...Limiting Reactant (Experiment #8) CHM 1045L Lucy Garcia Misturah Abdulkareem, Alexander Gonzalez, Oluseun Fajimolu Dr. Abuzar Kabir Purpose/Abstract The purpose of this lab was to determine the limiting reactant in a mixture of to soluble salts and the percent composition of each substance in a salt mixture. Procedure/Method First, we were to measure and record the mass of a beaker, then transfer about 1 gram of the salt mixture into the beaker, measure, and record the combined mass. Then, we had to fill a 400-ml beaker with deionized water and test it to make sure that the ph was just basic. We then combined the deionized water and salt by adding about 150ml of the deionized water to the salt mixture. We then stirred the combined mixture for about 2-3 minutes and then let it sit so that the precipitate would settle. After it settled, we covered the beaker with a watch glass and warmed it up on a hot plate at 75C for about 15 minutes, periodically stirring the solution. After 15 minutes, we removed the beaker from the heat and allowed the precipitate to settle again. While we waited for the precipitate to settle, we prepared wash water by heating up about 30 ml of deionized water at 70-80C. We then placed filter paper in a filter funnel to set up gravity for filtering. On the side, we took some of the solution’s supernatant and half-filled two test tubes using a pipet. Thereafter, we took the rest of the solution started...
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...NO(g) + H2O(g) (b) GaBr3(aq) + Na2SO3(aq) → Ga2(SO3)3(aq) + NaBr(aq) 2. Ethanol, C2H5OH, is a liquid with a density of 0.789 g ml-1 at 25 °C. Calculate the molarity of ethanol solution made by dissolving 20.00 mL of ethanol at 25 °C in enough water to make 250.0 ml of solution. [Ans: 1.37 mol L-1] 3. Copper sulfate is widely used as a dietary supplement for animal feed. A lab technician prepares a “stock” solution of CuSO4 by dissolving 79.80 g of CuSO4 in enough water to make 500.0 mL of solution. (a) Determine the molarity of the CuSO4 “stock” solution prepared by the technician. [Ans: 1 mol L-1] (b) Calculate the volume of CuSO4 “stock” solution that should be diluted to give 2.5 L of [Ans: 0.25 L] 0.1 M CuSO4. 4. Aluminum is a limiting reactant in the reaction with sulfur gas to form aluminum sulfide. Initially, 1.18 mol of aluminum and 2.25 mol of sulfur are combined. 2Al(s) + 3S(s) → Al2S3(s) (a) Calculate the aluminum sulfide formed in moles. (b) Calculate the mass of the excess reactant after the reaction. [Ans: 0.59 mol] [Ans: 15.39 g] [December 2013] 1 5. A mixture of excess carbon disulphide, CS2, and 650 cm3 of 9.2 g dm-3 chlorine, Cl2, are passed through a hot reaction tube to form tetrachloromethane, CCl4, as below: CS2(l)...
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...Children and Television Introduction: This research aims at shedding light on the effects that television has on children, both good and bad, and also on how parents feel about their children’s TV watching habits. It will therefore, rely on most information that has been provided by parents. Television and media as a whole are very powerful factors in not only children’s development but also in most adults lives, even though they can be beneficial to us constant concerns from the different media houses about the risks and harms associated with them can leave many parents feeling insecure and overwhelmed. This research aims at navigating through the contradicting reports and advice and establishing a balance between the two. Conclusion: In conclusion, we observe that it is fundamentally the role of parents to make good choices that will influence their children’s development positively. They are therefore, deemed to be responsible and take control of what their children view. They can do this through various methods, some of which include; balancing the time spent watching TV against other healthy and enriching activities, choosing programs that go together with the child’s interests limiting the time spent watching TV, viewing some programs together with the children so as to explain and clarify some areas of importance to them, using TV to capture the child’s creativity and then supplementing that with trips to the library for more reading, adopting the use of the red...
