The results of the experiment show a percent yield of 34.34% for the first trial (Part A), and a percent yield of 84.0% for the second trial (Part B). The methods for both trials were generally the same, so the large difference is attributed to the fact that the beaker broke before the gravity-filtering step in the first trial. The beaker was attempted to be picked up by the beaker tongs, but as the hot solution was being poured into the filter, the beaker slipped out of the beaker tongs and shattered, leaving some of the product unfiltered and thus not accounted for in the final product. Although the methods were generally similar in both steps, the gravity filtration step was skipped over in the second trial, which may have accounted for the missing 16% in trial 2, but may have also accounted for the overall relatively high percent yield for this trial. Luckily, the actual melting point of benzoic acid fit within the recorded average…
Complementary Metal Oxide Semiconductor, or CMOS, is a widely used type of semiconductor. CMOS semiconductors use both NMOS(negative polarity) and PMOS(positive polarity) circuits. Since only one of the circuit types is on at any given time, CMOS chips require less power than chips using just one type of transistor. This feature makes them convenient for use in battery-powered devices such as laptops. Personal computers also contain a small amount of battery-powered CMOS memory to hold the date, time, and the system setup parameters. To access the CMOS on most computers, press the delete key as the computer is booting.…
There are many reasons why the percent recovery is much less than 100%. For example, one source of error may have been that the separatory funnel containing the acidified phenylalanine and ethyl acetate may not have separated well enough after being shaken together in the funnel. Not allowing an adequate amount of time for the aqueous and organic layers to separate will cause portions of the layers to be contaminated. This would affect the experimental results because when the aqueous layer was drained into a separate beaker, some of the phenylalanine would also drain out too. This would result in a loss of recovered compound. One way that this was limited was by repeating the mixing and draining process two more times; however, one cannot entirely ensure that all of the compound has been removed.…
Application code and comments should be written descriptively. The names of classes, methods and variables should be self-descriptive. Methods and classes will be commented to detail their…
You are to use the SDLC to create a system for mobile security in your organization. The concern revolves around personnel bringing in their own devices and using them. You are tasked with coming up with a project that allows such a system. You are to determine the project requirements and scope. Follow the example in plugin B14 to get started, then chapter 9 and plugin B18 as we go through the class and continue with building on this exercise. For example, consider having the users…
The objective of this experiment was to carry out an elimination reaction on 2-methylalcohol with an acid to produce alkenes as a product. The product formed is separated through distillation. Because more than one alkene product can result from the reaction, Gas Chromatography is used to analyze the composition of the product mixture. IR spectrometry is also carried out to confirm the product.…
The Structure in my compound is: C8H18O2 + 2 ClO- → C8H14O2 + 2 Cl- + 2 H2O…
Appearance of penny in vinegar after 30 minutes: Pretty dark coloured. Quite hard to see…
1.4 Describe how to use an electronic message system to check and delete or discard messages?…
1.4 Describe how to use an electronic message system to check and delete or discard messages…
The primary function of the heart is to transport blood throughout the body, which delivers oxygen, nutrients and chemicals to the cells of the body to ensure their survival and proper function and to remove the cellular wastes. For the body to achieve this, it must maintain a certain blood pressure within the body to overcome gravity and orthostatic changes. If the body did not keep a certain pressure, distal cells and organs would not be able to receive a constant blood supply and cause a homeostatic imbalance. This experiment will show the possible changes in blood pressure due to gravity and orthostatic changes, but first, what is blood pressure and why is it important?…
How is positive parenting different from negative parenting? Which do you think is more effective? Why?…
1. What are some of the reasons why people may not talk to babies as much today as they used to?…
Effective hand washing is the first step in preventing cross infection and the maintaining of hand hygiene is paramount to its control (Gould et al 2008). However, hands are the preeminent route by which HCAI’s will occur (Elliot 1992). In the perioperative environment there are two types of hand washing techniques.…
The evolution in technology caused by the needs especially in business demonstrates that Information System and Information Technology is essential ingredient for success of today’s enterprises. But still, some organizations and offices used the traditional or manual system in managing their information. The Don Bosco High School office, particularly the enrollment committee face tons of work in their daily activities most especially after enrollment because of failure to seek ways and means on how to simplify their task. The tasks are time consuming and sometimes end up with inaccurate reports. Thus, in this paper, the system developers aim to propose a computerized enrollment system specifically of use to the Don Bosco High School Enrollment Committee. According to the website reference.com, a computerized enrollment system is a multi-function processing operation that automatically manages and stores enrollment information. Computerization of enrollment information interrelates different yet interdependent transactions in a systematized and functional way. The use of computerized enrollment systems by organizations to help coordinate people and information is increasing throughout the world. Many experts cite numerous reasons why computerized enrollment systems are viable choices for schools, training programs and workplace operations. Computerized enrollment systems for educational services reduce processing time and human errors. Systems operations proceed faster, more efficiently and with greater accuracy than manual enrollment systems. Systems typically include data protection and backup frameworks. Student enrollees have access to their personal information exclusively. Employee workload is decreased and administrators can spend more time giving students more personalized attention and encouragement. Upon enrollment, new and transferee students will present their credentials to the enrollment…