Law of Multiple Proportions Problem

Law of Multiple Proportions Problem This is a worked example of a chemistry problem using the law of multiple proportions. Two different compounds are formed by the elements carbon and oxygen. The first compound contains 42.9% by mass carbon and 57.1% by mass oxygen. The second compound contains 27.3% by mass carbon and 72.7% by mass oxygen. Show that the data are consistent with the law of multiple proportions. Solution The law of multiple proportions is the third postulate of Daltons atomic theory. It states that the masses of one element which combine with a fixed mass of the second element are in a ratio of whole numbers. Therefore, the masses of oxygen in the two compounds that combine with a fixed mass of carbon should be in a whole number ratio. In 100 grams of the first compound (100 is chosen to make calculations easier), there are 57.1 grams oxygen and 42.9 grams carbon. The mass of oxygen (O) per gram of carbon (C) is: 57.1 g O / 42.9 g C 1.33 g O per g C In the 100 grams of the second compound, there are 72.7 grams oxygen (O) and 27.3 grams carbon (C). The mass of oxygen per gram of carbon is: 72.7 g O / 27.3 g C 2.66 g O per g C Dividing the mass O per g C of the second (larger value) compound: 2.66 / 1.33 2 Which means that the masses of oxygen that combine with carbon are in a 2:1 ratio. The whole-number ratio is consistent with the law of multiple proportions. Solving Law of Multiple Proportions Problems While the ratio in this example problem worked out to be exactly 2:1, its more likely chemistry problems and real data will give you ratios that are close, but not whole numbers. If your ratio came out like 2.1:0.9, then youd know to round to the nearest whole number and work from there. If you got a ratio more like 2.5:0.5, then you could be pretty certain you had the ratio wrong (or your experimental data was spectacularly bad, which happens too). While 2:1 or 3:2 ratios are most common, you could get 7:5, for example, or other unusual combinations. The law works the same way when you work with compounds containing more than two elements. To make the calculation simple, choose a 100-gram sample (so youre dealing with percentages), and then divide the largest mass by the smallest mass. This isnt critically important- you can work with any of the numbers- but it helps to establish a pattern for solving this type of problem. The ratio wont always be obvious. It takes practice to recognize ratios. In the real world, the law of multiple proportions doesnt always hold. The bonds formed between atoms are more complex than what you learn about in a 101 chemistry class. Sometimes whole number ratios dont apply. In a classroom setting, you need to get whole numbers, but remember there may come a time when youll get a pesky 0.5 in there (and it will be correct).

Do managers take decisions for the good of the organisation or do they Essay

Do managers take decisions for the good of the organisation or do they behave the way they do for other reasons - Essay Example In the process of evolution, it is highly likely that the business developed from a one man enterprise or family business to a partnership, then to a public limited or private limited company. Ultimately it branched out from a local to regional and regional to international undertaking. It is highly probable, even inevitable, that the evolution and change in outside form also bring about changes in the internal handling of business decisions and operational practices. This becomes necessary as the tasks of managing the different aspects of the business become too complex and heavy for one man or a number of partners to manage alone. Ultimately as the business expands, it has to reinvent itself as a model of modern business enterprise. This will invariably involve the assignment or scheduling of tasks to professionally hired managers, with expertise in production techniques, Human Resources, marketing and sales, finance and accounting etc. Each departmental head becomes a prized resou rce, responsible for meeting his departments and workers goals and assignments. Authority and responsibility become interlinked, but seldom has it been seen that the upper management is taken to task for targets not achieved or a failed project. Rather, more often than not it is the middle and lower management and supervisors/ workers that are made to bear the brunt of the axe and the shame associated with it. This state of affairs often makes one stop and think- do managers take decisions for the good of the organization or do they behave the way they do for other reasons? This paper will argue that the interests of the organization are not always uppermost in the minds of the managers, rather, as they gain and wield power- managers tend to collude with each other for their own collective benefit, while in many cases insisting that failure was because of the ineptitude of people on the lower rungs of the ladder. I would rather state that managers keep their own interests uppermost in their mind at every turn. They are interested in their own survival, going as close to the top as they can, and toppling others who they consider as competition. The lower management or their subordinates are just pawns in the game (Rosen, 1988). The Evolution of the Modern Business Enterprise If we look at the evolution of a modern business, we see that it is quite likely to have its beginnings as a sole proprietorship or family business, in which every family member has a share of responsibilities. Or it could have started as a partnership, where two or more partners pooled together their skills, resources and business acumen to offer products and services to the general populace or those that needed their wares. The disadvantage here was that of unlimited liability, or cases where even their personal property could be attached to repay debts if the business failed. In time this led to the evolution of the corporate form of business ownership. As the Industrial Revolution swept through Europe and the Americas, investment was needed from both public and private sources to raise capital for infrastructure and the laying of railroads, transport and communication, factories and warehouses. The beginning of assembly line production at the Ford Motor Company meant that things could now be mass produced after breaking down the process into a series of steps. Then F.W.

