to a carbon with 2 hydrogen neighbors as well as to a carbon having no hydrogen attachments. This is indeed the case with molecule 4-octyne. Furthermore‚ the shift downfield would be expected‚ because the 2 protons there are close to a pi electron cloud of an sp-hybridized atom‚ and a proton close to an sp-hybridized atom would be expected to show this slight shift downfield.iv The two remaining signals found near 1.0 ppm and 1.5 ppm were indicative of CH2-CH3 sp3-hybridized signals‚ further matching
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1. Which of the following statements about heat is false? A) If heat flows into a system‚ the extra energy of the system appears in the form of internal energy. B) A hot object possesses more heat than a cold object. C) If the system and surroundings are in thermal equilibrium‚ there is no heat flow between them. D) A process in which heat flows out of a system is said to be exothermic. E) Heat is a form of energy flow. B is false. If you compare a cup of water at 25oC and a bath tub of
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Objectives for Lecture 9 Know the difference in resolution and magnification between light and electron microscopes. Understand the process of cell fractionation based on centrifugation and know what the purpose of cell fractionation is. Know what the differences in cell structure are between prokaryotic cells and eukaryotic cells Know that most eukaryotic cells are between 10-100 m in diameter‚ whereas most prokaryotic cells are about 1 m in diameter. Know the following terms‚ plasma
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Experiment C. Aim: To protect one of two carbonyl groups (C1) in order to allow the other to react twice with a Grignard followed by removal of the protecting group by acid hydrolysis to give final product (C2). Method: Ethyl acetoacetate (30.03g)‚ ethylene glycol (15.01g) and toluene-p-sulphonic acid (0.13g) were added to a 250 cm3 round bottomed flask‚ containing a stirrer bar and toluene (100 cm3)‚ fitted with a condenser and dean-stark head. Solution was heated strongly under reflux using
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Science‚ Medicine & Technology – Lecture 2 14th September‚ 2012 Global Warming – Paul Waithe * Differences between climate change & global warming: Global warming is the overall increase in the earth’s temperature. Climate change may be in either direction. For instance; more hurricanes‚ more wind etc. Comprehensive way at looking at weather patterns. * Climate change over the past century is directly linked to global warming. * Global warming could result in the world
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Electric Shock Anyone What Is This Module About? Nowadays‚ electrical appliances are commonly seen in every household. In your home‚ you probably have a television set‚ a radio‚ a karaoke player‚ a VCD player and other electrical appliances. But have you ever wondered how these appliances work? All of these need electricity to work. In this module‚ you will be introduced to the basic concepts of electricity. You will also learn about its uses. After going through the module‚ you should be able
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NURSYAHIRA ABD HAMID ASSIGNMENT 1 Explain the concept and purpose of the geochemical‚ gravity‚ electromagnetic and magnetic surveys. 1. Concept and purpose of geochemistry Petroleum geochemistry has played an important role in many areas of exploration and production for fossil fuels. Many of the more recent developments can be seen to have developed in parallel with developments in analytical chemistry such as gas chromatography and gas chromatography−mass spectrometry. For the past two decades
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I have learned from this project is that everyone is original and vary from each other. This was a fun project‚ I got to display who I am and present the things that really mean the most to me‚ and why they are important. Each time I presented to a new person‚ I tried to enthrall them with my own originality. People read my symbols in the way I expected them too because‚ there were very little questions‚ some did have an egregious look on their face when I said I like to dance. If I could do this
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the parts of an atom? Where are the subatomic particles found? a) Protons‚ neutrons‚ and electrons b) Protons and neutrons are located in the center of an atom in the nucleus and the electrons are located around the nucleus. 2) How does the Atomic Mass # differ from the Atomic #? The atomic mass number is the sum of the number of protons and neutrons in the nucleus of an element and the atomic number is the number of protons that it has. 3) What is an isotope? Give an example (show how
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deductive) CH2 Matter and mass Element (substance that cannot be broken down into further substances) Atom (smallest unit of an element) – subatomic particles (neutrons‚ protons‚ electrons) Compound (2 or more) Atomic number - # of protons Atomic mass = # of neutrons and protons Ion – total number of electrons doesn’t equal # of protons (anion gained electrons‚ cation lost electrons) Electron shells‚ orbitals‚ valency‚ rule of 8 Bonds = ionic‚ covalent (polar‚ nonpolar)‚ hydrogen‚ Van der walls
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