Materials: To complete all steps and smoothly complete the lab we first needed an almond‚ which what will be burned to find the energy and calories. Next we needed a paper clip to straighten out and put the almond on as a safe and efficient way to burn the almond. A scale and small aluminum-weighing dish were needed as well to weigh out the almond and paperclip. The lab also required a graduated cylinder‚ test tube‚ distilled water‚ thermometer‚ a Bunsen burner‚ a sparker‚ a calorimeter and safety
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in the 20% solution. 7. Average the molar masses you calculated in questions 3 and 6. 8. The formula for antifreeze is C2H6O2. Calculate its molarmass using the periodic table. 9. Calculate your percent error. Conclusion: This lab was a phenomenal success! The purpose of determining the freezing points of water‚ 10% antifreeze‚ and 20% antifreeze was not only accomplished‚ but also done so in a splendid manner. The net figures of our experiment were less than 5°C off from the
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Effects of Crossing Over in Sordaria fimicola Abstract Sexual reproduction in organisms is a cause for genetic variation. This can be seen through the process of meiosis in Sordaria fimicola because of the effects of crossing over and independent assortment that occur in meiosis I. Before performing this experiment we hypothesized that we would be able to see that crossing over did indeed occur in the S. fimicola. We tested our hypothesis by growing our own culture and observing it under a
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Directions: Make a copy of this document and change the file name to “your last name‚ VSEPR Lab.” Place the document in the Google folder with your name on it. Follow each instruction to build molecular models and answer the following questions. Make sure your notes‚ comments‚ and answers are in a different text color. When you have finished with the lab questions attach a 12 page conclusion that summarizes and explains the main points of the lab. 1. After you have washed your hands‚ obtain your "atom" supply from Dr
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Roy Levin Bio 11 Lab Dr.Izquierdo Analysis of Macromolecules in Tissue Homogenates of Bos taurusMaterials and Methods The homogenates provided were made by homogenizing tissues in a sucrose phosphate buffer in a 1:20 ratio. The protein concentration in bovine cells was measured by diluting the homogenate with a 1:5 ratio; 50 microliters of homogenate and 200 microliters of water. Then 5 known protein concentration samples which were 0.4‚ 0.8‚ 1.2‚ 1.6‚ 2.0 mg/ml of bovine serum were used to
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The Effect of Osmosis on a Potato Cell October 12th 2012 Osmosis Lab Purpose: The purpose of this lab is to investigate the effects of osmosis on a potato cell as it is immersed for a period of time in solutions of different water concentrations. Hypothesis: If the potato is immersed into the distilled water‚ then it will be the heaviest out of the three. This is because water is at the lower is moving toward the area of higher concentration‚ which in this case is the potato. This
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Coulomb’s Law Purpose: The purpose of this lab was to demonstrate that the force between two stationary charges is directly proportional to the product of the charges and inversely to the square of the distance between them. Coulomb’s law tells us that the force between two charges depends (1) linearly on the strength of each charge‚ and (2) inversely on the square of the distance between them. Mathematically we would write this as . Procedures Part1 Begin by removing the right side
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Lab Report Background Information: Magnesium is an alkaline earth metal that has the symbol Mg. Magnesium is a fairly strong‚ silvery-white‚ light-weight metal (one third lighter than aluminum). In a powder‚ it heats and ignites when exposed to moisture and burns with a white flame that is harmful to the eyes. It is difficult to ignite in bulk‚ but once ignited‚ it is difficult to extinguish. Magnesium Ribbon is a long strip of magnesium metal about 3 millimeters wide and 10 meters long with
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A The % Composition and Empirical Formula of a Hydrate: It Doesn’t Hold Water‚ Or Does It? 1. To determine the percent water in an unknown hydrate. 2. To calculate water(s) of crystallization for an unknown hydrate. 3. To determine the formula of an unknown hydrate. OBJECTIVES SKILLS Proper use of the following equipment: Dial-O-Gram balance (Laboratory Technique I)‚ electronic balance (Laboratory Technique II) and Bunsen burner (Laboratory Technique III). Dial-O-Gram balance‚ electronic
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Title: Acetone Lab Purpose: Use Table M and various indicators to determine the pH of acetone Equipment: Test tubes‚ test tube rack‚ acetone‚ various indicators‚ tweezers Procedure: 1. Fill each test tube with a few drops of acetone 2. Put 2 drops of an indicator into 1 of the test tubes 3. Record color change 4. Determine the pH range based on the color change using Table M and record data 5. Repeat for each indicator 6. To test litmus‚ dip red and blue litmus into acetone and determine
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