OLD COINS TURN TO GOLD DESIGN: Problem or Research Question: How does zinc effects the color change in a copper penny? Hypothesis: If copper and zinc comes together‚ then it will form brass‚ which gives gold color to copper penny. Variables: There were no variables at this experiment PROCEDURES: Materials: Zinc (SN) filling‚ 3M NaOH solution‚ Copper penny‚ tongs‚ Hot plate‚ 100 ml beaker‚ 250 ml beaker‚ Bunsen burner‚ Water‚ Spoon. Procedure: First‚ we turned on the hot plate.
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model organism” (Simpson‚2010). Fermentation is the metabolic procedure in which an organism alters a carbohydrate‚ such as sugar or starch‚ into an acid or alcohol. For instance ‚ yeast performs fermentation to achieve energy by altering sugar into alcohol. Bacteria execute fermentation‚ altering carbohydrates into lactic acid (Helmenstine‚ 2013). Fermentation can be used in the food and drink industry as well‚ examples of this is bread. In the process of fermentation with bread‚ yeast produces carbon
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of Chemical Engineering CHME 426 –Chemical Engineering Laboratory III Title Page (Full Report) Title of the Experiment: Reaction through three CSTR in series Submitted by: Group (4) Section: Female 1. Name: Amina Ali ID: 200550284 2. Name: Duaa Tabarak ID: 200553858 3. Name: Mariam Rustom ID: 200552242 Date of experiment: 31st March‚ 2010 Date of submission: 11th April‚ 2010 Grades: Report presentation………………………………………… /15 Abstract and Objective(s)……………………………………/10 Introduction
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Investigation Investigate the amount of heat evolved when magnesium reacts with dilute acids. Planning What I am going to do I am going to find out how much heat is given out when magnesium reacts with a variety of dilute acids. In order to make comparisons between the acids‚ I shall use my results to work out how much heat would be given out if 1 mole of magnesium reacted with an excess of each acid. The acids I shall use are hydrochloric acid‚ sulphuric acid‚ nitric acid and ethanoic acid
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nutrients that collectively aid in photosynthesis‚ growth‚ formation of proteins‚ and overall quality of the plants. Not having these essential nutrients may result in various diseases‚ leaf discoloration‚ and very limited growth. In our experiment we decided to test how exposure to sunlight (or lack thereof)‚ and the amount of nutrients available to plants affect seed germination as well as overall plant growth. We did this by exposing some plants to light while others not‚ and by applying the synthetic fertilizer
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EXPERIMENT I Photoreduction of Benzophenone Introduction The study of chemical reactions‚ isomerizations and physical behavior that may occur under the influence of visible and/or ultraviolet light is called Photochemistry. The fundamental principles for understanding photochemical transformations are that light must be absorbed by a compound in order for a photochemical reaction to take place‚ and that for each photon of light absorbed by a chemical system only one molecule is activated for
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Adol Condensation Introduction: This reaction is carried out by adding benzaldehyde and acetone into a flask. The product created is a 1‚5-diphenyl-1‚4-pentdiene-3-one‚ which includes two double bonds‚ and two benzyl ring functional groups. This is a dehydration reaction that occurs twice in order to form the diene. After obtaining the product‚ via vacuum filtration‚ it will be recrystallized and then analyzed for purity by determining both products’ melting point. The two products will be
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References: http://webs.mn.catholic.edu.au/physics/emery/measurement.htm#Measurement http://www.digipac.ca/chemical/sigfigs/experimental_errors.htm http://www.tsb.gc.ca/eng/rapports-reports/rail/2011/r11v0057/r11v0057.pdf
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with quadrants that contain the culture‚ a hemacytometer‚ was used to carry out this experiment. After the data was collected from using the hemacytometer‚ the results of the difference between the two cultures was to be determined through a t-test. As the test was conducted‚ the study shows that the difference between lacking an antibiotic and containing one is not different. An antibiotic in culture-A and culture-B does not affect the number of yielded yeast cells. Introduction. -- It is undetermined
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There are three ways to test the growth kinetic rate of microorganism on shake flask‚ which are by optical density (OD)‚ glucose analysis and cell dry weight (CDW). Then‚ from these test the result then used to plot the growth curve graph which next use to compared and analyze the growth curve of microorganism. 2.0 Introduction Shake flask fermentation is one of the fermentation method which are widely used for screening of high producing strains. The shake flask fermentation is the simplest way
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