Theoretical Yield Example Problem - Chemistry Homework

This example problem demonstrates how to predict the amount of product produced from a given amount of reactants. Problem Given the reactionNa2S(aq) 2 AgNO3(aq) → Ag2S(s) 2 NaNO3(aq)How many grams of Ag2S will form when 3.94 g of AgNO3 and an excess of Na2S are reacted together? Solution The key to solve this type of problem is to find the mole ratio between the product and the reactant.Step 1 - Find the atomic weight of AgNO3 and Ag2S.From the periodic table:Atomic weight of Ag 107.87 gAtomic weight of N 14 gAtomic weight of O 16 gAtomic weight of S 32.01 gAtomic weight of AgNO3 (107.87 g) (14.01 g) 3(16.00 g)Atomic weight of AgNO3 107.87 g 14.01 g 48.00 gAtomic weight of AgNO3 169.88 gAtomic weight of Ag2S 2(107.87 g) 32.01 gAtomic weight of Ag2S 215.74 g 32.01 gAtomic weight of Ag2S 247.75 gStep 2 - Find mole ratio between product and reactantThe reaction formula gives the whole number of moles needed to complete and balance the reaction. For this reaction, two moles of AgNO3 is needed to produce one mole of Ag2S.The mole ratio then is 1 mol Ag2S/2 mol AgNO3Step 3 Find amount of product produced.The excess of Na2S means all of the 3.94 g of AgNO3 will be used to complete the reaction.grams Ag2S 3.94 g AgNO3 x 1 mol AgNO3/169.88 g AgNO3 x 1 mol Ag2 S/2 mol AgNO3 x 247.75 g Ag2S/1 mol Ag2SNote the units cancel out, leaving only grams Ag2Sgrams Ag2S 2.87 g Ag2S Answer 2.87 g of Ag2S will be produced from 3.94 g of AgNO3.

