Nick Boyea Billy Lee 3/9/11 Molar Mass by Freezing Point Depression Overview The purpose of this lab is to measure the freezing point depression of a solution of an unknown substance and BHT to determine the molar mass of the unknown substance. Summary of Lab Procedure If not already completed‚ crush a small amount of BHT and pack it into a capillary tube. Use a small rubber band to clamp the capillary tube to the thermometer‚ and fasten the thermometer to a ring stand. Fill a Thiele tube
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(1) Evaporation: Surface Area: Evaporation is surface phenomenon.Greater is surface area greater is evaporation and vice versa.For example‚ sometimes a saucer is used if tea is to be cooled‚ quickly.This is because evaporation from the larger surface area of saucer is more than that of the smaller surface area of the tea cup. Temperature: At high temperature‚ rate of evaporation is high because at high temperature
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Wilson’s Fourteen Points vs. Treaty of Versailles World War One was a tragedy that affect not one but many countries. It brought destruction‚ starvation‚ enemies‚ and death not only of soldiers but of normal civilians. There were two proposals created to end World War One: Wilson’s Fourteen Points and the Treaty of Versailles. They were both created to bring peace between the countries. However‚ they both had their positives and negative effects. Wilson’s Fourteen Points would have more independent
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computer packaged as a store controller that could control 128 IBM 3653/3663 Point of Sale Registers. This system was the first commercial use of client-server technology‚ peer to peer communications‚ and Local Area Network (LAN) simultaneous backup and remote initialization. Other computer-based manufacturers were Regitel‚ TRW‚ and Datachecker. 1973 also brought the introduction of the UPC barcode readers to the point of sale systems. By mid-1974‚ IBM 3653 Store System was installed in Pathmark
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2011 19th IEEE International Conference on Network Protocols Internet Exchange Points and Internet Routing Mohammad Zubair Ahmad and Ratan Guha Department of Electrical Engineering and Computer Science‚ University of Central Florida‚ Orlando‚ Florida Email: {zubair‚guha}@eecs.ucf.edu I. I NTRODUCTION The Internet is a network of Autonomous Systems (ASes) comprising of a complex and complicated ecosystem of networks used for a wide variety of applications. ASes exhibit varied functionality
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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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LECTERUR : EXPERIMENT 4 DETERMINING MOLECULE WEIGHT BY FREEZING POINT DEPRESSION METHOD STUDENT NAME : ID : LAB PARTNERS | | INTRODUCTION According to Anne‚ n.d‚ the freezing point of a liquid is decreased by adding to another compound to it. This is known as freezing point depression. The pure solvent will have higher freezing point than the solution. Colligative property of matter can explain more about freezing point depression. Whereas‚ colligative properties depends on the number
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Experiment 3 Colligative Properties Freezing-Point Depression and Molar Mass By‚ Andrew Klingsporn Joby J. Chem 212 Dr. Chandana Meegoda 2/11/2009 Purpose The purpose of this experiment is to determine the Molar Mass of an unknown substance using its freezing point depression. Introduction There are two types of mixtures; homogenous and heterogeneous. Homogenous mixtures have components that are uniformly mixed‚ while heterogeneous mixtures do not. A solution is a homogenous mixture
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Fourteen Points was a name given to the proposals of President Woodrow Wilson designed to establish the basis for a just and lasting peace following the victory of the Allies in World War 1. The 14 proposals were contained in Wilson’s address to a joint session of the US Congress on January 8‚ 1918. In summary‚ the 14 points were as follows : 1. abolition of secret diplomacy by open covenants 2. freedom of the seas in peace and war‚ except as the seas may be closed in whole or part by international
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Woodrow Wilson’s decision to give his Fourteens Points speech contributed to the end of World War I‚ was the basis for many peace treaties and paved the road for future nations and alliances. "Covenants of peace be quickly arrived at so that this war can end and future nations can begin." These are some of the words of Woodrow Wilson said when he delivered the powerful Fourteen Points speech at the joint session of Congress and many other important meetings including the Paris Peace Conference
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