A. WORK-OUT PROBLEMS: Write formulas for the following: calcium nitrate phosphorous pentafluoride aluminum carbonate strontium hydroxide methane potassium oxide lithium chloride barium sulfate phosphate ion dinitrogen tetroxide Give the complete electron configurations of: S‚ O2-‚ and Mn. For the following molecules/ions‚ give the Lewis structure‚ molecular geometry‚ and electron pair geometry: NO2- SF4 Write Lewis structures to represent all resonance forms of CO32-
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QUEZON CITY 1101‚ PHILIPPINES DATE SUBMITTED: 3 JANUARY 2012 DATE PERFORMED: 8 DECEMBER 2011 ------------------------------------------------- ABSTRACT Alkyl halides are molecules which have a carbon atom attached to a halogen atom (e.g.‚ chlorine‚ iodine‚ or bromine.) Alkyl halides are very important since they are used in many of the products used today. They can be synthesized by means of adding alcohols to hydrogen halides (such as HCl‚ HI‚ or HBr) resulting in nucleophilic substitution
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for rag pickers. Develop a technology‚ which is eco-friendly. DISADVANTAGES OF PLASTIC ROADS 1. Cleaning process Toxics present in the co-mingled plastic waste would d start leaching. 2. During the road laying process But the presence of chlorine will definitely release noxious HCL gas. 3.After the road laying The components of the road‚ once it has been laid‚ are not inert. It is opined that the first rain will trigger leaching. As the plastics will merely form a sticky layer
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dsUnzh; fo|ky; laxBu नई दिल्ली अध्ययन / सहायता सामग्री िसवीीं कक्षा ववज्ञान क ललए े dsUnzh; fo|ky; laxBu lEHkkxh; dk;kZy;] vkbZ- vkbZ- Vh- dSEil] iobZ] eqEcbZ& 400076 1 Acknowledgements CHIEF PATRON : SHRI AVINASH DIKSHIT COMMISSIONER‚ Kendriya Vidyalaya Sangathan(HQ) New Delhi SHRI PRL GUPTA‚ ASSISTANT COMMISSIONER‚ Kendriya Vidyalaya Sangathan Mumbai Region SHRI SK VERMA EDUCATION OFFICER‚ Kendriya Vidyalaya Sangathan Mumbai Region SMT. AP BHALLA EDUCATION OFFICER‚ Kendriya Vidyalaya
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Diluting MgO with HCl 2. Diltuing NaCl with HCl Classify the following properties of sodium metal as physical or chemical: • Silver metallic color: Physical • Turns gray in air: Physical • Melts at 98oC: Chemical • Reacts explosively with chlorine gas: Chemical Classify the following changes as physical or chemical: • Water freezes at 0oC: Chemical • Baking soda when combined with vinegar produces bubbles: Chemical • Mothballs gradually disappear at room temperature: Physical
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Dear Sir‚ I am writing regarding an article published in your magazine last week entitiled ...... I strongly disagree with the writer for a number of reasons. Firstly‚ as Socrates wrote‚ work makes the man. However‚ in Plato’s Dialectics he argued that‚ on the contrary‚ one must have sufficient rest to Secondly‚ I believe that we need to ’recharge our batteries’ in order to have the energy to work efficiently. For example‚ as an IB student I have so much work to do with CAS‚ ToK‚ Extended Essays
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electrons does group two have‚ group two has 2 valence electrons. When group two elements become ions what is their charge‚ their charge is +2. What are the group 17 elements called‚ they are called the Halogens. List the group 17 elements‚ Fluorine‚ Chlorine‚ Bromine‚ Iodine‚ and Astatine. How many valence
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experiment is to determine the reactivity of hydrogen atoms on a carbon chain using free radical chlorination. In this experiment 1-chlorobutane will be chlorinated with the combination of sulfuryl chloride and ABCN as an initiator to produce the chlorine radicals. The combination of 1-chlorobutane and sulfur chloride will produce four dichlorobutane isomers. The isomers produced and their reactivity will be analyzed by the amounts of isomers produced in the product and by gas chromatography. Procedure:
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B) Site of synthesis: 1- In pancreas: Synthesis of taurine in the mammalian pancreas occurs through the cysteine sulfinic acid pathway. First‚ in this pathway is oxidation of cysteine sulfahydryl group to sulfonic acid‚ this oxidation is catalyzed by the enzyme cysteine dioxygenase. In turn‚ cysteine sulfonic acid is decarboxylated to hypotaurine by sulfonoalanine decarboxylase. It is not well known whether hypotaurine is then enzymatically or spontaneously oxidized to taurine. 2- in CNS: Biosynthesis
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Physical and chemical ProPerties Physical and Chemical Properties Lab RepoRt assistant This document is not meant to be a substitute for a formal laboratory report. The Lab Report Assistant is simply a summary of the experiment’s questions‚ diagrams if needed‚ and data tables that should be addressed in a formal lab report. The intent is to facilitate students’ writing of lab reports by providing this information in an editable file which can be sent to an instructor. Substance Name Mg Cu Zn
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