Chemistry 217 Dr.Rudolf Rednose Tues/8am/S-473 Determining the Percent Oxygen in the Air INTRODUCTION: Recent tragedies in coal mines have exemplified the importance for us humans to breathe an adequate amount of oxygen if we are to survive. But what amount of oxygen is adequate? How can we know the amount of oxygen present in what we consider fresh air? The purpose of this experiment was to determine the percent oxygen typically present in air. The conclusion of the test suggested that
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I am one of the 99% The fact is all but that little 1% is one of the 99%. Does that mean that I need to march down the streets of different cities to tell everyone that I am one of the 99%‚ camp out for months at a time and take the charity of others‚ so that I can proclaim the fact that I am like 99% of the nation? I think not. 1% of the world controls most of the money and then the other 99% share in what is left. Between 2002 and 2007‚ the income of the 1% increased at least 10 times faster
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Five Percent Nation: The Non-Ascribed Faith The Five-Percent Nation is a revisionist movement in America that began in 1964. It borrows the philosophies from the traditional Islam. In addition‚ the Five percenters otherwise‚ known as Nation of G-ds’ and Earths‚ resulted from the departure of the Nation of Islam in 1963. Although they are a sole religion‚ the Five Percent Nation does not consider themselves a religion‚ but merely a religious affiliation‚ followed by Islāmic tradition defined as “culture”
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than the weight of the crude caffeine. Explain why the percent recovery is frequently low. • Crude caffeine contains contaminants‚ such as organic compounds‚ while purified caffeine is just pure caffeine. Therefore‚ the weight of the crude caffeine is more than the purified caffeine because of the additional contaminants adds weight. Since there are no additional contaminants to the purified caffeine‚ the percent recovery would be low. The percent recovery would also be low since the caffeine is pure
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Percent Acetic Acid in Vinegar Introduction: Acetic acid is reactive when combined with calcium carbonate. In this lab‚ we will use vinegar for its acetic acid and egg shells for their calcium carbonate. Marketable vinegar differs in its acetic acid concentration from 4-6%. Calcium carbonate reacts with the acetic acid in vinegar to produce carbon dioxide‚ water‚ and calcium acetate as represented by the equation: CaCO3 + 2HC2H3O2 CO2 + H2O + Ca(C2H3O2)2. The calcium carbonate reacts with
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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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One Direction isn’t an Inspiration? People think that One Direction is just a boy band. They may call them gay. They may call them stupid. They may call them untalented. They may call them idiots‚ but have they ever realized that they aren’t just singers. People don’t see the point in these boys. All they see is the face‚ not the background. All they hear is the music‚ not the lyrics. All they feel towards these boys is hate and dislike. But none of them realize‚ these boys have saved more lives
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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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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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