original state and the percent of the hydrate recovered was calculated by using the mass of the rehydrated sample by the mass of the original hydrate and then multiplied by 100%. Data Presentation & Analysis Table 1: The data was collected from the lab experiment. Sample calculations are shown. Mass of beaker with sample 30.765g Mass of empty beaker 30.263g Mass of sample .502g Mass of beaker with sample after 1st heat 30.661g Mass of beaker with sample after 2nd heat 30.657g Heating mass
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The lesson is divided into 3 labs that can be completed in any order. After labs have been completed‚ facilitate a class discussion where students summarize and compare findings and relate how their findings support (or refute) Newton’s Laws of Motion LAB 1: How fast can it go? Put one car at the top of the ramp and let it roll down. Use a stopwatch to record the time the car rolled. Use this information to calculate the acceleration of the car. Measure the distance the car rolled using the
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20.9104‚ df = 10). The results were expected to show statistically insignificant differences between ethanol‚ methanol‚ and propanol. On the other hand‚ urea was expected to diffuse significantly faster than ethylene glycol (Hunter 1976). The hypothesis regarding hemolysis time was that the lipid/water partition coefficient would be directly correlated with speed of hemolysis‚ while molar volume would be indirectly correlated (Gardner and Godrick 2011). Therefore‚ increased molar volume would
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A. Goal and Purpose: Session 1: In this lab‚ we will achieve a simple Friedel-Crafts alkylation of anthracene. The choice of anthracene as an aromatic substrate stems from two considerations. First‚ there is a question of regioselectivity. Second‚ anthracene and its derivatives are highly visible under UV light. Session 2: In this lab‚ we will complete a partial conversion of 9-acetylanthracene using m-chloroperoxybenzoic acid (mCPBA). We will also determine by NMR‚ the regiochemistry of the
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catalase is represented in the following balanced equation:2H2O2(l) 2H2O(l) + O2(g). Dead cells may still be studied to learn more about enzyme function because as seen in the liver despite the fact that the cells are dead‚ the enzymes remain intact and active for several weeks‚ as long as the tissue is kept
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we had two adjoining containers with one representing a lighted environment and the other one representing a dark environment. The dependent variable in this experiment was the behavior of the mealworms in response to the variable of light. The hypothesis was that the mealworms would have a tendency to move towards the dark environment away from the light source
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When Chemicals React! Mr. Bell’s honors level chemistry class conducted an experiment during their lab demonstrations‚ this consisted of elements such as phosphorus and calcium chloride in their experiment. This along with another hydrogen based sunstance produced‚ what looked like a pinkish-looking substance inside of their flasks that were at their lab stations. Sophmore Kelly Caudel said‚ “ I actualley enjoy doing the experiments in this class‚ because it gives us a chance to get away from
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will have an advantage and will be common. (Understanding Evolution) Therefore‚ the question to be tested will be if you count the number of stomata of the same species of leaf at different stages of life will the number of stomata be different? My hypothesis is if we count the number of leaf stomata at three different stages of life then the number of stomata will be less as the leaf gets older because the leaf is dying. (Understanding Evolution) Procedure Approximately three leaves of the where gathered
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Humans‚ performs gas exchange in order to transport gas‚ nutrients and waste throughout the body. Respiratory system and Circulatory are responsible to carry out the gas exchange. The Respiratory system is composed of nose‚ larynx‚ pharynx‚ trachea‚ bronchi‚ bronchioles‚ pleura‚ alveoli and diaphragm. The Circulatory system consists of the heart‚ blood vessels‚ arteries‚ arterioles‚ veins‚ venules‚ capillaries and blood. In this lab‚ we will only focus on the circulatory system. The heart is the
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the percent yield by dividing the expected yield‚ the amount of product that should be produced based on your stoichiometric calculations‚ by the actual yield‚ the amount of product that is experimentally obtained from a chemical reaction. In this lab‚ I have determined the reaction for mixing two reactants together; I measured out 0.005 moles of each reactant‚ lead (II) nitrate and potassium chromate. I dissolved‚ mixed‚ and made them react to make products; I compared the mass of the two reactants
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