Technology can be immensely useful especially in school‚ certain careers‚ people who choose to help others and unfortunately also to those who chose to use it badly to ruin a person’s life or the community or world as a whole‚ but question is‚ does technology really help us students particularly? From my life time experience I don’t think technology really helps us‚ technology just makes us lazy‚ and lazy enough to plagiarize or miss use it. I can relate to plagiarism because I’ve done it not only
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Assignment Questions: Session Nine: VANS - Skating on Air What were some of the key characteristics of Vans’ earliest customers in the 1960’s and 1970’s? The 1960’s‚ customers appreciated the fact that the shoes were the best durable and affordable causal deck shoe in the marketplace. Unlike‚ other manufacturers in the industry Vans sold directly to customers out of their store in Anaheim California. These customers were fun‚ outgoing‚ stylish individuals that wanted to stand out from the crowd
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C5-C30 n-alkanes were used to made retention indices (RI) and 2‚4‚6-trimethylpyridine (TMP‚ purity 99 %‚ I.S.) was used to internal standard which were purchased from Sigma-Aldrich Trading Co.‚ Ltd (Shanghai‚ China). Mono Trap (MT) (Diameter 2.9 mm ×Length 5 mm‚ Hole Diameter 1 mm) (ODS‚ silica gel and activated carbon) was used for headspace MMSE was obtained from GL Science (Shinjuku‚ Tokyo‚ Japan). Extraction of volatile compounds Fish sauce samples were extracted volatile compounds by Monolithic
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1. List all Functional Groups 2. What is an alkane? List its properties. 3. Write the name and formula of simple alkanes 4. Consider this compound (CH3)2CHCH2C(CH3)3. Name this. a. redraw it clearing all brackets and parentheses. b. Find the longest chain. Check from all directions. If it is not horizontal‚ rewrite the compound that so that longest chain IS horizontal. c. Number the carbons of the longest chain backwards and forwards.
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Muraleedharan Aromatic electrophilic substitution (Ar-SE) Reactions The special reactivity of aromatic systems towards electrophiles arises mainly from two factors: the presence of π electron density above and below the plane of the ring - making it nucleophilic‚ and the drive to regain the aromatic character by opting for substitution as opposed to a simple addition reaction. Preference towards addition reactions in the case of alkenes and substitution in the case of aromatic compounds becomes
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RELATIVE RATES OF ELECTROPHILIC AROMATIC SUBSTITUTION Juris Marie G. Garcia Institute of Chemistry‚ University of the Philippines‚ Diliman‚ Quezon City Date Performed: February 27‚ 2015 Date Submitted: March 13‚ 2015 Answers to Questions: 1.) Arrangement of Reactivity: (fastest to slowest) - Phenol‚ Nitrophenol‚ Acetanilide‚ Benzene‚ Chlorobenzene‚ Aniline - A reaction has occurred if there’s a change in color. The nature of the substituent‚ whether electron-donating to the ring or electron-withdrawing
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Electrophilic Aromatic Substitution Objective The objective of this experiment was to illustrate electrophilic aromatic substitution by synthesizing p-nitroanilide (as well as ortho) from acetanilide by nitration. The para form was separated from the ortho form based on solubility properties using recrystallization techniques. Synthetic equations: Physical Properties & Hazards of Reagents/Products: (all taken from Sigma-Aldrich website) Acetanilide MM = 135.16 g/mol Melting point =
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Lab 6: Electrophilic Aromatic Substitution(1) Nitration of Methyl Benzoate(2) Synthesis of 1‚4-Di-t-butyl-2‚5-dimethoxybenzene byFriedel-Crafts Alkylation of 1‚4-DimethoxybenzenePurpose1)To carry out the nitration of methyl benzoate‚ and then identify the major product formed (position at which nitro-group substitution takes place) by thin-layer chromatography (TLC)‚ the percent yield and the melting point range. 2)To synthesize 1‚4-Di-t-butyl-2‚5-dimethoxybenzene by Friedel-Crafts Alkylation of
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The Synthesis of Alkenes: The Dehydration of Cyclohexanol Adam Ohnmacht CHEM 0330 Scott Caplan 10/30/12 Abstract: In Organic Chemistry‚ many different methods are used to synthesize organic compounds from various components. In this lab‚ cyclohexanol was dehydrated to cyclohexene through an elimination reaction. In order to separate the cyclohexene product from the cyclohexanol starting component‚ previously learned lab techniques such as extractions and simple distillation were used.
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Recently‚ the Malaysian government has launched a campaign of 10 000 steps a day to create awareness to the public on healthy lifestyle. At the school level‚ all students are required to sit for the SEGAK test to determine the fitness level of students based on a few physical tests. Among the elements of the test is taking the pulse rate of each student. Based on the SEGAK test conducted in your school‚ get the pulse rate of 50 students before and after the step up board activity. Complete the
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