Chemistry questions Essay Example | Topics and Well Written Essays - 1500 words

Chemistry questions - Essay Example -0.0005 33.4 -1.49701E-05 -0.00428 127.7 0.003 0.000012 2.12833333 -0.0005 38.5 -1.2987E-05 -0.00433 173.3 0.0025 0.00001 2.88833333 -0.0005 45.6 -1.09649E-05 -0.00439 229.1 0.002 0.000008 3.81833333 -0.0005 55.8 -8.96057E-06 -0.00448 301 0.0015 0.000006 5.01666667 -0.0005 71.9 -6.9541E-06 -0.00464 402.4 0.001 0.0000039 6.70666667 -0.0005 101.4 -4.93097E-06 -0.00493 575.6 0.0005 0.000002 9.59333333 -0.0005 173.2 -2.88684E-06 -0.00577 pseudo-order rate constant = average of the rate constant (-0.00459) Section 3 12. Which of the transformations shown is a substitution reaction A substitution reaction is one in which a functional group is replaced by another in a chemical reaction, functional group are a group of atoms within a molecule that are responsible for chemical reactions, therefore the substitution reaction is A. 13. Which of the transformations shown is an addition reaction An additional reaction is one in which one or more molecules combine to form a new and larger molecule and this in turn reduces the degree of unsaturation, they are the reverse of an elimination reaction, our answer is C. 14. Statement 1 Reaction 17A will proceed faster than reaction 17B. (Assume the same concentrations of substrate and reagents.) BECAUSE Statement 2 Reaction 17A will proceed mainly via an SN2 mechanism whereas Reaction 17B will proceed mainly via an SN1 mechanism. D Both statements are true but Statement 2 is not a correct explanation of Statement 1. 15. Statement 1 Reaction 18 will give product 18A rather than product 18B. BECAUSE Statement 2 Elimination by the E2 mechanism proceeds via an antiperiplanar conformation. You are asked first to decide whether each statement of the pair is true or false, and then, if both statements are true, to decide...The change of concentration of phenolphthalein (phth) with time is given in the table shown. A substitution reaction is one in which a functional group is replaced by another in a chemical reaction, functional group are a group of atoms within a molecule that are responsible for chemical reactions, therefore the substitution reaction is An additional reaction is one in which one or more molecules combine to form a new and larger molecule and this in turn reduces the degree of unsaturation, they are the reverse of an elimination reaction, our answer is 19. The following questions concern the molecules SF4 (central atom S) and BrF3 (central atom Br). In order to answer these questions, you will find it useful to use VSEPR theory to determine the shapes of SF4 and BrF3, and also to find the symmetry elements in both species and determine the point groups. 23. Four reagents in the Key for Q32 are employed in a sequence of reactions (steps 1, 2, 3 and 4) to convert m-bromonitrobenzene into m-bromobenzoic acid (32). Reagents B and D are used for steps 1 and 2 respectively. In the spaces in the Key, type the appropriate labels of the two reagents most suitable for steps 3 and 4. 25.Select the most likely structure for the compound that gives rise to the 13C NMR spectrum with peaks at the following positions (given as /ppm) with the off-resonance

Symbolism In The Call Of The W Essay -- essays research papers

In Jack London's book, The Call of the Wild, he symbolizes many things in the book. Buck, gold sacks, Mercedes, and others are looked on as symbolic. In this essay, you will find out what these items symbolize.   Ã‚  Ã‚  Ã‚  Ã‚  The main character in the book is Buck, a half St. Bernard, half Scotch shepherd dog. In the story, he is betrayed by someone he trusts and is thrown into a harsh world. A world where you must work or be discarded. He adapts to the harsh environment, and soon enough becomes the leader of a wolf pack. Here London makes Buck a symbol of one that reaches full potential. Instead of lying around and doing nothing, he learns to work in a way he doesn't know too well about. He learns to fight and/or steal his food, if he didn't , he would have starved to death. That is why Buck is portrayed as one who achieves full potential.   Ã‚  Ã‚  Ã‚  Ã‚  Mercedes portrays the absolute opposite to Buck. She represents all that is weak in a civilized society. She cannot live without her precious belongings like her clothes. A suitcase of clothes would have been suitable for the trip, but she cannot part with her clothes, so she brings almost all of them. She doesn't know how to walk. When Charles and Hal ask her to get off the sled and hike along, she refuses and has to be carried off and dropped. When Charles and Hal set up camp, they have to go back and pick up Mercedes, who thinks she should be carried to Dawson City. Charles and Hal shouldn'...

