As the elements went down Group I, the reactions became quicker and more reactive. This is because of the decreasing electronegativity. Each element in this group has one valence electron each, but a different number of shells. The increasing number of shells means that the valence electron surrounding the nucleus of the atom gets farther away as the elements go down the group. The electron experiences less of a pull towards the nucleus, so the atom can give the electron away a lot easily. This gives
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To Build a Fire Tamara Perez-Davis TUI University Module 1 – SLP ENG 102 Dr. Idara Essien-Wood Introduction "To Build a Fire" is told using the third-person point of view. The narrator is an outsider who tells the reader a story about the main character. A man that is so arrogant that he doesn’t even listen to his own instinct. London establishes this third-person point of view right from the beginning of the story, saying, “when the man turned aside from the main Yukon trail and climbed
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The purpose of this experiment was to perform a reduction of vanillin and used TLC to follow the reaction. Two TLC plates were prepared using a 2:3 EtOAc/Hexane. 2 mL of methanol was added to 200 mg of vanillin in a 5 mL conical value. 25 mg sodium borohydride was added in the vial, which resulted in bubbles forming. This is the indication that the reaction was occurring. The TLC plates were spotted in the interval of 15,30,0 and 120 seconds. The plates were placed under a UV lamp to identify
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Austin Neely August 31st, 2015 Experiment #01 The Determination of the Percent of Water in a Compound CHEM 1315‐ 025 Purpose of the Experiment & Techniques: The purpose of this experiment is to determine the percent of water in a hygroscopic compound. This will be done by boiling off the water only leaving the other element of the hygroscopic compound. When water molecules bond with the structure of solid substances this creates an ionic compound. By heating the compound, it is possible
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Enzymes are biological catalysts or assistants that consist of various types of proteins that work to drive the chemical reaction required for a specific action or nutrient. They can either launch a reaction or speed it up. Catalase is a common enzyme found in nearly all living organisms exposed to oxygen. It is a very important enzyme in protecting the cell from oxidative damage by reactive oxygen species (ROS). The catalase used in this experiment will come from five different sources: Spinacia
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1. Which of the variables in the second flux equation, J = 푃퐴(퐶퐼 − 퐶2), will be manipulated during the lab? In this lab, the concentration gradient across the membrane, (퐶퐼 − 퐶2), is the variable. Since we are using the same solute and membrane manipulated, P, the permeability coefficient of the solute across the membrane is constant. A, the membrane area, is also constant since we are using the same cell for all different concentrations. In this case, the concentration gradient across the membrane
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organic layer to recover product. The Grignard reaction yielded 1, 1-Diphenylethanol as the product. This was determined by the nature of how Grignard reagents add and
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Firstly, we set the membrane builder to obtain exactly 500 glucose carriers. After inserting the membrane into the holder between the two beakers, we then set the glucose concentration of the left beaker to 2.00 Mm and filled the beaker with this. We then filled the beaker on the right with deionized water and began the trial run. Upon setting the timer to 60 minutes, we observed that the glucose equilibrium was reached at exactly 43 minutes. We recorded the data involving the NaCl and Glucose of
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Conservation of mass means in a chemical or physical change, mass can not be created or destroyed,so the mass will always stay the same but only with a closed system. This all relates to the experiments we have done in class. In experiment 2.1 we found out if the mass changed when salt dissolves in water. We found that it did not. This experiment was a physical change because you didn’t create something new.The reactants we had in this experiment were the the water and salt. The products were
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