The questions of Chemistry for Life Sciences Assignment

The questions of Chemistry for Life Sciences - Assignment ExampleThis paper consists of 6 questions on 6 pages. Section A 1 (a) Balance the equation, given at a lower place, for the reaction in which H2Se is formed from Al2Se3 Al2Se3 + 6 H2O --------------- 2 Al (OH) 3 + 3 H2Se (1 mark) 1 (b) Describe how the covalent bonds argon formed in an H2Se molecule. Selenium has 6 valence electrons. Two of these electrons are involved in the formation of covalent bonds with two early(a) hydrogen atoms, the other valence electrons remain as lone pairs. An unpaired electron of each hydrogen atom pairs with a valence electron of Selenium, forming two covalent bonds. H Se H (2 marks) 1 (c) The hydrogen halides contain polar covalent bonds. 1 (c) (i) State what is meant by the term polar as it applies to a covalent bond. The covalent bonds in hydrogen halides are polar in nature, because halides are more(prenominal) electronegative than hydrogen. The shared electron pair is pulled towards t he electronegative halide, leading to unequal sharing of electron pair. This causes charge separation, making the hydrogen more electropositive and the halide more electronegative (dipole). (1 mark) 1(c) (ii) Explain why the HCl bond is more polar than the HI bond. The electronegativity of Chlorine is 3.16 on the Linus Pauling scale, while that of Iodine is 2.66. Since the electronegativity of chlorine is more than iodine, the pull on the shared electron pair in H-Cl is more than in H-I. ... Experiment Initial P / mol dm3 Initial Q / mol dm3 Initial treasure / mol dm3 s1 1 1.2 ? 103 2.0 ? 103 1.8 ? 105 2 6.75 2.0 ? 103 2.7 ? 105 3 0.60 ? 103 6.0 ? 103 21.6? 109 4 1.8 ? 103 5.49? 102 0.30 ? 105 (3 marks) 2 (a) (ii) Using the data from Experiment 1, calculate a value for the send ceaseless, k, and state its units. Calculation............................................................................................................... Rate constant, k, for experiment 1 is calculat ed as follows rate = kPQ2 1.8 ? 105 mol dm3 s1= k 1.2 ? 103 mol dm3 2.0 ? 103 mol dm32 Therefore, k= =0.375?104 mol-2 dm-6 s-1= 3.75?103 mol-2 dm-6 s-1 The rate constant, k, is calculated as 3.75?103 mol-2 dm-6 s-1 Units mol-2 dm-6 s-1 (3 marks) 2 (b) The decomposition of compound R is a zero order reaction. On the axes below sketch a line to show the relationship between the initial rate of reaction of R and the initial concentration of R at constant temperature. Initial rate Initial R (1 mark) 3. Define the following terms used in reaction kinetics. (a) Overall order of reaction The overall order of reaction is defined as the sum of the order of reaction of individual reactants, or sum of the powers of the concentrations of the individual reactants. If rate=kAx By, then Overall order of reaction= x+y (1mark) (b) Rate constant Rate constant is defined as the coefficient of the ratio between rate of reaction and the product of the concentration of the reactants. k= rate/Ax By (1mark ) (Total 2 marks) 4. The equilibrium reaction 3Fe(s) + 4H2O(g) - Fe3O4(s) + 4H2(g) was at one time used to make hydrogen the tri-iron tetroxide was returned to the blast furnace to be converted back to iron. Write

The Responsibility of the Auditor for Fraud and Error Lab Report

The Responsibility of the Auditor for Fraud and Error - Lab Report ExampleThis penning discusses the auditors responsibility for role player and error. It studies the link between the objectives of external audit to this responsibility. It draws on relevant auditing standards that provide guidance on the responsibility of the auditor for fraud and error in the financial statements. It also discusses the responsibilities of the business entities maturate of directors and management. Lastly, it provides some discussions on the higher profiled fraud cases in the past and the effect on the auditing profession of these high profiled cases.The Glossary to the International Standards on Auditing or ISA (p. 19, IFAC, 2010) officially defines fraud as an intentional act, committed by a trusted individual or certain individuals by using deception to obtain an unjust or illegal advantage that inevitably leads to the misstatement of the financial statements. Error, on the former(a) hand, is defined as an unintentional misstatement in financial statements which may include omitting a certain amount or a certain disclosure (p. 18, IFAC, 2010). both(prenominal) fraud and error may lead to financial statements misstatements. Both of them may lead to restatements misstated financial statements. However, what sets the two apart is whether the financial statements misstatement is deliberate or not, with fraud considered more serious (and illegal) than error.Financial statements fraud is done due to a variety of reasons. Some of the reasons may include trying to obtain new address or more investments creating favorable stock value trying to conceal an inability to improve the performance of the company increasing management or the board compensation by showing higher earnings obtaining a promotionwithin the company and hiding improper business transactions (p. 58, Rezaee and Riley, 2010).