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...Vizio is a relatively nascent player in the flat panel television industry. It has witnessed tremendous growth within the industry and, in turn, has seen sales multiply by approximately more than ten-fold within a three year span. This analysis will examine the flat panel industry’s competitive landscape, the success of Vizio’s strategy, and whether Vizio’s strategy is sustainable for the long term prospects of the company. To get a better understanding of the flat panel television industry, let’s consider the competitive forces. When we consider buyers, there are two groups to keep in mind – the retailers (Walmart, Best Buy, etc.) and the consumers. As it stands today, there is not much price elasticity for consumers. They tend to purchase based on brand recognition. Televisions tend to be a fairly significant investment for the average household and quality, especially with the introduction of high definition, seems to be of paramount importance. Hence, companies that have developed a strong reputation for quality have historically done well. With that being said, flat panel televisions are becoming more popular and the industry continues to grow. In terms of channels, consumers are starting to buy more televisions from large discount retailers, which allows some smaller producers to be appeal to a more price conscious customer base. Suppliers comprise of companies that sell components and manufacturers that assemble these components. The article suggests that suppliers have...
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...The Impact of Caregivers Using Television as a Babysitter Composition and Communication II Comm/156 August 19, 2012 The Impact of Caregivers Using Television as a Babysitter Caregivers using television as a babysitter adversely impacts the growth and development, physical fitness, and social life of children. The American Academy of Child and Adolescent Psychiatry (AACAP) stated, on average a child in America watches three to four hours of television a day (AACAP, 2011). This happens in most households because caregivers tend to have children watch television to be occupied. The problem with this is children are not getting the interaction with others that is needed to advance their social skills. Watching television and not going outside to play takes away the ability to get in the required exercise that is needed, therefore, leading to childhood obesity. Working, busy, or unconsciously aware caregivers are letting children sit in front of the television hours upon hours to entertain themselves. Whether caregivers are using television as a babysitter so they can do other things, to take a break from entertaining children themselves, or as a learning tool; television should be watched in moderation because it impacts the growth and development in children. The first two years of brain development are the most important. This time period is when children are learning to talk and play. The American Academy...
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...The Issue of Media Influence on Our Children Ever since the first televisions made their way into American homes in the 1950s, people have been concerned about what their children watch and how it affects them. There is good reason for such concern, as the impact that television has on our children can be astounding - it is said that children are exposed to a violent act every three seconds when they watch cartoons. Although exposure to violent content is one problem media presents, it is not the only one. The messages, which children are being fed via television and social media outlets, are also a good cause for concern. While these problems are pervasive in today’s ubiquitous media avalanche, there are solutions at hand. Having an ongoing and healthy dialogue with children about media content, paying attention to and being selective about what media children are exposed to, encouraging more physical than sedentary activity and promoting self-esteem are very real weapons against the potential onslaught of media’s negative influence. Research dictates the negative impact mass media has upon our children. For example, an article in Science Daily reads: “Fame is the No. 1 value emphasized by television shows popular with 9- to 11-year-olds, a dramatic change over the past 10 years, UCLA psychologists report in a new study. On a list of 16 values, fame jumped from the 15th spot, where it was in both 1987 and 1997, to the first spot in 2007. From 1997 to 2007, benevolence...
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...about whether or not media, television and video games, have an effect on our children, well I definitely believe that it does. People used to be able to drive down the road and see children playing and having fun but since video games were invented, children would rather stay inside and play their games than go outside and play. Being less active can create many problems, such as weight gain, other health issues, being socially isolated, and some children even become violent after watching the violence on television or playing violent video games. So should we or shouldn’t we limit their television and video game time? What would be the pros and cons if we do or don’t limit their time? Some research shows that there is no difference in children after watching violence and playing violent video games and then there is other research that states that it does, have an impact on the behaviors of children. According to psychologists L. Rowell Huesmann, Leonard Eron, “Children who watched many hours of violence on television when they were in elementary school tended to show higher levels of aggressive behavior when they became teenagers.” (para. 3) Children who play video games and watch a lot of television tend to gain weight because they are in front of the television all day and either not eating much or snacking on bad foods and drinks instead of being outside and being active. “The nutritional value of food and drinks advertised on children’s television programs is worse than...
