calculate the percentage of Mn and acetyl acetone and the empirical formula THEORY Manganese is a first row transition metal that has a tremendous variety of oxidation states that appear in its compounds. The oxidation numbers range from Mn (III) in compounds like Mn(NO)3CO to Mn (VII) in KMnO4. Compounds of manganese range in oxidation number between theses two extremes. This experiment involves the preparation of a Mn (III) complex of actylacetone (also named 2‚4-pentanedione) which is a useful
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N10/4/CHEMI/SP2/ENG/TZ0/XX 88106105 CHEMISTRY STANDARD LEVEL PAPER 2 Thursday 11 November 2010 (afternoon) Candidate session number 0 1 hour 15 minutes 0 INSTRUCTIONS TO CANDIDATES • • • • Write your session number in the boxes above. Do not open this examination paper until instructed to do so. Section A: answer all of Section A in the spaces provided. Section B: answer one question from Section B. Write your answers on answer sheets. Write your session number
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guess paper 1. Express the rate of following reaction in terms of disappearance of hydrogen in the reaction. 3H2(g) + N2(g) 2NH3(g) 2. What is peptisation? 3. Write Reimer Tiemann reaction. 4. Why is CO stronger ligand that Cl-. 5. Write structure of 2-(2-Bromophenyl)butane. 6. Complete the reaction C6H6+R COCl 7. Why pentahalides more covalent than trihalides? 8. What is difference between nucleoside and nucleotide? 9. Explain the following- (a) Gattermann Koch
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The young of today are said to be growing up and maturing way too fast‚ as compared to previous generations. These children no longer act their age‚ instead they have been moulded by the world in such a way that they seem to be much older than they actually are. However‚ it is of no wonder that the little ones are growing up faster in this age‚ especially with the increasing emphasis on good grades‚ all-roundedness as well as the increasing amount of family issues. Having said that‚ children these
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Cam-Ha Nguyen Abstract: Using hypochlorous acid to convert secondary alcohol called cyclododecanol to the corresponding ketone which is cyclododecanone by oxidation. Procedures: Gilbert‚ John and Stephen F. Martin. Experiment Organic Chemistry: A Miniscale & Microscale Approach. Belmont‚ CA: Thomson Brooks/Cole‚ 2010. 537-547. Print. Data/ Results: Synthesis of cyclododecanone: Cyclododecanol | 0.2691 (g) | Sodium hypochloride | 2.300 (ml); positive for 1 time test (purple/black)
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experiment of making borneol from camphor (FIGURE-3) is performed in two different methods‚ Sodium Borohydride Reduction and Meerwein-Ponndorf-Verley Reduction‚ to compare the relative product ratio of borneol to isoborneol. The concept of reduction and also oxidation‚ the opposite procedure of reduction‚ deals mostly with electron transfer between atoms. It will not be elaborated here‚ but the reduction procedure involved in this experiment is basically adding hydrogens and losing the carbon-oxygen double
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Adolescence and Adulthood PSY/202 April 29‚ 2012 Adolescence and Adulthood The psychosocial development stage during adolescence is the search for identity. Psychosocial development encompasses the way peoples understanding for themselves‚ one another and the world around them changes during the course of development. I think that around the age of 15 years old I was beginning to go through this stage. I got my first part time job and no longer felt that I needed my parents to give me
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increased the amount of carbon dioxide being released into our environment. The team of researchers also discovered that magnified pyrite (commonly known as fool’s gold) oxidation created acidity that allowed carbon dioxide into our oceans and altered the Earth’s carbon cycle. Over a time period of 10‚000 years‚ glacial oxidation could have altered the concentration of carbon dioxide in the Earth’s atmosphere by nearly
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Preparation of food takes a lot of time. Even if the dish is only composed of fruits. A lot of dishes have vegetables in them. These can also be useful especially when preparing lots of different food at the same time. If you look at cooking websites they will suggest to use lemon water. In our experiment we will attempt to find out which is better at preserving the sliced‚ chopped‚ and or diced food. Since our experiments are limited by time and costs‚ we will stick to the simplest of the available
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That feeling of wanting and need is prominent in all of us. It could be the love from your family or friends‚ or just being around that "in crowd". Certain things make us feel that knowledge of being accepted. A movie will sometimes make us search for that one true love or influence us to get those new trendy jeans. We want to look a certain way and have that style our society idolizes; we crave it and strive for it. Advertising bombards us with images that coax us into a conformist viewing style
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