Edgar Linton has more right Essay

The word hero conjures an image in one’s head of a valiant, courageous, strong individual; one who puts the needs of others before their own, a being who defies evil with their handsome charm and fearless nature. However, this stereotypical image does not accurately depict the full extent to which the term hero covers, as there are many different types of hero including the Byronic Hero, Classic Hero, Medieval Hero, and Romantic Hero. Classic Heroes are those in Greek and Roman literature; they are often of royal birth or even like the Titan Prometheus; half mortal, half god. Although Edgar Linton is not of royal descent, he is from a family of the highest social class throughout the country which allows him to fall loosely into this category of noble birth. Heathcliff on the other hand, is from a discernible background and is brought into the household at Wuthering Heights as a ‘gipsy brat’ after Mr. Earnshaw saw, ‘it starving, and houseless, and as good as dumb in the streets of Liverpool.’ Another characteristic of a Classic Hero is that they perform extraordinary feats. Throughout the novel Edgar Linton displays no obvious signs of having done anything extraordinary; he is a calm, weak natured individual who avoids conflict and allows himself to be easily overpowered both by Heathcliff and his wife allowing the latter to mock him, ‘I wish Heathcliff may flog you sick, for daring to think an evil thought of me!’ In contrast to this, Heathcliff performs many extraordinary deeds however, few of which are in any way admirable and for the benefit of anyone but himself for example, after being degraded for years at the abusive hands of Hindley, Heathcliff disappeared for three years and that space of time turned himself into an outwardly respectable and wealthy man. In addition to the former points, a classical hero must be a perfectly ideal individual but for one fatal flaw. One’s opinion of Edgar Linton can be altered to allow him to fit into this category as he is a well-mannered character who is obviously fully devoted to both his wife and his daughter; Nelly Dean observes, ‘I don’t believe he ever did speak a harsh word to her.’ However, his gentle, spoiled upbringing may be his flaw as it has made him subservient character that lacks the confidence and passion Heathcliff possesses and thus lacks the ability to keep hold of Catherine and make her happy. Heathcliff again, does not fit the mould of the Classic Hero as he fails to meet this criterion; he is an abusive, evil, sadistic individual who shows no hint of remorse or of possessing any admirable qualities. Although neither Edgar nor Heathcliff perfectly fit the mould of a Classic hero, Edgar has more right to be called a Classic Hero than Heathcliff does. However, Heathcliff does fully reserve the right to be classed as the Byronic Hero within the novel as he possesses all the characteristics of one of these heroes while Edgar has none of them. These heroes are manipulative, violent and unrepentant. Heathcliff shows his manipulative nature when he allows Isabella Linton to fall in love with him, he tells Nelly, ‘she abandoned them under a delusion’, showing he was fully aware of her feelings and used them to his advantage, employing them as a tool in which he could gain control and ownership over both properties; Wuthering Heights and Thrushcross Grange. His displays of violence are prominent throughout the novel, beginning as a young boy and developing into adulthood. As a young child he, ‘seized a tureen of apple sauce’ and threw it over Edgar Linton’s face. As an adult his violence worsens as, ‘he snatched a knife from the table and flung it at’ his wife, Isabella’s head. In addition to this, he comes close to murdering Hindley and even with Catherine, his true love he does not possess the capability to be gentle, ‘so inadequate was his stock of gentleness†¦ I saw four distinct impressions left blue in her colourless skin.’ Heathcliff’s unrepentant nature is evident via the lack of regard he holds toward his victims which stems from his arrogant personality. The height of his arrogance is seen when he tells Catherine in front of Edgar, ‘This lamb of yours threatens like a bull!†¦ It is in danger of splitting its skull against my knuckles. By God, Mr. Linton, I’m’ mortally sorry that you are not worth knocking down.’ Arrogance is also a common trait of Byronic Heroes. Despite the fact that both men can be called heroes in their own right to a certain extent, it is because of his amiability and good nature Edgar Linton has the right to claim the title of the respectable hero within the novel. However, in saying this looking at all the characters within the novel, it may be argued that neither man deserve the title but a woman does as the women in the novel are strong, independent and highly feministic characters.

