the wheel not honestly knowing if they are for sure okay to drive or not. I feel that if you are the
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Art of an Islet By Aisaia Jay Toral When the dark mantle of being forlorn had been laid in the sky for some time now‚ it covered the sun rays that give hope to the saddened heart. However‚ as I became used to it‚ this fear turned out to be my advantage to find courage and confidence and to know myself well. They say life is hard meant to be enjoyed. They claim life is unjust. They pronounce no one is an islet. But they were all wrong. In my own perspective‚ life is easy to enjoy‚ fair enough
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Where my love begins. Love is a gift from heart to heart. It begins at the friendship and heartfelt love. This is a story about a place where a boy and a girl love each other so much. A long time ago‚ there are a girl and a boy who left their lovely country for another place. They lived in Grand Canyon. It is a beautiful place‚ and it is also one of the seven wonders of the world. When you come here‚ you will be relaxed and have a quite life. A boy met with a girl in there. Her name is Linh
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United States make coupon payments semiannually‚ bonds issued elsewhere often have annual coupon payments. Suppose a German company issues a bond with a par value of $1‚000‚ 25 years to maturity‚ and a coupon rate of 6.4 percent paid annually. If the yield to maturity is 7.5 percent‚ what is the current price of the bond? A: C=1000*6.4%= 64 bond
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Stoichiometry of a Precipitation Reaction Purpose: The purpose of this lab is to calculate the theoretical‚ actual‚ and percent yield of the product from a precipitation reaction. Also‚ to learn concepts of solubility and the formation of a precipitate. Procedure: Weigh out your 1.0g of CaCl2-2H20 and put it into the 100mL beaker‚ Add your 25mL of distilled water and stir to form the calcium chloride solution. Next‚ use stoichiometry to determine how much Na2CO3 and put it into a small
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2-dibromo-1‚2-diphenylethane | 0.204g | Diphenylacetylene | 0.087g | Theoretical yield | 0.107g | Percent yield | 81.3% | Melting point range of diphenylacetylene | 57- 60°C | Average melting point | 58.5°C | Average literature melting point | 60.0°C | Percent error of melting point | 2.5% | Calculations: Theoretical yield: Limiting reagent (LR) x M.W. (LR) x Mole to Mole ratio x M.W. (product) = Theoretical yield of product. 0.204g 1‚ 2-dibromo-1‚ 2-diphenylethane x (1mol 1‚ 2-dibromo-1
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Introduction The objective of this project was to prepare tin tetraiodide through the following reaction: Sn+2I2∆SnI4 and to measure the melting point of tin tetraiodide. Tin tetraiodide was recrystallized after the synthesis. The percent yield and the theoretical yield of tin tetraiodide were calculated. Recrystallization is to further improve the purity of tin tetraiodide. The solvent is carefully chosen to be toluene in order to maximize the recovery of tin tetraiodide during recrystallization.
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consumed. • Excess Reactant – will not be totally consumed; will have left over. • The maximum amount of product (theoretical yield) that can be obtained in a chemical reaction is based on the limiting reactant. – Need to fully “GRASP” Example 3 • Consider the reaction: 2Sb (s) + 3I2 (s) → 2SbI3 (s) Determine the limiting reactant and the theoretical yield (in grams) when 1.20 g of Sb and 2.40 g I2 are mixed. What mass of excess reactant is left when the reaction is complete?
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Copper(II) oxide will be synthesized from a known mass of copper(II) sulfate pentahydrate. Using the relationship of the balanced equation‚ and other stoichiometry relationships‚ you will calculate a theoretical yield of CuO‚ and your actual yield. You then will calculate a percent yield. Copper(II) sulfate pentahydrate will be dissolved in water and reacted using a double replacement reaction with sodium hydroxide. The addition of hydroxide ions to a solution containing copper(II) ions results
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