and placed in the oven for 30 minutes. After the completion of the thirty minutes‚ 0.150 g of shiny magnesium turnings and a stir bar was first added to the round bottom flask and the claisen adapter along with the drying tube packed with calcium chloride was added to one of the heads of the claisen adapter. A rubber septum was then added to the other head and the entire apparatus is placed on a hot plate at its lowest setting. Meanwhile‚ 20 ml of anhydrous diethyl ether was added to a 50 ml Erlenmeyer
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esterification reaction that was carried out in this lab is shown in figure 1. It worth mentioning that the by-product of such reaction is water. In organic chemistry‚ the reaction in which water molecule is released is known as condensation reaction (Hornback‚ 2006). Figure1 is drawn using Chem Sketch software. a) b) Figure 1: Typical Fischer esterification reaction (a) in comparison to the specific esterification reaction used in this lab (b) The reaction can also be categorized in terms of
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Satellite Services 5. Strong Growth in Free Cash Flow 6. Share Repurchase Wireless Unit The earnings growth of the wireless unit is expected to reach mid-teens partially attributed to the acquisition of Dobson Communications. By acquiring Dobson‚ AT&T expects to possibly gain 13 million customers in 17 states. (3)Also‚ a growing wireless subscriber base and wireless data revenues propelled by the exclusive iPhone contribute to earnings expectations. The Operating Income Before Depreciation and Amortization
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Flame lab test Chemistry Introduction The lab test performed was to determine characteristic colors that were produced by specific metallic ions that are shown in a flame. This happens when an electron gains energy; the electron moves from an energy level that’s farthest away and to an empty orbital close to the nucleus with higher levels‚ so one of the electrons gives off energy. A flame test is a visual test where the energy is in the form of a color change and the change can
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Lab: investigating hooked law with springs Purpose: to find spring constants of different springs using the slope of a graph of change in heights vs. the weight force. Also‚ to be able to understand how spring constants change when you add springs in a series or paralle Pre lab predictions: We predicted that the graph of gravitational force (mg) as a function of stretch (delta x) would look like Data: Spring #1: y = 8.2941x + 0.0685 This table represents the different distances that
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Chapter 10 Discussion Questions |10-1. |How is valuation of any financial asset related to future cash flows? | | | | | |The valuation of a financial asset is equal to the present value of future cash flows. | | |
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LAB REPORT Introduction: In a chemical change‚ the identities of substances change and new substances form. In an equation the substances on the left are the reactants. The substances on the right are the products. In this experiment the objectives are to observe evidence that a chemical change has taken place. Infer from observations that a new substance has been formed. Identify and record observations that show energy is involved in chemical change observe the color‚ solubility of some substances
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Flame Lab Objective: How an electron absorbs energy and re-emits it as light and why different elements have different spectra. Also to learn how to use flame tests to determine the identity of unknown mixtures. Hypothesis: We know that certain compounds will burn certain flame colors because they emit different wave lengths. Introduction: Neils Bohr made the “Bohr’s Model” in 1922‚ he found that electron travel in specified fields – which‚ when excited‚ will jump to different rings
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Love has no gender Everybody should have the right to a legally recognized union with a partner of their choice. The debate over whether or not people in same sex relationship should be allowed to marry‚ or even enter into civil unions is no new fight. Legalizing gay marriage has brought a new trend which then providing the arguments on supporting gay marriage such as denying them is a violation of religious freedom and minority discrimination encourages people to have strong family values and constitute
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Rhino Poaching facts: A total of 158 rhino have been poached since the beginning of the year. In the Kruger National Park‚ 116 rhino had been poached‚ the department of environmental affairs said in a statement. Thirteen were poached in North West‚ 12 in KwaZulu-Natal‚ nine in Mpumalanga and eight in Limpopo. Sixty-one people had been arrested: 38 of them alleged poachers and three alleged couriers‚ the department said. In the past week‚ two poachers were arrested in the KNP. Nine people had
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