Chapter 1 MULTIPLE CHOICE QUESTIONS Topic: Atomic Orbitals 1. A) B) C) D) E) In quantum mechanics a node (nodal surface or plane) is: a place where Ψ is negative. a place where Ψ is positive. a place where Ψ = 0. a place where Ψ2 is large. a place where Ψ2 is negative. Ans: C Topic: Atomic Orbitals‚ Molecular Orbitals 2. When the 1s orbitals of two hydrogen atoms combine to form a hydrogen molecule‚ how many molecular orbitals are formed? A) 1 B) 2 C) 3 D) 4 E) 5 Ans:
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sample of 2-acetoxybenzoic acid [1]‚ commonly known as aspirin‚ through the reaction of salicylic acid with acetic anhydride under acidic conditions provided by sulphuric acid. Once the reaction was completed the samples’ yield and melting point were determined for comparison to industrial perimeters. The equation below outlines the overall reaction between salicylic acid and acetic anhydride. Note that acetyl salicylate is a synonym of aspirin and acetic acid is a by-product. Aspirin is one
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Experiment 1: "A cis to trans conversion" Saturday‚ June 25‚ 2005 4:19 PM Notes on Theory • Alkenes o They are hydrocarbons with a C=C double bond • Double bonds are stronger and more reactive than single bonds o Hydrocarbons with double bonds used to be known as "olefins"‚ because they had an oily appearance • "Oleum" means oil • "Ficare" means make • Isomers o Geometric isomers have the same molecular formula‚ but a different geometric arrangement • They also have different physical properties
Free PH Acid dissociation constant Buffer solution
Analysis of Hydrocarbons Leoncito‚ Alyssa Lynn‚ Libatique‚ Keith Martin P.‚ Ligot‚ Nestlhyn B.*‚ Lim‚ Jamie Therese T. Department of Psychology‚ University of Santo Tomas‚ Manila‚ Philippines Abstract Four organic samples: hexane‚ cyclohexene‚ napthalene and toulene were given to serve as reference standards to characterize and distinguish four unknown given samples. Nitration‚ bromine and basic oxidation testswere conducted to classify the different samples from being an aliphatic‚ or aromatic
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Journal of Polymers and the Environment‚ Vol. 10‚ Nos. 1/2‚ April 2002 ( 2002) Sustainable Bio-Composites from Renewable Resources: Opportunities and Challenges in the Green Materials World A. K. Mohanty‚1‚2 M. Misra‚1 and L. T. Drzal 1 Sustainability‚ industrial ecology‚ eco-efficiency‚ and green chemistry are guiding the development of the next generation of materials‚ products‚ and processes. Biodegradable plastics and bio-based polymer products based on annually renewable agricultural
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The purpose of Module 11A was to test for the presence or absence of a particular set of functional groups through the use of wet chemical tests. In this manner‚ Unknown A which was a colorless solution‚ was first tested with 2‚4-DNP which after mixing for a few seconds formed a bright yellow precipitate. Although this confirms the presence of either a ketone or aldehyde group‚ one simple chemical test does not completely specify the presence or absence of other functional groups. Therefore‚ a second
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Mary Eunice Agapito‚ Denmarc R. Aranas*‚ Limuel Joseph V. Bacani‚ and Steven Arthur Baluyot Analysis of Hydrocarbons Department of Biology‚ University of Santo Tomas‚ Manila‚ Philippines Abstract In this experiment we performed parallel chemical test method to identify an unknown. The reflux setup was used to prevent evaporation in mixing the reactants in an inert solvent with its boiling point. Another highlight of this experiment is the liquid-liquid extraction wherein a solution containing
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The Middle East is probably the most important influence on the global petrochemical industry today and will remain so for many years to come. However‚ prospects of a war in Iraq are raising concerns‚ and logistical and feedstock challenges could hem in the region’s growth. Saudi Basic Industries Corp.‚ or SABIC‚ the majority of which is owned by the Saudi Arabian government‚ has grown to 40.6 million metric tons of petrochemical production and sales of $9 billion in 2002 to become the 11th largest
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eXPRESS Polymer Letters Vol.3‚ No.6 (2009) 366–375 Available online at www.expresspolymlett.com DOI: 10.3144/expresspolymlett.2009.46 Starch-based completely biodegradable polymer materials D. R. Lu‚ C. M. Xiao*‚ S. J. Xu College of Material Science and Engineering of Huaqiao University‚ Quanzhou‚ 362021‚ P. R. China Received 21 February 2009; accepted in revised form 30 March 2009 Abstract. Starch is a natural polymer which possesses many unique properties and some shortcoming simultaneously
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CHE656 Computer Applications for Chemical Engineering Practice Process Simulation with ASPEN PLUS Exercise Problems Version 2012 Prepared by Dr. Hong-ming Ku King Mongkut’s University of Technology Thonburi Chemical Engineering Department Chemical Engineering Practice School © May 2004-2012 – Use with Permission of the Author Only 1 Section 1 Elementary Modules‚ Mass Balances‚ and Degree of Freedom Analysis 2 1. Mass Balances and Constraints with Elementary Modules
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