9.3 – The Acidic Environment: Δ. Construct word and balanced formulae equations of all chemical reactions as they are encountered in this module: NOTE: In chemistry‚ [x] means “concentration of x” in moles per litre (mol/L). EG: [H3O+] means “concentration of H3O+ ions” in mol/L. BASIC reactions to remember: Acid reactions: acid + base salt + water acid + metal salt + hydrogen gas acid + carbonate carbon dioxide gas + salt + water Formation of hydronium: H+ + H2O H3O+ Reactions of
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UNIVERSITY OF CAMBRIDGE INTERNATIONAL EXAMINATIONS International General Certificate of Secondary Education CHEMISTRY Paper 1 Multiple Choice Additional Materials: Multiple Choice Answer Sheet Soft clean eraser Soft pencil (type B or HB is recommended) 0620/01 October/November 2008 45 Minutes *6400528663* READ THESE INSTRUCTIONS FIRST Write in soft pencil. Do not use staples‚ paper clips‚ highlighters‚ glue or correction fluid. Write your name‚ Centre number and candidate number on the
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What are the impacts of chemistry on society? In: Biology [Edit categories] Answer: the impacts chemistry have on a society is huge. every single material that we come in contact with‚ in our daily ife is composed of chemicals there are negative and positive effects of chemistry but the negative effect is mainly due to the inability of a man to think carefully first of all lets take the example of drugs. drugs are composed of chemicals ofcourse‚ but these drugs can be used for a good purpose
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Since the first computer was invented fifty years ago‚ our quality of life and happiness have increased. In fact‚ the appearance of Internet helps us find information much easier. Furthermore‚ the people that have a mental and physical disabilities would have more painful experiences without advanced medical techniques. Finally‚ the cell phone helps us to have better communication. Without computers‚ medical technology‚ and cell phones‚ modern life would not be as wonderful as now. The opposition may
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HKU820 BENJAMIN YEN AVIATION SPARE PARTS SUPPLY CHAIN MANAGEMENT OPTIMISATION AT CATHAY PACIFIC AIRWAYS LIMITED We have 2½ billion Hong Kong dollars worth of spare parts on our shelves. Managing these spare parts effectively is instrumental in ensuring the efficient operations of our airline. This presents a significant challenge to the engineering department. - Robert Taylor‚ manager of inventory operations‚ Cathay Pacific1 A profitable and financially sound commercial airline‚ Cathay
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There has been great controversy surrounding the existence of Marco Polo throughout history‚ as either fact or legend. There have been questions surrounding whether Marco Polo was the first European who traveled to China. This essay will discuss why Marco Polo’s journey is a fact. People ask why Marco Polo is considered as fiction. It was really difficult for him to prove if he was telling the truth. As to whether he was a real person and if he was actually the first European to travel to China
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CHEMISTRY OF NICOTINE Date Submitted: March 17‚ 2010 Introduction Tobacco has a long history and has had a significant impact since first introduced to Western society in the 16th century. There is evidence that Native Americans were using tobacco long before the 16th century. They smoked through a pipe for special religious and medical purposes but the worldwide spread of tobacco was initiated as a result of European discovery by Spanish‚ Portuguese and French explorers.(1‚2) Christopher
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ENG 101----proposal paper Rebecca Yuan Nov 28‚ 2012 Focus on Trash Island‚ Save Our Life Ignored by humans for decades of years‚ garbage floating on the ocean has become a trash island. The island consists of plastic bags‚ cans‚ tires and other plastic debris. The worse thing is that the trash island is still growing. The seawater in the center of Subtropical Airflow of pacific flows extremely slowly‚ with the addition of weather patterns‚ a large amount of garbage gather in this place. Year
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7th Grade 1st Quarter Prompt Writing Assessment How do life experiences form the core of an individual’s identity and character? According to my research‚ life experiences form the core of your identity and character because‚ for example‚ you can experience a grief such as an death of a loved one for example‚ in A Series of Unfortunate Events: A Bad Beginning‚ Written by Lemony Snicket‚ Violet‚ Klaus‚ and Sunny Baudelaire‚ experience a tragedy when their beloved parents died in a fire cause
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These days cell phones dominates our life. It makes things much more convenient by enabling us to communicate others anywhere we go in a small amount of time. One of the most used functions on a cell phone is not the phone‚ but the almost instant text messaging. With the unlimited possibilities that one can do with texting‚ it is as popular as ever. This wonderful shortcut does have its downsides. Studies show how the radiation emitted from these phone can damage brain cells. It can take up a large
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