The Thickness of Aluminum Foil Lab In the study of Chemistry‚ we encounter very large and very small numbers. For example‚ the size of a molecule or thin layer of molecules is very‚ very small and difficult to measure directly. In order to “measure” such numbers‚ we often use one measured quantity and another known property to calculate the unknown value. In this experiment‚ we will use this approach to calculate the thickness of various types of aluminum foil‚ a quantity whose direct experimental
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6. Steps 3-5 were repeated and the results were also tabulated as L and N. 7. A graph of L vs. N was plotted in order to fine the gradient (G). 8. Using the formula G=mρA ‚ the value of m as the mass of 1 paperclip was found where the density of water (ρ) is 1.0gcm-3. N(number of paperclips) | L (cm) | Average | | L1 | L2 | | 0 | 7.6 | 7.6 | 7.6 | 1 | 8.3 | 8.2 | 8.3 | 2 | 8.3 | 8.7 | 8.5 | 3 | 9.3 | 9.3 | 9.3 | 4 | 9.8 | 9.9 | 9.9 | 5 | 10.3 | 10.3 | 10.3 | 6 | 10
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understand the photosynthetic process to help enhance the efficiency and quality of life on Earth. By fully understanding the function of photosynthesis‚ some environmental adjustments can then be made to refine the photosynthetic process. In this lab specifically (Lab No. 7)‚ we isolated specific color wavelengths and recorded the rate of photosynthesis in comparison to the unaltered rate of photosynthesis
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Melissa Carrithers 9-17-14 Period: 6 Determination of the Empirical Formula of Silver Oxide Purpose: To find the percent composition and empirical formula of silver oxide can then be calculated‚ based on combining the ratios of silver and oxygen in the reaction. Hypothesis: Silver oxide decomposes to silver metal and oxygen when strongly heated. Heating Silver oxide causes the oxygen to be driven off‚ leaving only the silver metal behind. The total mass of the products of a chemical reaction must
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Chemistry 121 Colligative Properties Lab Demonstration of Selected Calculations from Choice I Determination of Kf for Naphthalene To determine the Kf for naphthalene‚ we need to find the difference in the freezing point of pure naphthalene and the solution of 1‚4-dichlorobenzene in naphthalene. Let’s say that we did this experiment‚ used 1.00 g 1‚4-dichlorobenzene in 10.00 g naphthalene‚ and found that the freezing temperature of pure naphthalene was 78.2°C‚ while that of the solution was 75
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ASTR 101 Size of the Solar System Name _______ Section __ Overview · Become familiar with the scale of the planets vs. their distances. · Get an overview of the solar system. · 50 points are possible Introduction It is easy to flip to the index of an astronomy textbook to discover that‚ say‚ the Sun lies 150 million kilometers away from Earth. It is far more difficult (if not impossible)‚ however‚ to picture this distance in our mind. In this exercise
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Tom Tribal Economic Development Midterm March 1‚ 2010 1. Define what is tribal “self-determination”? Discuss how “self-determination” has influenced economic growth in the modern tribal economy. Tribal self-determination was a way to better life for American Indians. Three main factors were put into place to help American Indians with the self-determination act. The first one is tribal self rule. A second factor would have to be cultural survival. Finally a third factor
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Oil Precious Ahmed ID# 6463614 Section 07‚ Friday afternoon Lab experiment performed on: Friday‚ January 19‚ 2013 Lab report submitted on: Friday‚ January 24‚ 2013 Introduction Before the synthetic aspirin of today‚ salicylic acid‚ which is the important ingredient found in aspirin‚ was extracted naturally from methyl salicylate found in Wintergreen oil‚ which could be found in certain plants. The purpose of this lab experiment is to prepare salicylic acid from the natural starting material
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Lab Report: Halogen Reactions Purpose: This experiment will allow for exploration into some of the properties of Group 17 elements (halogens) and their compounds. More specifically‚ the solubility properties of these halogens will be used to predict their reactions. The relative electronegativities of the halogens will be determined. Halides‚such as Cl-‚ Br-‚ and I- will be used to make these determinations. Because this lab is qualitative rather than quantitative‚ there are no calculation
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Unit 2 Home Labs Goals: • Read Safety • Perform Changes: Physical or Chemical Lab • Perform Special Physical Properties of Matter Lab • Perform Paper Chromatography Lab Turn-in: 1) Changes: Physical or Chemical Lab - Completed Procedure / Observations‚ questions‚ and a written description of most important concept that you learned in the discussion section. 2) Special Physical Properties of Matter Lab – Completed Procedure / Observations‚ questions‚ and
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