Chemistry assignment Essay Example | Topics and Well Written Essays - 1750 words

Chemistry assignment - Essay Example Thus we must multiply 3 to get the integers 3 and 4, for Fe and O subscripts respectively. This is the simplest, or empirical, formula because the subscripts are the smallest integers that express ratios of atoms present in the compound. Certain elements appear to violate the rules in electron configuration. The electron configuration of chromium is rather than , as one might have expected. Similarly, the configuration of copper is instead of . This anomalous behavior is largely a consequence of the closeness of the 3d and 4s orbital energies. It frequently occurs when there are enough electrons to lead to precisely half-filled sets of degenerate orbitals (as in chromium) or to completely filled d subshell (as in copper). Increasing the distance from the nucleus decreases the attraction between the electrons and the nucleus. As this attraction decreases, it becomes easier to remove the electron and, thus, lower ionization energy. Element A has the largest atomic number (greatest distance between outer electron and nucleus) because it has the least ionization energy. The ionization energies for an element increase in magnitude as successive electrons are removed. But when the next electron removed is an inner-shell electron, there is a sharp increase in ionization energy. The figure shown below tells us which group elements A-E should be placed. 19. 27.823g of Na2CO3.xH2O crystals were dissolved in water and made up to 1000 cm3 of solution. 25 cm3 of this solution required 48.8 cm3 of 0.1 mol dm-3 HCI for complete neutralisation. Find the value of x in Na2CO3.xH2O using the following steps: 20. 4.00g of lawn sand (a mixture of sand and ammonium sulphate) was weighed into a conical flask, and 25 cm3 of 2.0 mol dm-3 sodium hydroxide solution was pipetted into the same flask. The conical flask was boiled for 20 minutes, after which time all the ammonia had been driven off,

Decision Making using Critical Thinking Techniques Part 3 Essay

Decision Making using Critical Thinking Techniques Part 3 - Essay Example In the establishment of a store, an even greater amount will be needed to execute the plan. Another company resource that will affect the implementation of the decisions chosen is the human resources. People are needed to put into action the health program for coffee farmers. People need to be hired to handle the operations of new stores. Aside from the company resources, another factor which will affect the decision implementation are the laws and regulations of Kava. Initiating a health program for coffee farmers might require some permits from the government. Furthermore, it would be better if the program is done in coordination with government agencies. In the case of the putting of new branches in Kava, the company will have to get business permits and the other requirements needed to do business in Kava. The geographical, economic, cultural and political aspects have some influence too in the strategy implementation. Being disaster prone, the health program envisioned by the company will be affected by diseases that are brought about by calamities. The company should then be prepared for this. The decision to put a store is also affected by the geography of Kava. They should know which parts of Kava are typhoon belts and earthquake prone areas. The diverse culture of Kava plays an important role in the decision implementation. It is possible that some coffee farmers still stick to traditional tribal healing practices; thus, may not welcome the idea of having health assistance from Western medicine. The culture will also determine the product offerings of the store. The economic and political situation of Kava will influence the strategies to be implemented in relation to the decisions to develop a health program and to increase the company’s branches. The economy will dictate the purchasing power of the Kava people. The peace and order situation will also affect the amount of investment which the company will