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.

The Bible Code essays

The Bible Code essays The Bible Code is a report of the discovery concerning certain codes hidden in the Bible that are able to foresee events. The code was first broken by an Israeli mathematician, Dr. Eliyahu Rips, and has been confirmed by famous mathematicians around the world. The three-thousand-year-old code foretells events that happened thousands of years after the Bible was written. It foresaw both Kennedy assassinations, the Oklahoma city bombing, the election of President Bill Clinton, everything from World War II to Watergate, from the Holocaust to Hiroshima, and from the Moon landing to the collision of a comet with Jupiter. In an extremely complicated procedure, Israeli Doctors Doron Witztum, Eliyahu Rips, and Yoav Rosenburg, were the first to search and analyze the Bible for secret codes that reveal the future by using equidistant letter sequences and statistical analysis. The Israeli researchers made careful examinations and developed a collection of hypothesis, a collections of maybes. Statistics provided the tools to test each and every one these maybes. A hypothesis in mathematics may be declared false by the presentation of a single example, which violates the hypothesis. The very first thing the researchers did when they started their investigations was to make observations. They grouped their observations and formulated a hypothesis. Then, they tested the hypothesis. For example, a very common idea in statistics is the concept of average. As a very simple proof we would declare false a value for an average height for people of 10 feet. We all know that an average height of 10 feet is definit ely not possible. Definitely, we can say that the concept of average participated in the analysis and conclusions when the Israeli researchers investigated the letter and word sequences they found in the Bible Code. Other statistical concepts that are easy to grasp a ...