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...How Media Effect Children Franchester White Eng/101 September 7, 2014 Karen Strimkovskey Is your child safe? As a parent, you always want to know what your child is watching on television. The media is a powerful tool that doesn’t always teach a positive lesson. Media have provided the means and opportunity for children to distort reality into fallacies through television and video games. While media programs have a negative effect on children, there are some positive programs. The largest amounts of violence are found in children shows. Children between the age of 2 and 18 spends 6 hours and 32 minutes on an average a day using media with the exception of sleeping this is more than they spend on any other activity. When multiple media is stimulated, this time is increased to 8 hours a day. Big parts of media exposure are violent acts that are also witnessed in video games. On an average, a young child will have viewed 200,000 acts of violence on television (TV). Exposure to violent media wrecks havoc on thoughts, feeling, and most importantly, behavior. “The Influence of Media Violence on Youth,” a report appearing in the December 2003 edition of “Psychological Science in the Public Interest,” points to strong evidence points to the exposure to media violence causes boost in physically and verbally aggressive behavior in children. “Extensive research evidence indicates that media violence can contribute to aggressive behavior...
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...MUHLNICKEL MR. DAVID KERWIN EN 1320 AUGUST 27 2013 Many Americans feel that the viewing of violence in the media reinforces negative behavior in society, especially among children and young adults. "Three thousand studies have been done since 1955 on the link between television and violence; 2,980 of them found a correlation between the two. We hear little about that because we get most of our news from television" (Peterson). With this much research one must acknowledge that there is a problem in America involving sex and violence in the media. We cannot blame all societal problems on the media and its portrayal of these issues, but we can become educated, ourselves, in order to better facilitate the healthy lives of our children. "Violence grabs the headlines, but violence itself is a result of a society that promotes selfishness, greed and instant gratification" (Peterson). Violence on public television often catches us in a serious debate. Concerned parents fear that viewing inappropriate images presented by the media will corrupt America's youth. They cringe at the idea of our nation's children growing up to be vicious killers due to the brutal violence often seen on TV. Some blame television for most, if not all, of the ills of society and its children. "Truly it accounts for about 10 percent of violence, which means that 90 percent is caused by other things," Leonard Eron says. "Violence is a multi-determined behavior. It's caused by genetic, biological,...
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...How TV Affects Your Child Television watching is becoming more prominent in America culture. Children are being plugged into the television at younger and younger ages. Each day after school, thousands of kids sit in front of their T.V. sets at their homes and kill their precious time watching T.V. programs when they should be active or doing homework, etc. Parents will want to get work done and the television is a very convenient “babysitter.” Parents do not have to pay the television to keep their children pre-occupied. However, too much television can be detrimental and I believe television viewing should be used in moderation or as a privilege. There are many reasons why parents should limit screen time for their children. One important reason is that watching a lot of television can lead to childhood obesity. Part of the problem is that the child is not moving when watching. When children spend their free time lying around watching TV, they don't get the exercise they need. It's hard to exercise in front of the TV set. The other part is all the food commercials aimed at kids. TV commercials advertise candy, soda, and sugary cereals, encouraging children to eat high-calorie junk food. Even if they don't get the food on the commercial, it will probably lead them to the kitchen, looking for a snack. Often, children eat junk food while watching TV and are unaware of how much they're overeating. Down the long run, childhood obesity can lead to numerous health problems...
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...Television has extended its own self to be familiar with many technologies, spreading its technological alliances to become even more part of our lives. When the shift in technology from analogue to digital became apparent, a decoder was made for the masses to receive television that previously had to be paid for in subscription. The digital box extends the amount of channels sent on one signal, increasing the media coverage and which in turn “creates extensions of the human body and senses” according to McLuhan, every extension has an amputation. The digital box is an over extension of the television, it has become part of television to extent senses and body for the masses. This has established a wider connection, forming a larger global tribe and opening up more space for information from the media to the senses. The demand for constant supply of content has distorted our global view, everything must be simultaneous and we must be involved in everything. Everything we must be involved in is shown on digital television. The chances to connect with more people than before is immense, their visions and their ideas are now at the forefront of our technology. In theory this should extent the broadcasting systems to reach more people and more people, creating a clearer view of the world. As McLuhan has put it “the electronic age’ has sealed ‘the entire human family into a single global tribe.” This should reach out as a united front connecting every singular person through the...