Why the Culture of Supernatural is So Popular in Our Society Essay

Why the Culture of Supernatural is So Popular in Our Society - Essay Example Perhaps, it would have been a long journey down the lane of history to bear witness to the rigorous process of relaying accounts from way back the 16th century truth of ‘Bloody Mary’ and see how the modern-day belief significantly deviates from the valid main source. Thus, it is in such fashion of modified storytelling that we cease not as a society to have confidence in thought that supernatural beings cohabitate the Earth. Aside from plain communication, men have established popular media such as the TV, radio, films, and other technologically enhanced means of presenting stories that variably depict a monstrous character. Bram Stoker’s â€Å"Dracula†, M. Shelley’s â€Å"Frankenstein†, as well as S. Meyer’s â€Å"Twilight† saga that promotes a romantic vampire in Edward Cullen all converge to form the typical concept that vampires are fanged bloodsuckers who are normally on the dark side yet are capable of maintaining their you th for eternity. Because of what technology can do through audio-visual effects, the image and role portrayed by a vampire as perceived via the villainous Dracula or heroic Edward Cullen all the more gratifies the public curiosity about the authenticity, if any, of their individual myths. Hogan and Del Toro state â€Å"Science becomes the modern man’s superstition -- It allows him to experience fear and awe again, and to believe in the things he cannot see† (Del Toro & Hogan, NY Times). From the daily encounter of reality and the use of senses, one may find it hard to deny the fact that science and technology work hand-in-hand to make things possible to the extent of stimulating a human psyche toward the realization that there exists a more powerful entity than mankind. Moreover, the findings in â€Å"Why Vampires Never Die†... Aside from plain communication, men have established popular media such as the TV, radio, films, and other technologically enhanced means of presenting stories that variably depict a monstrous character. Bram Stoker’s â€Å"Dracula†, M. Shelley’s â€Å"Frankenstein†, as well as S. Meyer’s â€Å"Twilight† saga that promotes a romantic vampire in Edward Cullen all converge to form the typical concept that vampires are fanged bloodsuckers who are normally on the dark side yet are capable of maintaining their youth for eternity. Because of what technology can do through audio-visual effects, the image and role portrayed by a vampire as perceived via the villainous Dracula or heroic Edward Cullen all the more gratifies the public curiosity about the authenticity, if any, of their individual myths. Hogan and Del Toro state â€Å"Science becomes the modern man’s superstition -- It allows him to experience fear and awe again, and to believe i n the things he cannot see† (Del Toro & Hogan, NY Times). From the daily encounter of reality and the use of senses, one may find it hard to deny the fact that science and technology work hand-in-hand to make things possible to the extent of stimulating a human psyche toward the realization that there exists a more powerful entity than mankind. Moreover, the findings in â€Å"Why Vampires Never Die† suspect that humanity keeps to its core of nature an inevitable attachment to superstitious view of primitive ancestors who are pondered to have beastly and mystical traits.

