Lab Report 3: Combustion of Magnesium and Specific Heat of a Metal C4C Jeffrey Silvin Fall 2017 Major Kittle Chem 100 T1 Introduction The purpose of this lab was to determine an experimental value for the heat of formation of MgO with Hess’s Law and then use the result to find percent error. To do so‚ approximately 50 mL of 1.0 M HCl was added to a calorimeter. Initial temperature was measured and then 0.25 g of Mg was added. After the reaction is completed the maximum temperature was recorded.
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Mrs. Feeney Biology 9 October 16‚ 2012 Identifying Organic Compounds Objective: To use indicators to test for the presence of organic compounds in certain substances. Theory: Major types of organic compounds in some common foods are Lipids‚ Carbohydrates‚ and Proteins. An indicator is a chemical compound that changes color and structure when exposed to certain conditions and is therefore useful for chemical tests. The purpose of using distilled water as one of the substances in the test
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JOCELYN S. GEOLLEGUE MBA 101B – Financial Accounting Case No. 1-1 RIBBONS AN’BOWS‚ INC. Page No. 1of 2 I. VIEWPOINT Carmen Diaz – Owner II. STATEMENT OF THE PROBLEM 1. On Ribbons an’ Bows‚ Inc. finances: a. How would the three-month operations be reported (through June 30)? b. Was the company profitable (ignoring Income Taxes)? c. Why did its Cash-in Bank declined (during the three-month period)
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Analysis……………………………………………………………………………………………………4 Issues 1. Ribbons an’ Bows’ Finances a. How would one report on Ribbons an’ Bows Inc.’s three-month operations through June 30? b. Was Ribbons an’ Bows‚ Inc. profitable? (Ignoring income taxes) c. Why did Ribbons an’ Bows‚ Inc.’s cash in the bank decline during the three-month operating period? 2. How would one report the financial condition of Ribbons an’ Bows‚ Inc. on June 30‚ 2006? 3. Should Carmen’s first
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Purpose: To determine the percent magnesium by mass in magnesium oxide and to observe if the percentage composition is constant by comparing class results. Hypothesis/Prediction: The percent composition by mass of magnesium in magnesium oxide will not change significantly with each group that conducted the experiment. The composition of each substance should stay the same and any differences must be due to some error. Materials:Magnesium stripCrucibleCrucible coverClay triangleIron ringRetort standTongsBalanceBunsen
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carbonyl compounds is useful in reactions because nitriles are versatile functional groups1. Not only are they versatile functional groups but they serve as precursors in several transformations. The cyano-group is found in many bioactive molecules and plays a role in hydrogen bonding to certain biological receptors.4 Nitriles are carboxylic acid derivatives because they can easily be converted to carboxylic acid under either basic or acidic conditions. Piperonal is an aromatic compound that is present
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Hess Law Lab DESIGN Aspect 1: Problem: What is the molar enthalpy of formation of magnesium oxide? Variables: Manipulated: None Responding: None Controlled: Isolation of calorimeter‚ concentrations of substances involved. Aspect 2: Background Information: Assumptions: Specific heat capacity of water‚ we assume that the acid has the same qualities as water including heat capacity‚ and we assume the enthalpy of formation for magnesium oxide from the data booklet for theoretical
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Magnesium Mg(Z=12) in Group 2 Alkaline Earth Metals The structure of the element: Giant lattice metallic structure of immobile positive metal ions surrounded by a ’sea’ of freely moving mobile electrons (so-called delocalised electrons). Physical properties: A moderately hard silvery-white solid; mpt 649oC; bpt 1090oC; good conductor of heat/electricity. Group‚ electron configuration (and oxidation states): Gp2 Alkaline Earth Metal; e.c. 2‚8‚2 or 1s2 2s2 2p6 3s2; (+2 only) e.g. MgCl2
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Chemistry December 14‚ 2010 Conductivity of Ionic solutions Introduction This lab report is about the conductivity of ionic solutions. In class we have been discussing wether all ionic solutions conduct equally well. If an solvent solution conducts electricity‚ then it must contain ions. So measuring the conductance of solutions can tell you whether the solutes in the solution are dissociated into ions. (Conductivity) Any type of solution‚ even ionic solutions‚ provide resistance to the flow of
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A Tale of 3 Pumpkins … Pumpkin Three: Ribbon by Heather Well we have come to the end of our tale of the three pumpkins. First‚ we met the lovely and vintage Book Page Pumpkin. Then our journey brought us to the glamorous and classy Faux Nailhead Pumpkin and last we meet the sweet and cheery Ribbon Pumpkin. Isn’t she just a little sweetheart?! Believe it or not she proved to be the most difficult pumpkin to make‚ though you’d never know it by her demure personality and the simplicity of her
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