How to Think Like a Computer Scientist: Learning with Python 3 Documentation Release 3rd Edition Peter Wentworth‚ Jeffrey Elkner‚ Allen B. Downey and Chris Meyers August 12‚ 2012 CONTENTS 1 2 3 The way of the program 1.1 The Python programming language 1.2 What is a program? . . . . . . . . . 1.3 What is debugging? . . . . . . . . 1.4 Syntax errors . . . . . . . . . . . . 1.5 Runtime errors . . . . . . . . . . . 1.6 Semantic errors . . . . . . . . . . . 1.7 Experimental debugging . . .
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Jet Sims Comp. II Ms. Choate February 3‚ 2012 Illiteracy Consequences Imagine being overseas in an unknown place where everything that is written is unrecognizable. An individual would possibly feel completely lost without any direction‚ no starting point‚ and no help. That is a daily way of life for the illiterate. They become lost because of their lack of education at a young age‚ or because their parents did not give them the opportunity. This education is paid for by the government and
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General Features of Oxidative Additions Oxidative addition reactions usually involve a coordinatively unsaturated 16-electron metal complex or five-coordinate 18-electron species‚ and take the general from: [pic] If the A and B ligands in the product are considered to be formally –1‚ then the metal center has increased its oxidation state by +2‚ and this is the origin of the name oxidative addition. Oxidative reaction can occur when a metal complex
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Electrophilic Aromatic Iodination of Vanillin Purpose: The purpose of this laboratory experiment is for an aromatic compound to undergo an electrophilic substitution reaction. To carry this out‚ our method combines sodium iodide and common bleach as the oxidizing agent in aqueous alcohol as the solvent. Balanced Chemical Equations: Physical Properties: Name of Chemical Chemical Structure Molar Mass (g/mol) BP/MP (ºC) Density (g/mL) Mass/Vol. Used Purpose 3-methoxy-4-hydroxybenzaldehye
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Synthesis and Isolation of Expectorant Guaifenesin By: Ben DuBose Dr. Cossey 3361L Abstract The purpose of this experiment was to isolate and synthesize Guaifenesin. Isolation was performed with the use of two Guai-Aid Tablets‚ each of which contained 400mg of pure Guaifenesin. Reflux‚ a technique used to heat a mixture without evaporating the solution‚ was used to synthesize Guaifenesin through a Williamson Ether Synthesis reaction with an SN2 mechanism. Introduction
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The carcinogenic nature of N-nitrosamines depends on the organs. For example‚ their targets for cancer in rodents include thyroid‚ pancreas‚ urinary bladder‚ trachea‚ lung‚ oral and nasal cavities‚ esophagus‚ kidney and liver. With respect to N-nitrosamides‚ skin‚ bone‚ peripheral nervous system‚ brain‚ small intestine and glandular stomach are targeted organs for cancers. Besides cancer‚ acute myelocytic leukemia and T and B cell lymphoma have also been triggered by N-nitrosamides. In table 8.1
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Illiteracy in Our Society It was one of the days I will never forget in my life time. My father was very sick in Abeokuta; my village‚ where we both live together with my mother. The people in our community have tried their hand on one thing or the other to help him‚ but we are left with the only option of taking him to the hospital in the city. My mother is to go first to the city and inform my uncle about this incident‚ so that my uncle could help take my father to the hospital. Has my
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Week 5 Essay # 3 Reading essay The Human Cost of an Illiterate Society by Jonathan Kozol rekindles the candle of the horrors of illiteracy within us‚ a candle that has been extinguished by our hectic lives. As he quotes James Madison’s statement‚ “A people who mean to be their own governors must arm themselves with the power knowledge gives”‚ these words make us think about ourselves and the society around us. A country is run by Government. That Government is chosen by people. And one third
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ETHERS Classification of Ethers: Symmetrical ethers – two groups attached to O are identical Ex. CH3CH2OCH2CH3 – diethyl ether Unsymmetrical ethers – two groups attached to O are not identical Ex. CH3CH2OCH3 – ethyl methyl ether Physical Properties of Ethers: Ethers have much lower boiling points compared to alcohols of comparable MWs. BPs of ethers increases with increasing MW. BPs of isomeric ethers increase with increasing alkyl chain length. BPs of ethers are about the
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Synthesis of DEET Abstract: For this experiment m-toluic acid was reacted with thionyl chloride resulting in a nucleophilic acyl substitution which could then be used to create DEET with excess diethyl amine (Figure 1). This was done by adding diethyl amine drop wise using a seperatory funnel which resulted in a gas formation which was controlled with a condenser attached to a gas vacuum. The resulting mixture was then washed to remove excess acids and bases and rotovapped. DEET was synthesized
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