Reflection Essay Example - 1084 Words

Sometimes an experience can influence a person’s attitude towards a subject. Some of these experiences may include events, music, media, a conversation, or literature. This summer I read a mandatory book that changed my perspective. Before reading the book Start Something That Matters by Blake Mycoskie, I believed that a person should only set fairly easy and attainable goals for themselves. Now my attitude is that you should pursue what makes you happy, and you shouldn’t let struggles stop you. When I read examples about following a passion, overcoming a fear, and being persistent in your efforts, my prior opinion began to change. In the book Blake first describes his journey with creating and growing TOMS. Blake was on a vacation†¦show more content†¦She had to work with a printer that wasn’t very professional; she had to ask for two very large loans from the bank; she had to battle in court with her publisher; and she had to struggle with being in $60,000 of debt. All of these road blocks frightened Pam; and she had many opportunities where it would have been easier if she gave up. Despite this, Pam proceeded in advancing her dream. She eventually overcame the barriers in her way and sold 1.4 million copies of her book. Pam is a prime example of not letting the obstacles in your way stop you. As I read her story I realized the reason we don’t dream big is because of our fears. We are scared of all the possibilities that could get us down. And I think that those possibilities are all real, and they are all present, but if you care enough about your mission, then I believe the possibilit ies are all beatable as well. The last section of the book that had a major impact on my attitude was the creation of â€Å"method† cleaning products. Two friends created the more natural and environmental cleaning solutions after they saw the â€Å"toxic and dangerous† warning labels on their prior household products. One of the men had majored in chemical engineering and environmental science, and so they were able to produce the concoctions without any outside interference. Once they were produced, the men arranged for a local store to carry a few of theirShow MoreRelatedReflective Reflection Essay Examples963 Words   |  4 Pagesthinking skills to help me understand what needs they are looking to meet while attending future groups. Also, when completing these assessments, I have to look at factors that may contribute to a person overall function within the organization. For example, most of the young people that come into Youth-Outlook, often have issues that pertain to mental health such as depression, bipolar disorder, or anxiety. Also, some of our client’s have attempted suicide in the past or have expressed suicide ideationRead More Internship Reflection Essay example1355 Words   |  6 Pages It has been a while since I started at the internship and I am really glad I decided to work here. I think the experience in this area is a good preview of my career and future. I am learning some important skills and finding out some things about myself and the tough skin I will need in order to stay in the area of juvenile support. One of my responsibilities involved checking the messages from the days before on the office phone. I found that some of the potential mentors sounded older. ThisRead MoreAssessment Reflection Essay examples953 Words   |  4 Pagesstudent-performance, along with test of the material presented, and a humanistic approach on how my students are impacted by the grades they receive. For instance, my Asperger student, Lukas, needs his assessments to contain fact-recall questions, and essay questions need to have step-by-step answers. He does not perform well if questions regarding interpretations of emotions or non-factual data of information are part of the assessment. Students who are high-risk for failure because of anxiety needRead More Ethics Reflection Essay example2176 Words   |  9 Pagesbased on Kant’s philosophy. Using Kant’s second test to determine whether or not saving the mother would be morally right, the firefighter would have to determine if the reasons behind saving his or her mother were because of a means to an end. For example, if the reason the firefighter wanted to say his or her mother is for his own sake, or for some other â€Å"need,† such as food, clothing, shelter, etc. If the firefighter were to determine that the reasons his or her mother should be saved were, indeedRead MoreManual Handling: a Reflection Essay example1163 Words   |  5 Pagesprofession. One of the lessons they taught to us is about Manual Handling. When the topic was introduced to us, the first thing that came to my mind is that manual handling is all about how to lift or transfer a patient from one place to another (for examp le: bed to chair). But then, when my clinical instructor started the lecture, I’ve come to realized that manual handling does not only mean carrying, lifting, or transferring a patient from place to place. It also involves carrying, lifting or transferringRead More Reflections on Shevchenkos Kateryna Essay example1708 Words   |  7 Pagesdark-browed maidens, But not with the Moskali, For Moslals - theyre foreign folk, Bringing naught but grief. (Shevchenko) The poem reproduced one of the most typical problems of contemporary society the fate of oppressed girl. Probably, the frequent reflections on the role and place of women in human in Shevchenkos writing was caused by personal drama in the poets life. In early childhood, his mother Was laid by toil and want and cares (Shevchenko) Shevchenko passionately fond sisters, doomed to endRead MoreAdult Learning: Andragogy Reflections Essay example993 Words   |  4 PagesAndrogogy Reflection Adult learning began to be viewed as a separate field of learning in the 1970’s, when nontraditional students prompted by social context, demographics and technology began to seek continuing education or higher education in record numbers. Androgogy, a theory of learning proposed by Malcolm Knowles, â€Å"became a rallying point for those trying to define the field of adult education as separate from other areas of education† (Merriam, Caffarala, Baumgartner, 2007, p. 85). AttemptingRead MoreReflection on The Dakota Sun Dance Essay examples660 Words   |  3 Pagesthe Sun Dance ritual. The Shoshone believe that the buffalo taught someone the correct way to dance and what the benefits were of dancing. You can see how much of an impact the buffalo has by everything that the Sioux do during the Sun Dance. For example the buffalo is used as an alter during the Sun Dance. They have special offerings presented to the skull. The Sioux specifically believe that the bones of the buffalo they have killed will rise again and create new lives. I found it very neat thatRead MoreReflections of the Philosophy of the History of Mankind Essay examples652 Words   |  3 PagesReflections on the Philosophy of the History of Mankind â€Å"Reflections on the Philosophy of the History of Mankind† was written by Johann Gottfried Herder. He starts of by stating the simple fact that no two things are alike. Whether he is talking about leaves off the same tree, or humans, everything is slightly different in appearance. Although items may closely resemble each other, they have characteristics that make them different in one way or another. Herder goes on to argue no person is theRead MoreReflection on Taking Blood Pressure Essay example1848 Words   |  8 PagesA REFLECTIVE ACCOUNT OF A LEARNT SIMULATED SKILL BLOOD PRESSURE. The aim of this essay is to reflect and discuss my knowledge acquired in a simulated learning skill experience which forms part of my training as a student nurse in accordance with the Nurses and Midwifery Council (NMC 2010). (Marieb and Hoehn, 2010, p 703) defined Blood Pressure (BP) as ‘the force per unit area exerted on a vessel wall by the contained blood, and is expressed in millimetres of mercury (mm Hg)’. BP is still one