Behavior and Development of Children with Autism Spectrum...

This paper will review five studies concerning the behavior and development of children with Autism Spectrum Disorders. The studies investigate how autism effects communication, socialization, cognitive development, and a number of other areas. Researchers use many different types of scales to measure and compare the difference between children with ASD and typically developing children. Methodology Study 1 Morgan, Lindee, Wetherby, Amy M., Barber, Angie (2008) Repetitive and stereotyped movements in children with autism spectrum disorders late in the second year of life In this study there were three groups of children between 18 and 24 months of age participated. One group had Autism Spectrum Disorder (ASD), another group had†¦show more content†¦The families who met these criteria were then mailed packets of questionnaires and were scheduled for two visits. The first visit lasted 2-3 hours and assessed the child in a laboratory setting using the Mullen Scales of Early Learning, Imitation Battery (IB), and the Early Social Communication Scales. The second visit was about 2-4 hours in a home setting and was mainly and interview of parents, primarily mothers. The interviews and scales that this was based on measures social and communicative functioning, developmental functioning from birth to 5 years 8 months, scores gross and fine motor skills, visual reception, and receptive and expressive language. The interview with the parents assessed the children’s personal and social efficiency in communication, daily living skills, socialization, and motor skills. The packets measured between the ages of 8 and 16 months and were about vocabulary comprehension, production, and use of gestures. Study 3 Solomon, Marjorie, Ozonoff, Sally, Carter, Cameron, Caplan, Rochelle (2008) Formal Thought Disorder and the Autism Spectrum: Relationship with Symptoms, Executive Control, and Anxiety The sample of this study consisted of two groups of children aged 8-18 who are diagnosed with autism spectrum disorder. They were recruited from the M.I.N.D. Institute (Music Intelligence Neural Development Institute).Show MoreRelatedAnalysis of â€Å"Behavior Predictors of Language Development over Two Years in Children with Autism Spectrum Disorders†1505 Words   |  7 PagesThe scientific study, â€Å"Behavior Predictors of Language Development over Two Years in Children with Autism Spectrum Disorders,† conducted by Karen D. Bopp, Pat Mirenda, and Bruno Zumbo was published in the Journal of Speech, Language, and Hearing Research. This study was conducted in British Columbia, Canada from data retrieved from a database of another study. The goal of this study was to determine if certain types of behaviors often displayed by autistic children before intervention could be predictorsRead MoreAutism Spectrum Disorder and its Causes Essay906 Words   |  4 Pagesand fifty children was diagnosed with autism spectrum disorder. Since then, there has been a drastic increase on the incidents of this disorder. In 2013, according to the Centers for Disease Control, Autism spectrum disorder occurs in one out of eighty eight children. (CDC, 2013) That is a significant increase over a relatively short period of time. With such an increase, it is important to learn what autism spectrum disorder is and what might cause it. Autism spectrum disorder is the termRead MoreEarly Intervention is Crucial in Treating Autism Spectrum Disorder988 Words   |  4 Pageshas autism spectrum disorder† are words no parent wants to hear. They are words that will instill fear, worry, and sadness. When parents hear this for the first time, they will have many questions. â€Å"Is there anything I can do to help my child? If so, what can be done?