Choose an element and research its properties and uses. You must use Essay

Choose an element and research its properties and uses. You must use at least 2 reliable sources for your information. I do not want a list of properties; it must still be in paragraph format - Essay Example Magnesium can never be found in its natural free state because of its highly reactive nature and forms compounds readily such as magnesium oxide, magnesium hydroxide, magnesium carbonate and magnesium fluoride. The melting point for magnesium is 1,200 °F and turns into a gas at 2,025 °F. It is 1.74 times denser than water (Uttley 2000). Burning of magnesium initiates a bright white light and ignites at 650 °C (Krebs 2006). Magnesium harbors a variety of helpful functions in the industrial and chemical world. Magnesium due to its bright flame properties is used in aerial flares and was used as aerial firebombs during war. Magnesium is considered a good construction metal and is used in aircrafts, space and automobile industries. Magnesium is also used in the process of thermal reduction to produce other metals such as zinc, nickel and zirconium. Milk of Magnesia is used as an antacid; magnesium in Epsom salts is used as laxatives and for treating laxatives and Epsom salts are also used for tanning leathers (Krebs 2006). Chemistry is not merely the science of matter and studying different interactions and energy processes of matter, it also makes use of the knowledge to incorporate it in the daily life activities for human benefit. The study of different properties of Magnesium and the ability of magnesium to form an array of compounds enables it to be used for a plethora of purposes in the automobile and aircraft industries, pharmacological uses, leather factories, chemical industries and war-related purposes. Krebs, Robert E.  The History and Use of Our Earths Chemical Elements: A Reference Guide. Westport, Conn: Greenwood Press, 2006. Print. Uttley,

Quantitive analyse Essay Example | Topics and Well Written Essays - 1000 words

Quantitive analyse - Essay Example There appears very strong linear relationship between income and age, as the data points lie (cluster) around a straight line. There appears very week (or no) linear relationship between income and degree. However, the scattergraph is inconclusive, as there are two values for degree Arts (0) and Science (1), only. In a bivariate regression, R2 is a measure of the correlation coefficient r. Correlation coefficient value near 0 indicates there is little (or no) association between the two variables and a value near 1 indicates a strong association between the two variables (Lind, Marchal and Wathen, 2009). Using correlation coefficient, R2 can be calculated as below The regression slope coefficient of 0.771 suggests that every year increase in fulltime-employed adult’s age increases income by about  £771, on average. The regression intercept coefficient of 4.860 is not meaningful in the context of this problem because there will be no employee with 0 years age. The value of coefficient of determination, R2 is 0.9797. This suggests that fulltime-employed adult’s age explains about 97.97% variation in income. Only 2.03% variations in income remains unexplained. The regression slope coefficient of -2.35 and intercept coefficient of 37.71 suggests that Science degree decreases fulltime-employed adult’s income by about  £2,350 as compared to Arts degree. Arts fulltime employed adult’s income is  £37,710, on average. The value of coefficient of determination, R2 is 0.0183. This suggests that fulltime-employed adult’s degree only explains about 1.83% variation in income and 98.17% variations in income remains