represent the electron level diagram. a . S b. c. d. none of the above ( ) Choose 2) Which of the following is fa lse about MO theory? a) no. of atomic orbital formed will be the sam e as the no. of molecular orbital form b) MO theory not only can be used to explain magnetic properties but as well as el ectrical conductivity c) MO diagram for carbon dioxide is the
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brevity the information I present here will be based on the assumption that life that life is organic‚ carbon based‚ is dependent on some sort of energy source‚ either tidal‚ geothermal or solar and requires some sort of solvent‚ either water‚ liquid ammonia or liquid hydrocarbons. Division Issues of habitability‚ that is‚ "the measure of an astronomical body’s potential for developing and sustaining life" (http://en.wikipedia.org/wiki/Planetary_habitability)‚ can be placed into three groups‚ planetary
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ion‚ specifically hemoglobin. It can be see the iron group which is located at the center of the molecule‚ and in this example is responsible for the attachment of oxygen. 2. The [Be(H2O)4]2+ complex ion will have to hybridize the 1s2 and 2s2 orbitals. 3. Lewis bases‚ they are donating electrons to the complex metal cation 4. 5. Data Sheet Names:______________________________ 6. Section 1 (Introduction to Isomers) 7
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are small and are negatively charged (-) with a mass of almost 0 amu.. 4. Protons & neutrons are in an atom’s nucleus (nucleons). Which has the greatest number of nucleons? Sn-119 Sb-122 Te-128 I-127 5. Electrons are found in “clouds” (orbitals) around an atom’s nucleus. Where is most of the mass of an atom found? Where is most of the size (volume) of an atom found? 6. The mass number is equal to an atom’s number of protons and neutrons added together. What is the mass number
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Manufacture of Ammonia and its salts 1. State uses of ammonia in daily life. -To make explosive chemicals such as TNT -In the rubber industry‚ ammonia is used to prevent the cogalation of latef 2. State physical properties of ammonia. -Ammonia‚(NH₃) is a colourless and pinyentgas -It is less dense than air -It is highly soluble in water. NH₃ + H₂O NH₄OH 3.The diagram below show ]s a flow chart to prepare nitric acid and fertiliser Z from ammonia. Ammonia Ammonia Fertiliser
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CH 222 ANALYTICAL CHEMISTRY I SYLLABUS COURSE OUTLINE: a. Introduction (1.5 hours) Classification of types of analysis‚ role and importance of analytical chemistry in various aspects of life. b. Steps in a typical quantitative analysis (10 hours) Emphasis on sampling protocol‚ sample preparation‚ wet chemistry methods‚ statistical evaluation of data. c. Review of concepts of stoichiometry (2 hours) Mole concept‚ concentrations‚ dilution and aliquots d. Review of concepts of equilibria
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Revision checklist for IGCSE Chemistry 0620 A guide for Students Revision checklist for IGCSE Chemistry 0620 A guide for students How to use this guide The guide describes what you need to know about your IGSCE Chemistry examination. It will help you to plan your revision programme for the theory examinations and will explain what the examiners are looking for in the answers you write. It can also be used to help you to revise by using tick boxes in Section 3‚ ‘What you need to know’‚ to check
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Thermochemistry IB questions 1. Ammonium nitrate‚ NH4NO3‚ dissolves readily in water according to the equation: NH4NO3(s) NH4+(aq) + NO3-(aq) H = 28kJ mol-1 Which of the following contribute(s) to the occurrence of this process? I. The system moves to lower enthalpy. II. The system becomes more disordered. a. I only b. II only c. Both I and II d. Neither I nor II 2. Which substance has the largest lattice energy? a. NaF b. KCl c. MgO d. CaS 3. A certain reaction is spontaneous
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TUTORIAL 1: STK1503 BENZENE AND AROMATIC 1. Draw structures corresponding to the names given. a. m-fluoronitrobenzene b. p o-chlorophenol c. o-chlorophenol d. 3‚5-dimethylbenzoic acid e. 1-phenyl-3-methylpentane 2. Provide correct IUPAC names for each of the following compounds. a. NO2 CH3 b. c. CH3 d. NH2 H2N CH3 e. Ph C H3 C C CH2CH2CH3 Ph 3. For each molecule below‚ predict whether the molecule would be expected to show aromatic character or not. Explain your answer
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associated with the specific orientation of bonding atoms. A careful analysis of electron distributions in orbitals will usually result in correct molecular geometry determinations. In addition‚ the simple writing of Lewis diagrams can also provide important clues for the determination of molecular geometry. Molecular geometry‚ the bond lengths and angles‚ are determined experimentally. Lewis structures can give us an approximate measure of molecular bonding. There is a simple procedure that allows
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