Rumours by Fleetwood Mac Research Paper Example | Topics and Well Written Essays - 2500 words

Rumours by Fleetwood mackintosh - Research Paper ExampleFor purposes of this analysis, this essaywill seek to review and shed a level of understanding onto the bands 11th studio album entitled Rumours. As with many of their previous albums, Rumous experienced a wide degree of success and was certied fo thave sold over 40 gazillion copies worldwide. Such a massive commercial success indicates that the ablum and the band themselves had a profound effect on the formation of American culture during the turbulent mid-sixties and 1970s. As a function of this impact, the proceeding analysis will consider the cultural role that the album and tha band has had on the American dynamic.Seeking to valuate the impact of the album of course requires one to reqalize the impact of the times in which it was recorded as well as understanding the unique dynamics that existed mingled with the individual musicians at that time. Ultimately, what the band was most interested in, like most profitable mus ical acts, was to further the commercial success they had experienced within the bypast decade. As a function of moderate to wildly successful album sales for the past 10 albums that had been released, the trio of vocalists to engage in the commissioning and deed of an 11th album. What is unique about the process that led to the creation of the 11th album is the fact that the band was ultimately struggling with a form of ego destruction/headonism, interpersonal conflict, and the pressures that year after year of being on tour as well as the emotional strain of living a life of wreckless abandon necessarily entails. Moreover, the band members engaged in the highly successful vision of deviating, at least slightly, from their previous albums while at the akin time not alienating their fan base in the process by presenting them with sounds that were too different from what they had come to love and from what had ultimately made Fleetwood Mac a staple of 70s rocknroll. Culturally, t he album itself cannot and should not underestimated. Firstly, in order to understand the cultural influences that gave rise to the album itself, the reader should consider what was taking place in and around the world as well as in the United States in 1976. At this point, the

Retailing story Essay Example | Topics and Well Written Essays - 1000 words

Retailing story - Essay ExampleOften, he could split the food and the compeer became so discontent with his living conditions (Keding 33). This made the couple to buy a wooden bowl, which they used to serve the old man food. One day when the couple was just sitting, their little son began to gather about wood in the ground. When his mystify asked what he was doing, the son responded that he was creating a wooden bowl for his parents to use in the future. Immediately, the couple began to cry and were ashamed that they were copeing their father so cruelly, and from that day they decided to treat their father right. The plot details The main characters of the story are the old man, his son and wife, and grandson. At the beginning of the story, the reference uses these characters to communicate his intended message to his audience. Basically, the elderly character portrays the qualities of the disability and lack of power to perform his daily duties and responsibilities. The son an d his wife are arrogant and offense their father. However, their grandson honour the experience of the older generation and this explains why he is making a wooden bucket for their parents to use when he grows up. The mentioned characters create a cockeyed ground for readers to understand the things that elderly people go through. They are often discriminated and disrespected by the younger generation. This story is important to our culture in that, it teaches parents on how to fill up their children in an upright way. This is because children are likely to imitate their parents conducts. This story is significant since it helps parents to understand that if they disrespect their elderly parents, their children are more likely to treat them meanly when they become old. The story continues to be told because it addresses a major concern in the society. The story is a wake up call for parents to correct their actions so that children begin to emulate true role models. This story is often narrated to create insights on why parents should cherish being role models to their children. This story means a lot to me in that it helps me articulate the importance of respecting the elderly. It reminds me of how the elderly are subject to discrimination from the younger generation. Further, this story shows the benefits of respecting the elderly as, preserving respect for personal and future generations. diverse theories have been advanced by different theorists such as Maria Montessori, Jean Piaget, and Lev Vygotsky (Calvert and Barbara, 22). Although their theories differ greatly, these theorists have a similar concept of learning and children development. They retrieve that learning and development occur when children interact with the people around them and the environment (Pinter 28). The theorists affirm that young children are active learners and they tend to imitate those around them. prick TWO Retelling the story Once upon time, they lived a very old man in a small who lived in disability, His eyes had become dim, his knees trembled, and his ears were dull of hearing. His bread and butter was difficult in that he could hardly hold a spoon when eating and often he could split the food on the table. His son and his wife were disgusted at his fathers conduct and they served him food in the earthenware bowl. The poor man underwent a lot because of his age and his inability to perform project duties. One day, his trembling hands could not hold

Reading a Health Record Coursework Example | Topics and Well Written Essays - 500 words

