Whitney Miller Chemistry 111-D01L 3/31/2013 Calorie Content of Food Purpose: The purpose of this lab was to measure the energy content of three different food items using the change in water temperatures from the heat of the food. Procedure: 1. With your digital scale determine the empty weight of your 100-mL beaker. 2. Half-fill the beaker with water (approximately 50 ml) and weigh it again. 3. The beaker and water weight minus the empty beaker weight is the net weight of water
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Carbohydrate Lab Report Introduction Qualitative identification of a substance is of significant importance in chemistry. Physical constants such as melting points have traditionally been used by organic chemistry for identification of unknown compounds. As for inorganic substances‚ the precipitation of a solid‚ results of a flame test‚ or the formation of a colored substance could all be keys to identifying a sample. Chromatography and spectra are amongst the newer techniques
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n this lab‚ everyone got a flask which we then drew a pumpkin face on. Then we mixed 42 mL sodium hydroxide solution‚ 10 g of glucose‚ 1 mL‚ 1 L of water and Methylene blue solution and leave it undisturbed. The blue solution turned clear and when we added the yellow food coloring it turned an orange color. The solution then turned dark blue once the solution was shaken vigorously. This reaction occurred because the oxygen oxidized the methylene blue.In the oxidized state the methylene blue shows
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that cigarettes release more then 20 carcinogens know to promote lung cancer into your body. (Hecht‚ 2010). When looking at the cilia exposed to cigarette smoke in this lab it is seen that they have been greatly slowed down when compared to the uncontaminated cilia‚ and parts of the cells are covered in tar from the tobacco. For this lab it was hypothesized that smoking will inhibit the ciliary action and lower the quality filter the greater affect will be exhibited by the effected cilia. The prediction
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Joshua Berkebile 8-26-10 1st period Density Lab The purpose of this lab was to find the mass‚ the length‚ the width and the height of 4 different cubes so we could calculate the volume and density of them. We also had to find the density of irregular shapes by dropping them into a graduated cylinder than subtracting the starting water volume by the ending water volume. Density is how much mass is in a certain volume of matter. Volume is the amount of room that an object
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hope to fully understand the Stroop effect‚ yet several issues remain open. The primary purpose of this study was to determine whether the Stroop phenomenon is equally strong in both brain hemispheres. Participants collected from our research methods lab were asked to complete an online experiment measuring the time of interference it took them to depict the color of the ink of the color-words. Furthermore‚ each color was assigned a number. For example‚ the ink color red was represented by the number
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Abstract: Two parts of this lab were performed involving photosynthesis and cellular respiration. The first part of the lab consisted of cutting out spinach leaf disks with a straw and then putting them into syringes containing an infiltration solution and sodium bicarbonate. Then the syringes were place under the presence of light and watched as certain disks floated. This part of the lab consisted of watching photosynthesis take place. Then for the second part of the lab we tested cellular respiration
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ratio of concentration represents the activity of the first metabolism enzyme of caffeine‚ CYP1A2 because it is responsible for the pathway of metabolism of caffeine. And the half-life of caffeine is about 4 to 5 hours (Thorn‚ 2011) Therefore‚ in this lab‚ we measure the saliva collected at different time and quantitatively analyzing
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2014 Authored by: Cody Appleby‚ Gregory Harmeling‚ and Joseph Pernici May 26th‚ 2014 Lab section: C014 Monday 11am-1:50pm TA: Eduardo Castillo Work station 8 1 Abstract This lab consisted of three different measurements; measuring length‚ flow rate‚ and resistance. The reason for this lab was to use statistical concepts learned in lecture to analyze data and to become more familiar with the lab equipment. Repeatability measurements were taken on a bolt to get the total length‚ and
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Titration Lab Introduction The purpose of this lab is reach and be able to calculate the equivalence point when we use titration to neutralize a base with acid. The process of the lab was determining the volume of a solution needed to react with a given mass or volume of a sample is called titration. The equivalence point is when the same number of moles of acid and moles of base has been added. Phenolphthalein is used as an indicator because it will have a color change when the equivalence point
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