Isotopes And Atomic Mass Essays - Chemistry, Nature,

Isotopes and Atomic Mass Objective: 1. Determine the average weight of each isotope of the fictitious element vegium. 2. Determine the relative abundance of isotopes of vegium. 3. Calculate from experimental data the atomic mass of vegium. Materials: A sample of vegium on a plastic cupsmall-scale balance Procedures: 1. Weigh all the beans, all the peas, and all the corn. 2. count all the beans, all the peas, and all the corn. 3. Divide all the mass of each by the isotope (beans, peas, and corn) by the number of each isotope to get the average mass of each isotope. 4. Divide the number of each isotope by the total number of particles, and multiply by 100 to get the percent abundance of each isotope. 5. Divide the percent abundance from step 4 by 100 to get the relative abundance of each isotope. 6. Multiply the relative abundance from step 5 by the average mass of each isotope to get the relative weight of each isotope. 7. Add the relative weights to get the average mass of all particles in vegium, the "atomic mass." Note: When you weigh the various types of vegetables, you may encounter some problems. For example, the sample of beans might be too large to weigh on your balance. You might solve this problem by making more weights or by using a larger counterweight on your balance. This approach increases your balance's capacity. Keep in mind that it also results in a heavier beam, which reduces the sensitivity of your balance. Alternatively, you might weigh a portion of your vegetables, say half, and then multiply your result by two (or a fifth and multiply by five). The beans are various in sizes, so if you weigh just one bean, and multiply by the number of beans to get the total weight of beans, a significant error might result. Weigh a large enough sample so you get a good estimation of the average weight of a bean. Data: BeansPeasCorn Total Mass of each isotope19.2g15.2g36.1g70.5g Number of each isotope68186216470 Average mass of each.2823529g.0817204g.1671296g.15g Percent of each14.468%39.574%45.957%99.999% Relative Abundance.14468.39574.45957.99999 Relative Weight.0408508g.032407g.0768078g.1499985g Analysis: We followed the directions listed in procedures. To get the Relative abundance, we divided by 100. About the same as moving the decimal to the left 2 places. To ensure that the answers were right, the percent of each is supposed to be as close to 100% as possible. We came very close. Conclusion: In determining we found all the averages of the weights of each isotope. In calculating the experimental data the atomic mass of vegium, we answered that question successfully. And in the second determining, we determined the relative abundance of isotopes successfully. SOE: 1. While counting the beans, there were more than 450 total pieces, so while counting we could have miscounted because the half-peas looked a lot like corn. 2. While weighing, we had to tare the beaker, This can sometimes prove to be inaccurate. 3. The percent of each row, the total is 99.999%, to be 100% accurate, the number has to be 100%. This proves that somewhere down the line, we didn't calculate right. The probable cause for this is that we didn't list all numbers. The real numbers were over 10 characters long, we used SigFigs.

Free Essays on What Is Heritage

What is Heritage? In â€Å"Everyday Use,† the theme revolves around presence of heritage. Dee wants to take on the heritage of African decent. But her mother and Maggie realize that the real heritage lies in the everyday traditions that they practice. They use many things in the story as a part of their everyday traditions. The churn top, dasher, and quilts all are symbolically linked to the heritage of this family. Heritage is a tradition. Something passed down from generations that come before. A person determines their heritage by the traditions they learn from their parents and other elders. You cannot claim a heritage in which was not brought down to you through your family. Dee came home with a new name. Dee states her name has changed saying, â€Å"No mama, not Dee. Wangero Leewanika Kemanjo.†(175) She takes a new African name. She is beginning to claim the heritage of an African from Africa. In leaving her home she has forgotten her family traditions and now takes an African one. She comes back to her mother’s house with all these ideas of being a culture before her time. Her name change is a symbol of her giving up her traditions of an African American for one of a Native African. In taking this new name she is denying the heritage she was brought up on and claiming another she was not taught. Dee also sees things in her mother’s house and wants them for artistic decoration. One thing Dee was taking was the churn top. Dee asks her mother â€Å"Didn’t Uncle Buddy whittle is out of a tree you all used to have?†(177) This was something that a family member made by hand. Dee wanted it for decoration to show her heritage. In wanting it she did not realize the value of it. Her mother and sister use this top in everyday use. They need it to make their butter. Bacchus 2 Dee wanted it because she thought it would make a nice centerpiece for her table. She was trying to get things to remind her of a heritage... Free Essays on What Is Heritage Free Essays on What Is Heritage What is Heritage? In â€Å"Everyday Use,† the theme revolves around presence of heritage. Dee wants to take on the heritage of African decent. But her mother and Maggie realize that the real heritage lies in the everyday traditions that they practice. They use many things in the story as a part of their everyday traditions. The churn top, dasher, and quilts all are symbolically linked to the heritage of this family. Heritage is a tradition. Something passed down from generations that come before. A person determines their heritage by the traditions they learn from their parents and other elders. You cannot claim a heritage in which was not brought down to you through your family. Dee came home with a new name. Dee states her name has changed saying, â€Å"No mama, not Dee. Wangero Leewanika Kemanjo.†(175) She takes a new African name. She is beginning to claim the heritage of an African from Africa. In leaving her home she has forgotten her family traditions and now takes an African one. She comes back to her mother’s house with all these ideas of being a culture before her time. Her name change is a symbol of her giving up her traditions of an African American for one of a Native African. In taking this new name she is denying the heritage she was brought up on and claiming another she was not taught. Dee also sees things in her mother’s house and wants them for artistic decoration. One thing Dee was taking was the churn top. Dee asks her mother â€Å"Didn’t Uncle Buddy whittle is out of a tree you all used to have?†(177) This was something that a family member made by hand. Dee wanted it for decoration to show her heritage. In wanting it she did not realize the value of it. Her mother and sister use this top in everyday use. They need it to make their butter. Bacchus 2 Dee wanted it because she thought it would make a nice centerpiece for her table. She was trying to get things to remind her of a heritage...

Human Resource Management Term Paper Example | Topics and Well Written Essays - 750 words

Human Resource Management - Term Paper Example Many employees are unable to balance their personal life with their work and this mix up is often the leading cause of stress amongst the employees. This also contributes to reduced performance as an employee fails to concentrate in the workplace as a result of the interference with the personal life. If the company is able to provide an environment where employees are able to balance these two different but yet demanding aspects of themselves and blend them to work in unison almost perfectly, then the employees will concentrate more in their work and increase their performance. They will also be in a better position and state of mind to deal with their personal lives and any crisis they may be undergoing without it interfering with their work. Resilience training is where the employees are presented with many different challenges in their workplace in a form of training and are taught how to handle all these challenges without them breaking their work spirit or enthusiasm and without having to show it to their customers as it might affect the feedback. The training is meant to make them much more focused in their work despite what is happening in the surrounding. It will enable them improve their decision making ability in order to enable them make the best decisions at all times. The resilience training is also meant to improve their clarity of problems, crises and challenges in the workplace as well as be more creative and especially when pressed with other matters. Work is done in the same way all the time creates monotony and minimizes or completely kills motivation of the employees in the workplace affecting negatively their performance and productivity of the organization. When the employer creates different opportunities which will make the workplace much more interesting hence reducing the monotony, the employees start valuing and enjoying their work. When employees feel valued and enjoy