Lab #2 Determination of Density Britney Williams Chemistry 121 Dr. Yu 1/29/13 Purpose: To determine the densities of aluminum and zinc cylinders Density is the relationship between the mass of an object and its volume. Sometimes density can be easy to sense. If two objects have exactly the same shape and size‚ the denser one may feel heavier. If their densities are close together‚ it can be hard to tell the difference. It gets really tough if you are dealing with materials that have very different
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changes in temperature. The changes in temperature were to be used to find the amount of heat released or absorbed. EXPERIMENTAL Reference """""""""""your website with your information""""""" RESULTS Calculation Calculation for determination of q: q = ms∆T Hess’s Law-type calculation ΔH = ΔHproducts – ΔHreactants J = g x [ J / ( g x ° C ) ] x ° C Calculation for Heat Change q=60g(160g*4.4c) =(60g*4.18J)/4.4j =1104.56 Joules CLASS TABLE part I
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Hardness Tests and Charpy Impact Test Objectives: 1) To compare the hardness between mild steel‚ carbon steel through Vickers Hardness Test. 2) To compare the hardness between High Quality Carbon Steel and ASSAB steel through Rockwell Hardness Test. 3) To compare the hardness between carbon steel and mild steel through Brinell Hardness Test. 4) To study the differences between mild steel and carbon steel upon Charpy Impact Test. Introduction: Hardness is a measure of the resistance
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...............................(1) Measurement of Relative Water Content (RWC%);Relative Turgidity (RT %): Relative water content was estimated according to a modification of the method of Weatherly (1950); Weatherly and Barr (1962); Slatyer (1957);Fletcher et al. (1988)on the final day of the experiment and was calculated by the formula given byKramer (1983).Detached leaf samples were weight immediately and floated on distilled water in a darkened refrigerator (5˚C). Saturation of the leaves was
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Cintya G. Alarcon Donna Biology 121 section WDF Lab Report # 1 1.On the graph paper in Figure 3‚ plot a graph of your experimental results. Choose an appropriate number scale for the Y-axis and label it Number of Infections. Choose an appropriate number scale for the X-axis label it Number of Exchanges. 2. In a few sentences‚ summarize the results of the experiment. In your summary‚ include data from your summary chart and graph. Statements of results should include only facts—no interpretation
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Since I was young‚ I have striven to achieve my goals; I call it a "determination to succeed." Without a "determination to succeed‚" giving up in life‚ when a situation seems impossible to overcome‚ becomes second nature. The methods one uses to overcome the challenges faced in life affects how one acquires success. For example‚ my ancestors did not overcome their struggle for equality without self-determination to better their lives. Thus‚ their lives have been an inspiration for me. The motivation
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Determination of the Waters of Crystallisation/ Water of Hydration‚ In Hydrated copper (II) Sulphate Introduction In nature there are some salts that will have water in their crystalline structure. These salts are commonly known as hydrated salts. Hydrated Copper (II) sulphate is one of these‚ as suggested by the use of the word hydrated in its name. Its molecular structure is shown below. The water that is chemically combined into their structure is called the water of crystallisation.
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Diffusion Lab Research Question: How does the amount of water in a beaker affect the rate at which food coloring diffuses to the bottom of the beaker? Independent Variable: Height of water in beaker (Inches) Dependent Variable: Rate of diffusion (seconds) Controlled Variables: * Size of beaker * Temperature of water (23°C) * Type/color of food coloring * Person Timing * Environmental conditions Materials: * Beaker(well over 4 in tall) * Food coloring * Tap water(23°C)
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TITLE Hardness Tests And Charpy Impact Test OBJECTIVE 1. To compare the hardness of the carbon steel‚ mild steel and ASSAB steel using three different hardness tests‚ which are Vickers Hardness Test‚ Rockwell Hardness Test and Brinell Hardness Test. 2. To study the hardness of mild steel‚ carbon steel and ASSAB which is an important in engineering to design structures or components that related in mechanical properties 3. To determine the resistance of carbon steel and mild steel
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This paper is a full determination for certain chemicals and their boiling points. It lists some already but given the atomic numbers of any material this project includes a conversion and calculation chart to find the freezing point of most any material. GOOD LUCK! Abstract: In this lab we determined the freezing point‚ and Kf‚ of pure 2‚4‚dichloralbenzne as well as a 2‚4‚dichloralbenzne/biphenyl solution. We used this information to determine the molar mass of an unknown (#24) by the 3rd step
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