Recommended procedures for improvement Essay Example for Free

Recommended procedures for improvement Essay As systems turn out to be more programmed and mechanized, those in charge of information system have a tendency to consider that more power will construct their processes better organized. In pulling manufacturing and design en route for computerization, the inclination is to provide as much power as probable to the mechanism and leave the lingering job tasks at hand. This automation viewpoint reduces the information and perceptive capacities of workers and pushes them to dislike the technology. Premises in the field of information system management are significant whether one’s orientation is in the direction of research or practice (Tapscott, 3). The responsibility of an organization is to help out in withdrawing the complication of the world and explaining and predicting proceedings. Given the information that the purpose of information system management management is to lessen the convolution of the empirical world by means of technology can benefit from sound improvement. While the complexity of the information system plan will vary based on the size of the district, it has to include a mission statement and rational, quantifiable goals and objectives that can be attained, in most cases, with obtainable resources. The Alachua’s budget also has to reflect the financial obligation to major technology initiatives included in the plan. Additionally, the planning process must include proceedings that allow decision makers to gauge the benefits of investments in information system and abandon or alter failed strategies for more triumphant ones. Methods of making a Web site secure from hackers It is not that software has turned out to be less protected, and it’s not almost certainly because of potential attackers having increased in number. The reason that hackers are more common is likely because many people do not know how to protect their Web sites. To make a website free from hackers, simply: (1) know your enemy, (2) create ‘strong’ passwords, (3) use good software, (4) update recurrently, (5) use a hardware server-side firewall and (6) facilitate WPA or WEP encryption on wireless network connections. Digital Signature Digital signatures are just like written signatures these are used to provide verification of the related input, typically called a ‘message’ (may be anything) a message sent in a more complicated cryptographic protocol or from an electronic mail to a contract. In cryptography, a digital signature or is a kind of asymmetric cryptography used to reproduce the security properties of a signature in digital than in a written form. Digital signatures usually give two algorithms one for signing that involves a user’s secret (private key), and one for validating signatures that involves user’s public key and the output of the signature method is known as the digital signature. â€Å"Terms and Conditions† or â€Å"Conditions of Use† -Websites and its related services are administered by the Terms and Conditions of Use, and the constant access to websites and its services is put through the user’s agreement to be bound by the Terms and Conditions of Use, as they may alter occasionally. Terms and Conditions of Use is a provision placed on a website notifying users regarding how the website deals with a user’s rights and responsibilities. Some websites characterize their Terms and Conditions of Use allowing users to routinely assess its services offered. If a user does not agree to Terms and Conditions of Use, a user may not use the website or its services. Plans of Alachua County in information system must state who is responsible for implementing and updating the technology plan. The Alachua County District’s technology plan must includes information on individual needs, equitable resource allocation, cost-effective acquisitions, technology funding, infrastructure and networking issues, technology-related professional development, support needs, and information management and delivery. On the other hand, the district’s does not make use of this best practice for the reason that the plan is not complete, is not based on a valid needs assessment, and is not evaluated and updated in a scheduled manner. The constituency should guarantee that the goals listed in the plan are detailed, quantifiable, manageable, rational, and time-bounded. The county also should ensure that the plan is monitored and updated based on valid data related to the district’s technology needs, skills, usage, and fluency levels among district employees. Strategies in the county’s strategic plan relate to technology and are considered the goals for the technology plan. In the district technology plan, the objectives are ambiguous (e. g. : guarantee, renovate, generate, etc.). Few of the objectives are assessable and are not based on detailed standards, making it complicated to document whether the objective was acquired. Additionally, it is imperative to note down that all decision-making in information system management is derived from some embedded premise. For the reason that the consequences by means of vague assumption information system management are better for all assumptions that give understanding may perhaps have even greater importance to all organizations (Tenkasi, 27). If one relies barely on the capability to forecast events devoid of understanding them, there is a greater prospective for making underprivileged, or at least unproductive decisions. The recommendations given are good examples of research that has hardened models of managing information systems in local areas and even in worldwide perspective. Yet there is still a need for more investigations to be able to accomplish a more constructive course of action in business information technology management. Information technology systems and management necessitate of a solid abstract establishment to direct both practice and research. Even though many of the recommendations being proposed by scholars and scientists in this field may possibly be compelling prescriptions for those who are on the lookout for something further than unsystematic information management, unless information management turns out to be strongly stranded in theories of organization. Works Cited: Tapscott, D. (1998) Growing Up Digital:The Rise of the Net Generation. McGraw Hill. Tenkasi, RV (1995) Technology transfer as collaborative learning. NY: Free Press Wesier, P. J. (2003). The Internet, Innovation, and Intellectual Property Policy. 103 Colum. L. Rev 534.

Macbeth tragic hero Essay -- essays research papers

Tragic Hero or Villain?   Ã‚  Ã‚  Ã‚  Ã‚  MacBeth the play is considered a tragedy and every tragedy needs a tragic hero. There are many factors that caused the degeneration of Macbeth. Macbeth is not a villlian in this story he is a tragic hero. The major factor that started the downfall was the prophecy by the witches in Act 1, Scene 3.   Ã‚  Ã‚  Ã‚  Ã‚  The witches were praising Macbeth. The first witch said, â€Å"All hail, Macbeth! Hail to thee, Thane of Glamis!† The second witch said, â€Å" All hail, Macbeth! Hail to thee, Thane of Cawder!† The third witch said, â€Å"All hail, Macbeth! That shalt be King hereafter!† When Macbeth and Banquo are leaving the witches Banquo is told that he won’t be King but his son’s will be.   Ã‚  Ã‚  Ã‚  Ã‚  In the middle of Act 1 scene 3, Ross tells Macbeth that the Thane of Cawdor is being executed and he will be taking his place. Now Macbeth believes the prophecy told by the witches. He hasn’t quite figured out how he will become King. One of the things that could have also contributed to Macbeth’s downfall is that he is too vulnerable and he believes everything that he hears. The witches corrupt Macbeth’s character and make him power hungry.   Ã‚  Ã‚  Ã‚  Ã‚  In Act 1, Scene 5 Macbeth wrote a letter to Lady Macbeth. Lady Macbeth has a crazy idea; the King is staying in their castle, giving Macbeth a chance to kill the King and become King. Lady Macbeth corrupts Macbeth even more by putting ideas...

Ballet & How Are Ballet Dancers Trained?

