Benito Cereno Book Report essays

Benito Cereno Book Report essays In Benito Cereno by Herman Melville, the author offers a warning about the dangers of slavery, and the future problems slavery could cause America. By telling the story of a slave revolt on a Spanish ship, Melville shows how prejudices affect a persons perception of the world around him. Through writing most of the story from the viewpoint of the main character, Captain Amasa Delano of Duxbury, Massachusetts, Melville demonstrates how prejudices can limit ones perspective and understanding. Although Captain Delano is an honest and kind person, he cannot perceive the world realistically because he believes that blacks are nothing more than property. Captain Delanos inability to recognize his prejudices or to learn from his experience in the slave revolt make him a symbol of what Melville fears will happen to America. The story opens in the early morning of August 1799, off the coast of Chile, aboard an American sealing ship called the Bachelors Delight and under the command of Captain Amasa Delano. Melville describes Delano as a benevolent optimist who has a singularly undistrustful good nature and does not like to believe that man is capable of evil. However, Delano is also described as a blunt thinker and a simple man incapable of irony. While Delano is described as such a definite thinking person, Melville depicts the morning as unclear and blurred. The sea is filled with a gray mist and the color of the sky, water and birds all seem gray. Thus, the reader knows that the indefiniteness of the day and its haziness will confuse Delano and prevent him from seeing clearly. Finally, the presence of shadows adds further mystery to the morning, which Melville says, foreshadow deeper shadows to come. The oddness of the day continued when Delano spotted a ship without a flag, which usually indicated that it was a pirate ship. However, based upon how the ship wa...

Calculating Limiting Reactant of a Chemical Reaction

Calculating Limiting Reactant of a Chemical Reaction Chemical reactions rarely occur when exactly the right amount of reactants will react together to form products. One reactant will be used up before another runs out. This reactant is known as the limiting reactant. Strategy This is a strategy to follow when determining which reactant is the limiting reactant.Consider the reaction:2 H2(g) O2(g) → 2 H2O(l)If 20 grams of H2 gas is reacted with 96 grams of O2 gas, Which reactant is the limiting reactant?How much of the excess reactant remains?How much H2O is produced? To determine which reactant is the limiting reactant, first determine how much product would be formed by each reactant if all the reactant was consumed. The reactant that forms the least amount of product will be the limiting reactant. Calculate the yield of each reactant. To review, follow the strategy outlined in How to Calculate Theoretical Yield. The mole ratios between each reactant and the product are needed to complete the calculation:The mole ratio between H2 and H2O is 1 mol H2/1 mol H2OThe mole ratio between O2 and H2O is 1 mol O2/2 mol H2OThe molar masses of each reactant and product are also needed.molar mass of H2 2 gramsmolar mass of O2 32 gramsmolar mass of H2O 18 gramsHow much H2O is formed from 20 grams H2?grams H2O 20 grams H2 x (1 mol H2/2 g H2) x (1 mol H2O/1 mol H2) x (18 g H2O/1 mol H2O)All the units except grams H2O cancel out, leavinggrams H2O (20 x 1/2 x 1 x 18) grams H2Ograms H2O 180 grams H2OHow much H2O is formed from 96 grams O2?grams H2O 20 grams H2 x (1 mol O2/32 g O2) x (2 mol H2O/1 mol O2) x (18 g H2O/1 mol H2O)grams H2O (96 x 1/32 x 2 x 18) grams H2Ograms H2O 108 grams O2O Much more water is formed from 20 grams of H2 than 96 grams of O2. Oxygen is the limiting reactant. After 108 grams of H2O forms, the reaction stops. To determine the amount of excess H2 remaining, calculate how much H2 is needed to produce 108 grams of H2O.grams H2 108 grams H2O x (1 mol H2O/18 grams H2O) x (1 mol H2/1 mol H2O) x (2 grams H2/1 mol H2)All the units except grams H2 cancel out, leavinggrams H2 (108 x 1/18 x 1 x 2) grams H2grams H2 (108 x 1/18 x 1 x 2) grams H2grams H2 12 grams H2It takes 12 grams of H2 to complete the reaction. The amount remaining isgrams remaining total grams - grams usedgrams remaining 20 grams - 12 gramsgrams remaining 8 gramsThere will be 8 grams of excess H2 gas at the end of the reaction.There is enough information to answer the question.The limiting reactant was O2.There will be 8 grams H2 remaining.There will be 108 grams H2O formed by the reaction. Finding the limiting reactant is a relatively simple exercise. Calculate the yield of each reactant as if it were completely consumed. The reactant that produces the least amount of product limit the reaction. More For more examples, check out Limiting Reactant Example Problem and Aqueous Solution Chemical Reaction Problem. Test your new skills by answering  Theoretical Yield and Limiting Reaction Test Questions. Sources Vogel, A. I.; Tatchell, A. R.; Furnis, B. S.; Hannaford, A. J.; Smith, P. W. G. Vogels Textbook of Practical Organic Chemistry, 5th Edition. Pearson, 1996, Essex, U.K.Whitten, K.W., Gailey, K.D. and Davis, R.E. General Chemistry, 4th Edition. Saunders College Publishing, 1992, Philadelphia.Zumdahl, Steven S. Chemical Principles, 4th Edition. Houghton Mifflin Company, 2005, New York.