The Scarlet Letter Study Guide Free Essays

Transcendentalism was a religious and philosophical movement of the early nineteenth century that was dedicated to the belief that divinity manifests itself everywhere, particularly in the natural world. It also advocated a personalized, direct relationship with the divine in place of formalized, structured religion. This second transcendental idea is privileged in The Scarlet Letter. We will write a custom essay sample on The Scarlet Letter Study Guide or any similar topic only for you Order Now After marrying fellow transcendentalist Sophia Peabody in 1842, Hawthorne left Brook Farm and moved into the Old Manse, a home in Concord where Emerson had once lived. In 1846 he published Mosses from an Old Manse, a collection of essays and stories, many of which are about early America. Mosses from an Old Manse earned Hawthorne the attention of the literary establishment because America was trying to establish a cultural independence to complement its political independence, and Hawthorn’s collection of stories displayed both a stylistic freshness and an interest in American subject matter. Herman Melville, among others, hailed Hawthorne as the â€Å"American Shakespeare. † In 1845 Hawthorne again went to work as a customs surveyor, this time, like the orator of The Scarlet Letter, at a post in Salem. In 1850, after having lost the Job, he published The Scarlet Letter to enthusiastic, if not widespread, acclaim. His other major novels include The House of the Seven Gables (1851), The Blithered Romance (1852), and The Marble Faun (1860). In 1853 Hawthorn’s college friend Franklin Pierce, for whom he had written a campaign biography and who had since become president, appointed Hawthorne a United States consul. The writer spent the next six years in Europe. He died in 1864, a few years after returning to America. The majority of Hawthorn’s work takes America’s Puritan past as its subject, but The Scarlet Letter uses the material to greatest effect. The Puritans were a group of religious reformers who arrived in Massachusetts in the sass under the leadership of John Winthrop (whose death is recounted in the novel). The religious sect was known for its intolerance of dissenting ideas and lifestyles. In The Scarlet Letter, Hawthorne uses the repressive, authoritarian Puritan society as an analogue for humankind in general. The Puritan setting also enables him to portray the human OLL under extreme pressures. Hester, Timescale, and Chlorinating, while unquestionably part of the Puritan society in which they live, also reflect universal experiences. Hawthorne speaks specifically to American issues, but he circumvents the aesthetic and thematic limitations that might accompany such a focus. His universality and his dramatic flair have ensured his place in the literary canon. MORE HELP Read No Fear The Scarlet Letter Buy the print The Scarlet Letter Soapstone on BAN. Com Buy the eBook of this Soapstone on BAN. Com Download the PDF of this Soapstone on BAN. Com How to cite The Scarlet Letter Study Guide, Papers