Reading a Health Record - Coursework ExampleAbdomen Benign, Genitalia normal with red sacral atomic number 18a. Extremities 3+ pitting oedema to the knees. Neurological good and on track. The patient doesnt sleep well, has increased pedal edema and no symptoms of coughing or fever. X-ray displays Left pleural effusion, congestive heart failure and pneumonia.In the case of patient assessment with cognitive heart failure, left pleural effusion and pneumonia a dosage of Diurese was administered, quadruplet antibiotics, blood cultures and sputum test. The patient is admitted and put on bed rest with oxygen mask.Behavioral problem patient constantly complaining of poor nutrition conditions of the facility, staff and food. She doesnt want to sleep in her room. Causal factor appears to having trouble with anger or adjustment problem and severe end-stage cardiomyopathy.Cardiomyopathy is caused by hardening of the arteries responsible for bringing blood into the heart. As the arteries na rrow the heart lacks oxygen and gradu altogethery it becomes difficult for the heart to pump blood.This condition is diagnosed when heart has second base heartbeat and fractional ejection is lower. Fractional ejection can be tested through MRI of heart, echocardiogram, cardiac blood pooling image and gated SPECT.Change of sealed lifestyle habits that lead to heart failure. Introduction of a Pacemaker to help the heart beat slow down or beat normally. There are surgery procedures like angioplasty and cardiac catheterization that helps good flow of blood in the veins. If a patient fails all treatment then heart transplant would be the only alternative left. (Libby & Braunwald, 2008)The patient was put under the right diagnosis given her symptoms and the treatment of the disease. The patient tested positive for Ischemic cardiomyopathy. The patient displayed all symptoms as projected in the hospital records that matched the

GENETICS ASSISGNMENT (GENOGRAM) Essay Example | Topics and Well Written Essays - 500 words

GENETICS ASSISGNMENT (GENOGRAM) - Essay ExampleBelow is a three-generation genogram showing age, death, marriage, illness, abuses, and divorce status of the family.Genes, made of DNA bases, are the blueprint of inheritance (Skirton et al., 2005). from each unrivaled individual has thousands of genes, with each individual inheriting a replica of the gene from their parents. The organization of genes is along string-like edifices called chromosomes and each individual receives 2-sets of 23 chromosomes one from their father and one from their mother (Tranin & Jenkins, 2003). Apparently, backside has inherited the alcoholic habit from his father and Lois has inherited asthma from her father who had it as a recessive trait that developed from Lois paternal grandmother. A comprehensive DNA screening can be done to ascertain the exact level of alcoholism in bum and maneuver on techniques of circumventing further alcoholism in the family (Jenkins & Lea, 2005).Additionally, John, Lois, a nd Rick can be subjected to patient education program where John will be taught on how to avoid alcohol, Lois on how to handle her asthmatic condition, and Rick on how to avoid becoming alcoholic or ascertain whether he is likely to be alcoholic in the future. John and Lois should learn on how to manage their situations rather than blaming their families for their medical conditions. However, it is ostensible that if the second generation (father in particular) had been subjected into programs that would enable them to effectively handle his conditions, the risks of asthma and alcoholism would commence significantly been reduced in the third generation.Additionally, genetic testing for innate genetic variants should be performed to determine genetic risks for the third generations (Rick, Lois and John) progeny, diagnose the symptoms in John and Lois, and shed light on the appropriate treatment for John and Loiss condition. Gene products, DNA, or chromosomes

See description Essay Example | Topics and Well Written Essays - 1000 words

See description - Essay ExampleWhile offshore drilling is non the complete answer to our energy problems there are a few advantages and benefits that we will reap if this is pursued. On the other hand, careful examination of the possible consequences should be done to determine if the disadvantages outweigh the advantages. .One of the largest benefits of offshore drilling for anele color and gas is the financial gains it would baffle to the country. This type of production would result in the excogitation of hundreds of jobs which are well needed to lower the unemployment rate which has grown significantly since the economic recession. According to the American Energy Alliance (2009) offshore drilling would bring three phrases of development that would contribute significantly to the nations economy. The organization stated that industries would grow from the initial exploration and development of offshore facilities the extraction of rock oil and gas resources and refining cru de oil into finished petroleum products.The report from the organization also predicted $2.2 trillion in total tax receipts 1.2 trillion jobs annually across the country and $70 billion in additional wages each year. The United States currently imports two billion barrels of oil annually. The Energy department has announced that this year it is expected to import 2.7 trillion cubic feet of natural gas. A sustained flow of oil from a domestic help source of energy would create sustained financial flow to the national treasury thus allowing the government to focus on many areas left neglected due to lack of proper funding.Another advantage of offshore drilling comes in the way of increased political power and authority. The dependence of the United States on oil and gas imports has lessened the power it has in influencing the price of oil. This power lies in the hands of the Organization of Petroleum Exporting Countries (OPEC) that have the power of manipulating oil production which can negatively