In this experiment the objective was to perform a Diels-Alder reaction using cyclopentadiene and maleic anhydride to synthesize the product‚ cis-Norbornene-5‚6-endo-dicarboxylic anhydride. The Diels-Alder reaction is one of the most important reactions in organic chemistry and was first investigated by Otto Diels and Kurt Alder in Germany. It is a [4+2] concerted cycloaddition reaction which involves a diene and a dienophile. The Diel-Alder reaction are mainly used for creating new carbon-carbon
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flask with 0.93 g of unknown to dissolve it. After reaching room temperature‚ the flask was placed into a bucket with ice and DI H2O. The unknown was collected by vacuum filtration‚ rinsed with ice water‚ and dried to constant mass at 0.72 g. 13C NMR (100.13 MHz‚ acetone-D6): σ 15.5 (s‚ Me)‚ 24.3 (s‚ Me)‚ 29.9 (s‚ Me)‚ 30.1 (s‚ Me)‚ 30.3 (s‚ Me)‚ 30.5 (s‚ Me)‚ 30.7 (s‚ Me)‚ 30.9 (s‚ Me)‚ 31.1 (s‚ Me)‚ 64.7 (s‚ Me)‚ 115.7 (s‚ C=C)‚ 122.5 (s‚ C=C)‚ 133.5 (s‚ C=C)‚ 156.4 (s‚ C=O)‚ 170.8 (s‚ C=O)‚ 210
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Question 2.1: (i) Calculate the number of electrons which will together weigh one gram. (ii) Calculate the mass and charge of one mole of electrons. * ------------------------------------------------- Answer (i) Mass of one electron = 9.10939 × 10–31 kg Number of electrons that weigh 9.10939 × 10–31 kg = 1 Number of electrons that will weigh 1 g = (1 × 10–3 kg) = 0.1098 × 10–3 + 31 = 0.1098 × 1028 = 1.098 × 1027 (ii) Mass of one electron = 9.10939 × 10–31 kg Mass of one mole of
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Week 2 Quiz Which of these is NOT one of the four general categories of cells that make up the human body? collagen cells muscle cell neuron connective tissue cell epithelial cells What is the term for the developmental process that leads to specialized cell types? homeostasis differentiation positive feedback genomics acclimatization If a person begins to sweat upon entering a hot room but continued sweating is able to keep the body temperature constant‚ which of these best
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the potential energy of the electron is used by enzymes to pump hydrogen atoms inside the membrane. This creates a proton gradient. The proton gradient is caused by a higher concentration of protons inside the membrane than outside. This proton gradient is then used to add a phosphate onto ADP‚ turning it into ATP. The net effect of this process is to store the energy of the proton gradient in
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Student ID: 21876729 Exam: 007525RR - METHODS‚ MAPPING‚ AND THE COMPOSITION When you have completed your exam and reviewed your answers‚ click Submit Exam. Answers will not be recorded until you hit Submit Exam. If you need to exit before completing the exam‚ click Cancel Exam. Questions 1 to 20: Select the best answer to each question. Note that a question and its answers may be split across a page break‚ so be sure that you have seen the entire question and all the answers before choosing an
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*PEPTIC ULCER DISEASE* Brief Introduction * Peptic Ulcer is a break in the gastric or duodenal mucosa that arises when the normal mucosal defensive factors are impaired or are overwhelmed by aggressive luminal factors such as acid and pepsin. * Ulcers extend through the musvularis mucosae and are usually over 5 mm in diameter. * In the United States‚ there are about 500‚000 new cases per year of peptic ulcer and 4 million ulcer recurrences; the lifetime prevalence of ulcers in the adult
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least common isotope of carbon‚ which is carbon-14‚ has 8 neutrons. All three isotopes of carbon have 6 protons‚ which makes them a carbon atom. Explain radioactive isotopes and one medical application that uses them. A radioactive isotope is an unstable isotope whose nucleus decays spontaneously‚ which in turn gives off energy and particles. This decay usually leads to a change in the number of protons found in the atom‚ in which the original atom is converted into an atom of a different element. An
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Experiments in physics lab report Department of Electrical Engineering Isabela State University Ilagan Campus‚ Calamagui 2nd‚ City of Ilagan‚ Isabela baccaljoemel@yahoo.com Submitted to: Engr. Rafael S. Ramos Physics12 Professor Submitted by: Joemel L. Baccal BSEE IIA Experiments in Physics Lab Report Joemel L. Baccal Department of Electrical Engineering Isabela State University - Ilagan Campus‚ Calamagui 2nd‚ City of Ilagan‚ Isabela baccaljoemel@yahoo.com Abstract In
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1) Demonstrate understanding of the terms atom and molecule. Atom= Smallest Unit of Matter Molecule= 2 or more atoms chemically bonded. 2) Describe paper chromatography. 3) Interpret simple chromatograms. A method used to separate a Solution‚ using a Paper and a beaker of water. The Substances in the Paper go up depending on their Mass. We can say that a Solution has the same substance as another solution because they form a line of the same height. 4) Describe methods of separation
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