Virtually‚ computers which pressure most people’s life are considered as the most important technological achievement of the XXI century. Using computers‚ we can make or solve most of difficult things which are hardly completed without their hands. Because of these different varieties of abilities‚ computers have been creating many noticeable achievements in most of societies’ fields especially medicine‚ education‚ and usual life. In other words‚ these three fields also are computers’ influences
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A. Role of Chemistry in Society Applications of chemical science have contributed significantly to the advancement of human civilization (1‚ 2‚ 3). With a growing understanding and ability to manipulate chemical molecules‚ the post-World War II chemist was considered a societal problem solver. They synthesized crop-enhancing agricultural chemicals to ensure a constant and viable food supply. They played a significant role in the eradication of deadly diseases by developing life-saving pharmaceuticals
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abyss hole so deep as to appear bottomless acquiesce agree‚ accept without protest affable polite and friendly‚ easy to talk to affliction distress‚ suffering affluent wealthy‚ abundant agitate move‚ shake‚ stir up ambiguous having more then one meaning annex take possession of aqueous of or like water arduous demanding great effort‚ strenuous aroma quality or surrounding atmosphere considered typical atone make repayment avarice greed bellicose inclined to fighting calisthenics
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Lord Rayleigh and Sir William Ramsey succeeded in proving that there must exist a previously unknown gas in the atmosphere. They subsequently worked in their separate laboratories on this problem but communicated the results of their labors almost daily. At the meeting of the British Association in August 1894‚ they announced the discovery of Argon. They found the gas by isolating a small sample of the nonreactive portion of atmospheric nitrogen; once all the oxygen and nitrogen were removed from
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Calculations 1. Rounding Examples *0.1356 (4 significant figures) -> Round answer to 2 significant figures *0.1356 -> 0.14 *314.705 (6 significant figures) -> Round number to 4 significant figures. *314.705 -> 314.7 *0.0035771 (5 significant figures) -> Round to 3 significant figures. *0.0035771 -> 0.00358 *500‚000 (1 significant figure) -> Write this number to have 3 significant figures. *500‚000 - 5.00 x 10^5 *39.501 -> Round to 2 significant figures. *39‚501
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Appendix APPENDIX 1 Chemical tests for functional groups Homologous series/ Typical compound Functional group(s) Alkanes CH3CH3 ethane C – C and C–H Alkenes CH2 = CH2 ethene C=C Chemical tests/Observations Add liquid bromine in ultraviolet light (or sunlight): White fumes of HBr liberated; decolourisation of bromine occurs slowly (a) Add Br2 in CCl4 at room temperature: Decolourisation of bromine occurs immediately CH2 = CH2 + Br2 → CH2BrCH2Br (b) Add acidified
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In this quote‚ Chief Bromden says‚ “I been silent so long it’s going to roar out of me like floodwaters and you think the guy telling this is ranting and raving my God; you think this is too horrible to have really happened‚ this is too awful to be the truth! But‚ please. It’s still hard for me to have a clear mind thinking on it. But it’s the truth even if it didn’t happen.”(Act 1 32) Chief Bromden‚ a long-term patient in Nurse Ratcheds psychiatric ward‚ narrates the events of the novel. The novel
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Q. 1. During the electrolysis of molten lead bromide‚ which of the following takes place : A : Bromine is released at the cathode. B: Lead is deposited at the anode. C : Bromine ions gain electrons. D: Lead is deposited at the cathode. Ans : - D. Q. 2. Here is an electrode reaction : Cu → Cu2+ + 2e-. [i.e. Cu- 2e- →Cu2+]. At which electrode(anode or cathode) would such a reaction take place. Is this an example of oxidation or reduction. Ans : - At anode. Oxidation. Q. 3. A solution contains
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In the late 1400’s and early 1500’s the word Christians had another meaning to the natives of Central America‚ and that meaning is “Demons”. With the constant atrociousitys being done to the natives of Central America on behalf of European Christians during that time it soon became apparent to the natives that the Christians values that were being forced upon them were apparently the beliefs of demons and evil doing‚ since no good person or religion would do such evil things to people who welcomed
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how chemistry affects us today. Our entire universe is made up of matter which is constantly changing forms and evolving into other forms of energy. Most people have chosen to write their essay about how chemistry has played an important role in everyday life. The simple fact is that chemistry plays an important role in every person’s daily activities from the moment we’re born. Chemistry is the branch of science that deals with the structure of organic and inorganic matter( any substance or organism
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