Erie Canal free essay sample

The difficulty in the transportation of goods from Old Northwest to the East Coast lead to the construction of the Erie canal which seemed impossible but is completed successfully and impacted America in many ways. The search for efficient routes through the Appalachian Mountains gives birth to the idea of the Erie Canal. During the earlier 1800’s farmland was becoming scarce on the East Coast. As a result many farmers traveled west over the Appalachian Mountains where there was plenty of rich farmland in the Old Northwest for them to cultivate (Benson, Brannen, and Valentine 515-519). People who settled in the Old Northwest faced the problem of transporting the goods East through the Appalachian Mountains. The only water way for transportation was the Mohawk River which still did not get travelers and goods entirely to the East Coast. This caused many to ship goods by land which was costly and time consuming (Sheriff 251-253). Benson, Brannen and Valentine describe the East’s interest and concern in constructing a route saying, â€Å"Eastern port cities, such as Baltimore, Maryland; Philadelphia, Pennsylvania; and New York City, competed vigorously to be the first to forge transportation links with the Old Northwest† (515-519). The mountains were a huge obstacle though making it almost impossible to build any sort of transportation such as roads, trains, or canals. Except in New York there was a passage low enough for the possibility of a water passage (Benson, Brannen, and Valentine 515-519). The problems of transportation and construction of an efficient route sparks the idea of building the Erie Canal. The Erie Canal project faced many obstacles to be completed and seemed like an impossible task yet goes very smoothly and is a success. The first obstacle was finding support for funding. Many people doubted the Erie Canal project would succeed because the canal would be significantly bigger than anything attempted before (Benson, Brannen, and Valentine 515-519). Sheriff describes peoples doubt saying, â€Å"the prospect of a 363-mile canal seemed hopelessly impractical to even some enlightened minds† (251-253). The largest canal in the United States at the time was 27 miles long and the Erie Canal being 363 miles long would be about thirteen times that. Even with peoples’ uncertainty New York’s governor, Dewitt Clinton, was able to obtain support for the project (Benson, Brannen, and Valentine 515-519). Construction was approved and began in 1817 and the canal was dug from Albany to Buffalo. The canal was to be dug 4 feet deep and 40 feet wide (A Brief History 2). Another obstacle was the fact that there were no civil engineers in the United States at the time, so four amateurs were put in charge of the construction instead. This obstacle is overcome though by the innovation of these four amateur engineers. Instead of the slow method of digging with shovels and using wheelbarrows, they had plows and scrapers pulled by animals to dig the canal. They also invented clever tools that could quickly clear trees with one man and have the stumps pulled out with only seven people. The workers consisted mostly of local farmers, mechanics, and a few Irish immigrants. Work went along smoothly no problems arose from the workers or from the engineering aspect of the building the canal. The construction of the canal was completed in October 1825 (Benson, Brannen, and Valentine 515-519). Though many doubted in the project and there were no professional engineers in charge, the construction of the canal was a success that has a great impact on America. The Erie Canal had many positive impacts that helped America but a few that caused problems. One of the largest positive impacts was on the economy. Once the canal was made all of the raw goods from the West went to New York and they sent back finished goods allowing their economy to flourish (Sheriff 251-253). The Erie Canal also greatly reduced cost of shipping to the East (Commentary on Erie 1). It used to cost 100 dollars to ship one ton to New York but after the canal it only cost 8 dollars a ton and was much faster than shipping on land. This cheaper cost also caused cities along the Erie Canal to grow tremendously in population and the economy along the canal to grow (Benson, Brannen, and Valentine 515-519). Erie Canal also inspired canal building across America further advancing the transportation of goods throughout America (Commentary on Erie 1). A negative effect of the canal was it increased the spread of deadly diseases like small pox and cholera affecting those along the canal and in New York. Also some religious people did not like the sale of alcohol on Sunday on boats in the canal (Benson, Brannen, and Valentine 515-519). The Erie Canal had huge affects on America boosting the economy, inspiring the construction of canals, and the spread of disease. In the endeavors of creating a better way to transport goods from Old Northwest to the East Coast the Erie Canal was built despite the obstacles it faced and ended up changing America. The Erie was built to assist trade between Old Northwest and the East Coast. The project was controversial whether or not it would work. It did work and it had a huge affect on America’s Northern economy and initiated the building of many other canals. The Erie Canal was very important without it America may have had even more economic trouble over time. Works Cited A Brief History of the Erie Canal. The Erie Canal Museum. N. p. , n. d. Web. 25 Oct. 2012. lt;http://eriecanalmuseum. org/gt;. Benson, Sonia, Daniel E. Brannen, and Rebecca Valentine. Erie Canal. UXL Encyclopedia of U. S. History. Vol. 3. Detroit: Gale, 2009. 15-519. Gale U. S. History In Context. Web. 25 Oct. 2012. lt;http://ic. galegroup. com/gt;. Commentary on Erie Canal at Lockport, New York. The Civil War. Woodbridge, CT: Primary Source Media, 1999. American Journey. Gale U. S. History In Context. Web. 25 Oct. 2012. lt;http://ic. galegroup. com/gt;. Sheriff, Carol. Erie Canal. Dictionary of American History. Ed. Stanley I. Kutler. 3rd ed. Vol. 3. New York: Charles Scribners Sons, 2 003. 251-253. Gale U. S. History In Context. Web. 25 Oct. 2012. lt;http://ic. galegroup. com/gt;.