1. A student neglected to add sodium carbonate when extracting the tea leaves with hot water. Yet a very high yield of caffeine was obtained. The crystals melted at 202-214°C. Explain. • The sodium carbonate is supposed to be added when extracting the tea leaves with hot water in order to help purify the caffeine. So since the student neglected to add sodium carbonate the caffeine won’t be pure but the student would still be able to recover a large amount of caffeine. The literature melting point
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or not‚ it is still unethical. In June of 2001 six former and current female Wal - Mart employees filed a sexual discrimination suit against the company. The lawsuit alleged that Wal - Mart failed to provide equal employment for women. Seventy percent of the workforce was comprised of females but only a very small percentage of the females were in management positions. “Wal - Mart is the nation’s largest employer of women but‚ unfortunately they are being treated without dignity and respect.”
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Purpose: To find out the percent yield of copper in the reaction between copper sulfate (CuSO4) and Iron (Fe). Materials: Balance 100-mL beaker 250-mL beaker Bunsen burner Copper sulfate crystals Glass stirring rod 100-mL graduated cylinder Iron filings Ring stand and ring Wire gauze Procedure: 1. Record mass of clean 100-mL beaker. 2. Add 8.0 grams of copper sulfate crystals to beaker. 3. Add 50.0 milliliters of distilled water to the crystals. 4. Put wire gauze on ring on ring
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Determining The Percent Copper and Zinc in Pennies From Density Purpose: Practicing determine the density of the solution. Developing the method for determine the percent of density for the solution. Examining the linear relationship by learning to use the best-fit straight line. Using the linear relationship to determine the percent of density by the solution. Be familiar with recording data and observations. Methods & Material: Methods: Weight the mass for the different percent of zinc and
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Down with the Top Ten Percent Many colleges try to have a racially diversified environment by using affirmative action. Some colleges used the point system which would give an edge to minorities over Caucasians. The supreme court of Texas prohibited colleges to use affirmative action. When affirmative action was prohibited‚ minority enrollments at colleges decrease. To racially diversify colleges‚ Legislature passed the top ten percent rule. The top ten percent rule states any high school
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In the data table above‚ the mass of penny‚ copper‚ and zinc was needed in order to determine the percent composition of copper and zinc. The mass of penny was taken on the scale in the beginning of the procedure before anything was done to the penny‚ and it was 2.51 grams. After the reaction with the hydrochloric acid and drying the copper‚ the mass is 0.35 grams. To get the mass of zinc‚ the mass of the penny was subtracted by the mass of copper. The mass of zinc is 2.16 grams. The penny is 14%
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Business English Dictionary is a store that sell foods and sometime other goods but the size is typically below supermarket. 99 Speedmart is convenience store that based in Malaysia and they have over 300 outlets around Klang Valley. Three distribution centers have been set up to smooth their logistics and the latest distribution is located at Balakong Jaya. However‚ 99 Speedmart is not a solo-player in retailing market. Connivance stores chains like 7-11 Malaysia‚ KK Mart and Hypermarket chains
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According to the 55-data collected with the result in a response rate of 100 percent‚ there are some respondents agree while the others disagree as will be discussed by being break down according to its variable. First construct is system usefulness. This variable consists of eight questions as shown in Table 3.1. Based on data in figure 3.1‚ the result on the first question shows that 6 out of 55 (11%) are feeling very satisfied with the ease of using this system‚ 10 out of 55 (18%) are satisfied
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Before I wrote this essay‚ I searched for images of excessive perspiration. During my search‚ I discovered there were various outlooks on the topic‚ but two prominent images caught my eye. One of the images feature a woman‚ who appears to be resting after a workout. The other image shows a man‚ who looks like he is taking a break from work. Both images illustrate different types of individuals with the same condition‚ but the first image would be considered more appealing than the other image. The
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We are the 99% The Occupying Wall Street protest has been an ongoing protest since September 17‚ 2010. (Huffington Post – Pg. 1) These people protesting believe that the United States is being treated unfairly with Economic inequality‚ high unemployment‚ greed‚ corruption‚ and financial services. Myself personally am torn between the two on taking sides. I cannot find it in my heart to say that the single parents that just lost there job and can’t feed their family deserves it. I do believe it
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