Abstract: The main objective of this Lab‚ is to experiment with stoichiometric measurements‚ since it is one of the most important subjects in chemistry. In addition‚ stoichiometric measurement is widely used in chemistry‚ because it indicates the proportion of mass in which various substances react. By examining one specific example of stoichiometric determination‚ which is: “Stoichiometry and limiting reacting”‚ we found out the different mass proportions in which substance react. In this case
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Research Task: Metals By Megan Forbes 1. Gold Figure 1 Evidence of gold mines: Ancient Egyptian map showing roads to Nubian gold mines‚ dated 1400-1200 BC (Located in the Egyptian Museum in Turin‚ Italy) Figure 1 Evidence of gold mines: Ancient Egyptian map showing roads to Nubian gold mines‚ dated 1400-1200 BC (Located in the Egyptian Museum in Turin‚ Italy) Figure 2 Ancient Egyptian hieroglyphs depicting gold Figure 2 Ancient Egyptian hieroglyphs depicting gold i) Gold was no
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Effects of Temperature‚ pH‚ Enzyme Concentration‚ and Substrate Concentration on Enzymatic Activity INTRODUCTION Enzymes‚ proteins that act as catalysts‚ are the most important type of protein[1]. Catalysts speed up chemical reactions and can go without being used up or changed [3] Without enzymes‚ the biochemical reactions that take place will react too slowly to keep up with the metabolic needs and the life functions of organisms. Catecholase is a reaction between oxygen and catechol
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Title: “The Effect of Substrate Concentration‚ Enzyme Concentration‚ pH and Temperature on Enzyme Activity” Abstract: In the following experiments we will measure precise amounts of potato extract as well as Phenylthiourea‚ combined with or without deionized water and in some instances change the temperature and observe and record the reaction. We will also investigate the different levels of prepared pH on varying samples of the potato extract and the Phenylthiourea and record the results.
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The effect of enzyme concentration‚ substrate concentration‚ pH‚ and temperature on the enzyme catalase. Introduction: Enzymes are biological catalysts; proteins and RNA. They are required for most biological reactions and they are highly specific. Each enzyme has an active site. The active site is the spot on the enzyme where a substrate fits in. Substrates binds with enzymes through the active site. Enzymes‚ being highly specific‚ only fit with one certain substrate. Enzymes and substrates
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Introduction Some surgical procedures require the use of metal pins to hold bones in place while they heal. The type of pins‚ the number of pins‚ and the length of time you will have the pins in place vary depending on the type of surgery you had. In some cases‚ the pins will stick out of your skin until they are removed. These pins require special care. They need to stay clean to prevent infection around the pin or in your bone. What are the risks? Generally‚ the use of these surgical pins is safe
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The Women of Full Metal Jacket In Stanley Kubrick’s "Full Metal Jacket"‚ it is difficult to determine the role that women play simply because of the glaring lack of female characters. In total‚ only three women actually appear in the movie‚ and two of those are prostitutes; the third isn’t revealed as a woman until the final 10 minutes of the film‚ and none of them are given names. In fact‚ until the sniper’s gender is revealed‚ women only play a role as objects for the soldiers’ amusement. In all
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Biochemical Pathways of Heavy Metals Poisoning BIO101 (Principles of Biology) 6 July 2012 Abstract The biochemical pathways of heavy metal poisoning are routes by which the metals pass in the body as they impair and destroy normal cellular and organ activity. The most common types of heavy metal poisoning are caused by lead‚ arsenic‚ cadmium and mercury. They are also the most extensively studied at the moment. Lead poisoning occurs mainly by the inhibitory effect that the metal imposes on enzymes and
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beaker containing an unknown salt‚ x. The salt is crystalline‚ deliquescent and colorless. The student is asked to perform test and observation on the salt to determine the cation and anion present. HYPOTHESIS: Perhaps by using the flame test or reacting salt x with NaOH‚ or NH4OH the cation could be distinguished by observing the color changes or solubility while reacting salt x with H2SO4 or a mixture of copper turnings and concentrated sulphuric acid the anion of the salt could be found. AIM:
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Case 7-3 Quality Metal Service Center 1. Is the capital investment proposal described in Exhibit 3 and attractive one for Quality Metal Service Center? The project evaluation seems to be beneficial to the company: A. Payback period: 4.5 years less than the company’s criterion of 10 years B. Internal rate of return: 21.8% c. Net present value (at 15% cost of capital): $286‚000 The proposal seems to be an attractive one due to the fact that there seems to be a need in the district for this
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