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...formats. Media is everywhere in our daily lives, in television, motion pictures, and radio, influencing what society consume to what society wear. “Media is a very powerful tool capable of mobilizing people’s contemplations and ideologies” (Mock 2004). Most people find television an escape from their hectic daily lives. In our society today, there is an ongoing debate about violence in the media. Media violence has been an issue that most of the literature seems to avoid, but it is important in our lives. To give you perspective on just how much violence kids see on TV, consider this: “The average American child will witness 200,000 violent acts on television by age 18. Kids may become desensitized to violence and more aggressive. TV violence sometimes begs for imitation because violence is often promoted as a fun and effective way to get what you want” (Kids Health, 2010). With this one can see how much of an influence T.V has on kids. As the teens and kids continue to watch and read these violent images depicted in music and film, detrimental effects affect their judgment, attitudes, and behaviors. Concerns about media violence have grown as television has acquired a global audience. While TV violence is not the only cause of aggressive or violent behavior, it is clearly a significant factor. Television can be a powerful influence in developing value systems and shaping behavior. Unfortunately, much of today's television programs include violent images! The impact of TV violence...
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...T e l e v i s i o n V i o l e n c e a n d Its Effect o n C h i l d r e n Merrilyn O. Johnson, MSN, RN Television (TV) has become a large part of children's activities. Much discussion exists as to the level of violence on TV programs and its effect on children's behavior. This article reviews the literature, discusses social issues, and presents some interventions available to nursing professionals to assist children and families in coping with the impact of TV on children's lives. Copyright 9 1996 by W.B. Saunders Company For some children under some conditions some television is harmful. For other children u n d e r other conditions it may be beneficial. For most children under most conditions most T V is probably neither particularly harmful nor particularly beneficial. Schramm, Lyle, and Parker (1961) ago, the A LTHOUGHasWRITTEN 33 yearswas then. above quote on television (TV) viewing and children is relevant today as it Does watching violence on TV increase or alter the antisocial or aggressive activity of children? The possibility that widespread watching of violent TV programs by children and youth is increasing the level of violence in American society continues to be the most controversial and emotionally arousing issue related to the TV medium. This is because the concentration of violence portrayed on TV has the potential of generating aggressive behavior, both immediately and in the long term (Joy, Kimball, & Zabrack, 1986, cited in Williams, 1986).Aggression...
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...WST ESSAY TOPICS 1. Some people believe that politicians or celebrities have a right to keep their personal lives private, while other people believe that the public has a right to know about the private lives of these people. Should the media cover the private lives of public people? Make sure you support your position with reasons, explanations, and examples. 2. Some people believe that watching television is a worthless or meaningless activity, while others view it as a valuable way to relax or gather information. Is watching TV a valuable activity? Make sure you support your position with reasons, explanations, and examples. 3. Some people believe that television news gives a wide audience access to information that would have been impossible a hundred years ago. Others, however, believe that TV news provides shallow and biased news coverage. Does the television news give fair and in-depth coverage to important issues of the day? Make sure you support your position with reasons, explanations, and examples. 4. Some high school teachers think that assigning their students low grades will prevent them from being accepted into college and consequently assign many A’s and B’s. In contrast, other teachers think it is important to recognize a broad range of individual differences in academic performance and assign grades according to what is actually earned. Should teachers assign mostly high grades to students whether or not they earned them with their academic work? Make...
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...The Negative Aspects of Multi Media Katie McMullin Breckinridge School of Nursing The Negative Aspects of Social Media The influence of media on children today is profound. Today’s society is dependent upon multimedia daily. Media comes in many forms such as television, internet, video games and music videos. It effects children in many ways and has been known to cause depression, aggression, isolation and nutrition deficiency. Advertisements influence how our children preserve themselves and make them susceptible to alcohol, smoking and sex. The negative aspects of multimedia have left our children without the proper tools to live life without electronics. This leaves our youth not having the skills to communicate face to face without Discomfort, anxiety. Depression, aggression, and the feeling of isolation. Television Television has the potential to be beneficial or harmful to children. The benefits to watching TV is that there are educational shows such as Animal Planet, documentaries and some educational cartoons. For these purposes the TV can aid in the development of our children but where do the parents draw the line? TV is not being watched for beneficial purposes and turn into a negative aspect in our children’s lives. It has been shown that people have little brain activity while they are watching TV. According to The Journal of Cognitive Liberties “For a brain to comprehend and communicate complex meaning, it must be in a state of “chaotic disequilibrium...
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