Chemistry Project on STUDY OF ADULTERANTS IN FOOD CHEMISTRY PROJECT WORK INVESTIGATORY PROJECT STUDY OF ADULTERANTS IN FOOD-STUFFS Name: Taher Shabbir Hussain Class: XII-B School: Indian Public School Year: 2009-2010 iC BS E.c om Chemistry Project on STUDY OF ADULTERANTS IN FOOD iC BS 2|P a ge E.c om Chemistry Project on STUDY OF ADULTERANTS IN FOOD Certified to be the bonafide work done by Mr. / Miss in the _ TAHER SHABBIR HUSSAIN of class XII
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Combustion of Acetylene (ethyne) Rx: Back Why I don’t do acetlyene explosions in our lab.... Combustion of alkanes A quick review.... • Combustion reactions of alkanes consist only of C and H (hydrocarbon) • require O2(g) as a reactant • produce CO2(g) and H2O(g) and a large amount of energy!! Oxygen can be the limiting reagent which can lead to Incomplete combustion. For complete combustion of a hydrocarbon‚ oxygen must be in excess. If there isn’t sufficient oxygen‚ incomplete combustion occurs
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Chapter 4 - Chemical Bonding Outline • 4.2 Naming Compounds and Writing Formulas • 4.1 Types of Chemical Bonds • 4.4 Electronegativity‚ Unequal Sharing‚ and Polar Bonds • 4.5 Vibrating Bonds and the Greenhouse Effect • 4.3 Lewis Structures • 4.6 Resonance • 4.7 Formal Charge: Choosing among Lewis Structures • 4.8 Exceptions to the Octet Rule • 4.9 The Lengths and Strengths of Covalent Bonds © 2014 W. W. Norton Co.‚ Inc. 1 Chemical Bonds All chemical bonds consist of _______ that
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Isotopes and average atomic mass Isotope: element variations with different atomic mass but same atomic number Isotopic Abundance: the relative amount in which each isotope of an element Calculating: given 2 isotopes of an element [B: 10.01u] [B: 11.01u] 1) Given average atomic mass: 10.81u If given percentages‚ you can find average atomic mass by adding each portion 2) Set variables for unknown values Let x represent % abundance for 10/5 B Let 1-x represent % abundance for 11/5 B Calculate:
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CHE 242 Tutorial 3: Problems & Answers Week 4: Feb 2- 6‚ 2009 1. Consider a gas that occupies 1.00 dm3 at a pressure of 2.00 bar. If the gas is compressed isothermally at constant external pressure‚ Pext‚ so that the final volume is 0.500 dm3‚ what is the smallest value Pext can have? Calculate the work involved using this value of Pext. Solution For compression to occur‚ the value of Pext must be at least as large as the final pressure of the gas. P1 = 2.00 bar‚ V1 = 1.00 dm3‚ V2 = 0.500
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priority substituent = 1; lowest priority substituent = 4). Place the number in the blank below the substituent. (a) (b) 3. Determine the relationship between each of the following pairs of structures (enantiomers‚ diastereomers‚ constitutional isomers‚ or identical). (a) (b) (c) (d) 3. Which of the following structures is different from the other three? Explain. 4. (a) Place asterisks at all of the asymmetric carbon
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molecular formula C7H14. On ozonolysis and subsequent treatment with zinc and acetic acid‚ C yields only: O O The structure of C is: I II IV A) B) C) D) E) III V I II III IV V Ans: E Topic: Structure Elucidation 4. Compound X has the molecular formula C6H10. X decolorizes bromine in carbon tetrachloride. X also shows IR absorption at about 3300 cm-1. When treated with excess hydrogen and a nickel catalyst‚ X yields 2-methylpentane. The most likely structure
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Turning on the battery‚ observe the results at each electrode. Next‚ test for hydrogen and oxygen gas produced at each end of the tube. Electrolysis of water it splits it up into its constituent elements. Oxygen at te anode‚ hydrogen at the cathode 4. Burning magnesium Place magnesium ribbon in a clean crucible (on a clay triangle above a Bunsen burner). Heat until the magnesium begins to burn. MgO is a white solid. 5. 6. Data and Observations: Complete a data table that includes a prediction
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EST1: Task 310.2.1-05 Opportunities for Company Q to lead in the area of social responsibility Company Q’s attitude towards social responsibility appears to be nonexistent‚ possibly through ignorance or disconcert. Either way the lack of social responsibility affects their business and community’s perception of their business. It appears that the company management has never developed and ethics program that clearly defines the corporate culture including provisions for social responsibility. Profits
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Marco Amaral – PBWRSK Module Hand-in Assignment 05 Week 05 Task 1 The PI Risk Matrix is displayed in Table 1. Table 1 – PI Risk Matrix Prob Impact 0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0.1 0.09 0.08 0.07 0.06 0.05 0.04 0.03 0.02 0.01 0.2 0.18 0.16 0.14 0.12 0.10 0.08 0.06 0.04 0.02 0.3 0.27 0.24 0.21 0.18 0.15 0.12 0.09 0.06 0.03 0.4 0.36 0.32 0.28 0.24 0.20 0.16 0.12 0.08 0.04 0.5 0.45 0.40 0.35 0.30 0.25 0.20 0.15 0.10 0.05 0.6 0.54 0.48 0.42 0.36 0.30 0.24 0.18 0.12 0.06 0.7 0.63 0.56 0.49 0
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