† Early intervention services; such as applied behavior analysis therapy, occupational therapy, sensory integration therapy, and speech therapy before the age of three; can help improve the development of children with autism spectrumRead MoreAutism Spectrum1147 Words   |  5 Pagespertaining to autism is very broad and includes more than just autism itself. A child with an autistic disorder is hard to identify because autism is not easily seen. Autism is more of a mental and social disorder; it doesn’t really have anything to do with a physical outlook. The autism disorder doesn’t only deal with autism; there are five other primary disorders involved with autism. When screening a child for autism, they will find out if any other disorders should be diagnosed. Screening children forRead MoreAutism Spectrum Disorder and its Characteristics Essay1285 Words   |  6 Pagesand fifty children was diagnosed with autism spectrum disorder. Since then, there has been a drastic increase of the incidence of this disorder. In 2013, according to the Centers for Disease Control, autism spectrum disorder occurs in one out of eighty eight children. (CDC, 2013) That is a significant increase over a relatively short period of time. With such an increase, it is important to learn what autism spectrum disorder is and what might cause it. Autism spectrum disorder is the termRead MoreAutism Spectrum Disorder ( Autism ) Essay1396 Words   |  6 PagesThe disorders listed under the umbrella of Autism Spectrum Disorder, were once listed as autism and subtypes of autism. This was changed in 2013 when The Diagnostic and Statistical Manual of Mental Disorders, Fifth Edition (DSM-5) was published, and they were listed under the umbrella of Autism Spectrum Disorder. There are five disorders listed under the umbrella of Autism Spectrum Disorder: Autistic Disorder, Asperger’s Syndrome, Childhood Disintegrative Disorder, Rett Syndrome and Pervasive DevelopmentalRead MoreAutism Spectrum Disorder ( Asd )1587 Words   |  7 Pages Topic: Autism Spectrum Disorder  (ASD) Purpose: My audience will learn the importance of recognizing early signs of Autism Spectrum Disorder in children. Thesis: It is important to understand the early signs of Autism Spectrum Disorder, and why early intervention is the best treatment. Introduction: Gain/maintain attention There is a television show I like to watch called â€Å"The Big Bang Theory, maybe some of you have seen it. This show focuses on the relationships between a group of friends, someRead MoreThe Characteristics Of Autism Spectrum Disorders ( Asd )949 Words   |  4 Pages 1. What are the characteristics of Autism Spectrum Disorders (ASD)? As described in the textbook, there is a broad range of characteristics associated with Autism Spectrum Disorders (ASD). One of the first characteristics noted with ASD is language deficits, or using language in â€Å"odd† ways. As stated in the textbook, â€Å"Children with classic autism may be nonverbal. Alternatively, they may have significant language difficulties, so that their language may consist primarily of echolalia or delayedRead MoreAutism Spectrum Disorder And Autism Essay1393 Words   |  6 PagesAutism is a neurological disorder with many forms and severities, better known as autism spectrum disorder, that begins early in childhood and lasts throughout the individual’s life. Autism spectrum disorder is defined as developmental disabilities that can cause significant social, communication, and behavioral challenges (CDC). Previously, autism was recognized in distinct groups and types. Now, autism is referred to as a spectrum because there is an overl ap among all the different forms of autismRead MoreAutism Spectrum Disorder And Autism1389 Words   |  6 Pages Autism Spectrum Disorder Autism is a form of â€Å"ASD,† Autism Spectrum disorder and is experienced all around the world. Autism is a developmental disorder that consists of many neurodevelopmental disorders of the brain. People with autistic disorder think and act in different ways than most people. There are many different forms of autism spectrum disorder that include the pervasive development disorder, Asperger syndrome, and autistic disorder. These disorders are called spectrum disorders because