Chem 234 02/17/13 Lab 2: Melting Points Purpose: To determine the purity of a substance using melting point as physical property. We must also learn how to identify an unknown compound using its melting point. We got to identify an unknown compound using mixture melting point and finally we must learn to obtain an accurate melting point using Mel-Temp apparatus. Procedure: Set voltage to obtain the desired heating rate at the anticipated melting point range. The voltage control controls
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CHRISTIAN HUYGENS Huygens was a Dutch scientist. He lived from 1629-1695. He proposed the earliest theory about the nature of light‚ a phenomena that puzzled scientists for hundreds of years. His improvements on the telescope allowed him to make the first observations of Saturn’s rings and to discover its moon‚ Titan. CARL SAGAN Sagan was an American astronomer. He lived from 1934-1996. He may not have been a great scientist in comparison to others‚ but he is one of the most
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COLLIGATIVE PROPERTIES: FREEZING POINT DEPRESSION AND BOILING POINT ELEVATION DAY 1 – 04 FEBRUARY 2015 Colligative Properties Depends on the NUMBER of solute‚ not on the nature of solute particles Freezing Point Depression Boiling Point Elevation Vapor Pressure Lowering Osmotic Pressure Electrolyte and Nonelectrolytes Electrolytes •Separates in water forming a solution that conducts electric current •IONIC COMPOUNDS Non- electrolytes • does not allow the flow of an electric current • COVALENT
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Engineering and Chemistry Muralla St.‚ Intramuros‚ Manila Melting Point and Boiling Point of Organic Compounds Group No. 5 Manacup‚ Cris Vincent L. Oblena‚ Adrian D. Ong‚ Joshua Jyro B.* *Leader ABSTRACT In compounds‚ two of the physical properties affected by the varying structures are melting point and boiling point. Through the use of the Thomas-Hoover Melting Point Apparatus or the micro method‚ the melting and boiling point of organic compounds are now determined. The aim of this experiment
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In recent times‚ it has become increasing clear that economic development and population growth are resulting in expeditious changes in natural ecosystems‚ globally‚ and particularly on the self-sufficient ecosystems of Hastings Point. In acknowledgment of this‚ the United Nations’ Kofi Annan presented a report: “We the Peoples: The Role of the United Nations in the 21st Century.” (2000) Annan called for Millennium Ecosystem Assessment in order to establish the consequences of change in ecosystems
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represented by the composer in a way that conveys their personal opinion with the aim to influence their responder’s perspective of the issues and themes presented‚ not in an unbiased and even-handed manner. This is evident within both Snow Falling on Cedars written by David Guterson and the 2008 film Invictus directed by Clint Eastwood within which the negative and ongoing impact of racial tension and prejudice is shown‚ and the differing perspectives and understanding of human values is explored by
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The phrase “turning point” has a lot of meanings but personally‚ for me‚ it is a moment that caused me to realize what has always been in front of me. Turning point may also mean a time at which a decisive change in a situation occurs‚ especially one with beneficial results. Recently‚ one event became the turning point of my life and my beliefs. Last Tuesday‚ our class‚ II-St. Therese watched the film “The Encounter”. That movie marked a pivotal moment in my life. It helped me realize that Jesus
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It always has been a little puzzling to figure out what exactly makes a top-notch Inside Sales Person. Well-Run Concepts‚ Inc. has been conducting research to quantify what is needed in the position of Inside Sales today. We used a comprehensive‚ validated‚ step-by-step process called the Trimetrix™ system to determine what is needed for top performance. This article will summarize our findings to date and here is what we found. Attributes tells us if an individual can do the job by looking at
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------------------------------------------------- Top of Form Please read all questions and instructions carefully. Note that you only need to enter answers in terms of numbers and without any symbols (including $‚ %‚ commas‚ etc.). Enter all dollars without decimals and all interest rates with up to two decimals. Read the syllabus for examples. The points for each question are listed in parentheses at the start of the question‚ and the total points for the entire assignment adds up to 100. Question 1 (5 points) Qin deposits his
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Undercover Economist‚ The Tipping Point‚ and Travels of a T-Shirt in the Global Economy After reading the books; “The Undercover Economist”‚ “The Tipping Point”‚ and “Travels of a T-Shirt in the Global Economy” I am left thinking that the Global economy is actually more complicated and intricate than I ever thought and there is an interesting aspect of the world economy that is social. From the popularity of Hush Puppies in New York detailed in “Tipping Point” to the social networks of African
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