certain types of doze alarm-type alarm clocks.It can turn into liquid at room tempurature.It boils at 656.11 F. Mercury is the only metal that is a liquid at standard temperature and pressure. The only other liquid element under standard conditions is bromine‚although the metals rubidium‚ cesium‚ and gallium melt just warmer than room temperature. Mercury has a very high surface tension‚ so it forms rounded beads of liquid.
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SKPP 1313 Fundamentals of Petroleum Engineering Quiz 1 (20 marks) Name: _____________________________________________________ Answer all questions 1) Petroleum engineer can be divided into several groups. Name one of them and briefly explain his main duty. [3 marks] __________________________________________________________________ __________________________________________________________________ __________________________________________________________________ __________________________________________________________________
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Conformational Analysis - Cyclohexane 6) Stereochemistry – regioselective‚ stereoselective‚ stereospecific 5 Examples of Topics covered for Revision Quiz 1 (not limited to the topics below) 1) 2) 3) 4) 5) 6) 7) 8) Acids and Bases Conformations of Alkanes and Cycloalkanes Alcohols and Alkyl halides Elimination Reactions of Alkenes SN1 and SN2 Aromaticity and Electrophilic Aromatic Substitution Aldehydes and Ketones Enols and Enolates 6 Project Presentation Search the literature for work on
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methyl bromide and hydrochloroflourocarbons (HCFCs) are the major contributors to the deterioration of the ozone layer. These chemicals have industrial halocarbons that break up into chlorine and bromine in the upper stratosphere when they react with the sun’s rays. Chlorine eats up the ozone layer while bromine acts as a catalyst and speeds up the process. Often found in Antarctica‚ there are frozen chemical clouds in the upper stratosphere called polar stratospheric clouds. These polar stratospheric
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PAHANG TRIAL 2009 EXAMINATION CHEMISTRY PAPER 2 MARKING SCHEMES SECTION A - Structural Questions: Question 1. (a) (i) The presence of isotopes 1M (ii) Let the abundance of 63X be a %. The % abundance of 65X. = ( 100 – a ) 1M Relative atomic mass = ( 62.93 x a) + ( 64.93 x ( 100 -a) ) 1M
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Synthesis of an Alkyl Halide: A Nucleophilic Substitution Reaction Unknown Letter: B 23 April 2013 Academic Integrity Statement: “Experimental data may be collected with other students in organic chemistry labs. However I understand that sharing information required for a lab report (including but not limited to word processing or spreadsheet files‚ calculations‚ graphs‚ conclusions and additional problems at the end of the lab report) with other students is a violation of the University
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SYLLABUS FOR ENTRANCE TEST 2012 UNIVERSITY OF HEALTH SCIENCES LAHORE‚ PAKISTAN STRUCTURE OF ENTRANCE TEST PAPER 2012 Sr.# Subject No. of Questions 1. PHYSICS 44 2. CHEMISTRY 58 3. ENGLISH 30 4. BIOLOGY 88 TOTAL 220 CONTENTS PHYSICS Syllabus TOS Self Test Questions CHEMISTRY Syllabus TOS Self Test Questions ENGLISH Syllabus Self Test Questions BIOLOGY Syllabus TOS Self Test Questions PAGE# 1-5 6 7-9 10-21 22 23-28 29-34 35-36 37-44 45 46-51 PHYSICS
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because 2+1 integration was overlapping). The multiplicities of all signal clusters of H1 spectrum helped in determining the structure of compound. The signal at 4.9 indicates that the alkane group must be attached with electronegative compound that shifted alkane group by “2”‚ and the signal at 2 indicate the alkane group must be attached with carbonyl group. Thus‚ all the information collected from NMR suggested that the product of fisher esterification was (1‚3-dimthylbutyl) acetate. A number
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2013 Lab-partner: Viktoria R. Beltran RELATIVE RATES OF ELECTROPHILIC AROMATIC SUBSTITUTION I. Objective(s) In this Experiment‚ the relative reactivities of different substituted benzenes towards bromination will be determined‚ where bromine is dissolved in acetic acid. Materials and apparatus Test solutions: 0.2 M solutions in ethyl acetate: Benzene‚ chlorobenzene‚ phenol‚ nitrophenol‚ aniline and acetanilide. Measuring pipettes (5 mL) micro test tubes 0.05 M Br2
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theoretical yield)/ theoretical x 100% = percent error Abs. (58.5 – 60)/ 60 x 100 = 2.5% Scheme of the Reaction (Exp.12a/12b): Analysis of Results: In this experiment‚ the compound diphenylacetylene was made by using potassium hydroxide to take the bromine off of the 1‚ 2-dibromo-1.2-diphenylethane. Pyridinium bromide perbromide was used rather than Br2 due to it being a volatile and highly corrosive substance. Calculate the theoretical yield which was 0.107g of diphenylacetylene. Calculate the percent
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