Raise your arms and bring your fingers together over your head. Now lift one foot, point your toes, and strike a pose. You are doing ballet. Ballet is a form of dance with graceful steps and arm movements as well as leaps and spins. We also use the word ballet to describe a story performed to music, using ballet dance techniques. Ballet performances include not only dance and music but also costumes and scenery.Some of the most popular ballets are Swan Lake, The Nutcracker, and The Sleeping Beauty. HOW ARE BALLET DANCERS TRAINED? Girls who study ballet generally begin by age eight to ten.Boys often start later. Ballet training is hard work. Ballet students must develop strength, balance, and flexibility as well as grace. They must learn a set of movements and gestures. Girls also learn to dance on their toes. They usually begin pointe (tip-of-the-toes) work after three years of training. All ballet students practice five basic positions of the feet. These five positions form the basi s of almost all ballet steps. All of these positions are performed with the legs turned outward at the hip. The feet should be able form a straight line on the floor.The turned-out position gives a dancer a more pleasing â€Å"line. † Line has to do with the placement of the dancer’s body, in motion and at rest. All parts of the dancer’s body must be placed in the correct position to achieve good line. Training can improve a dancer’s line. Good line gives a dancer the greatest stability and ease of movement. It also makes the dancer’s body seem light in weight. All dancers take daily classes to keep their bodies flexible and strong. Most classes begin with warm-up exercises at the barre, a railing that dancers hold onto for support.The second part of the class consists of slow exercises that develop balance and fluid (flowing, not jerky) motion. After this, dancers practice quick movements, such as small jumps and leg extensions, and then large ste ps, turns, and leaps. WHO CREATES BALLETS? Ballet dancers work with their bodies to perform the movements in a ballet and achieve dramatic effects. The choreographer is the person who decides what movements the dancers will execute. The choreographer chooses a story or theme for the ballet. He or she also decides on the music. Sometimes, the choreographer uses music that is already written.Sometimes, music is composed specifically to accompany a new ballet. Choreographers may create ballets for specific dancers. In that case, they try to show off what these dancers do best. WHY SO MUCH FRENCH? The language of ballet—its rules and steps—developed over centuries. The steps were first named in France, and they have kept their French names. For example, when the body spins on one foot, the step or movement is called a pirouette. This French word once meant a spinning top. A pas de deux, meaning â€Å"step for two,† is a dance for two dancers. En pointe, on the tip o f the toes, comes from French words meaning â€Å"on point. †

Internet Influence on Youth in Egypt and the Arab World

? Internet influence on youth in Egypt and the Arab world The Executive Summary The internet is considered as one of the most important and the fastest access to information, and for knowing the latest evolutions in different fields; with a relatively low expense, by comparing it with the other traditional ways, as journals, books and magazines.And with the worldwide increasing diffusion of the internet, and its uses, both, positive and negative, and the appearance of the e-crimes' era; it became necessary to know the Arab world's and the Arabic language's portion from the internet uses, in terms of the number of users, and the bulk of the Arab content on this network, accompanied with the acquaintance of the mechanisms and the ways adopted by the international society, the Arab world, and Egypt in chasing the e-crime and confronting it.This paper aims to discuss the extent of spread of the internet using in Egypt and the Arab world, besides the extent of the e-crimes ‘diffusio n in the Egyptian society, and ways of confronting it, in the light of some Arab and foreign countries' experiments, and also attempting to know the Egyptian youth and the parents' opinions about the most important positives and negatives of using the internet, trying to put a conception on how can the society confront such negatives and internet crimes.The study was able to know the positive sides for using the internet, which includes the allowance of information in different fields for internet users, and facilitating reading the world news, and communicating with others in non-traditional ways, through chat rooms ? or e-mail, or other modern ways, which was given by the internet to its users, in addition to the possibility of distance education and training, and also distance working through the internet, which broke the barriers between countries.Despite the above-mentioned advantages of the internet, but it's not void of – as any modernized technology- faults and negati ves, which can be divided into absolute negatives, as using the internet in order to inroad upon others and libel them, and also stealing banks and money laundering crimes, and into relative negatives, which damages differ according to the habits of people and societies, and the prevailing norms in it, beside the extravagance in using the websites of songs, games and chatting, which kill time and isolate the individual from his social surrounding.And about the widespread use of the internet in the Arab world, the study concluded that there is a gap in the proportion of internet users in the Arab world, by comparing it to the global level, where internet users in the Arab world are only 1. 4% of the total internet users in the world in 2005, while the Arab population is 5% of the world's population.In addition to that, the information content on the Internet does not represent more than 1% of the information content on the Internet. The Internet use in Egypt has started in nineties, and the number of users in 1996/1997 was about 75 thousand user. With the establishment of the Ministry of Communications and Information in 1999 and a result of the efforts made in this area, the number of internet users became 4. 4 million in 2004.