Khoa Kirk Hoang OCHEM 262 Lab: Exp 35- Oxidation + Reduction Tablular Data Pre-Weighted Flask | Product + Flask | Product | % Yield | 5.36g | 5.401g | 0.041g | 41% | (60-70% = Acceptable) Actual Melting Point | Experimental Melting Point | 212C | 199.8 | ------------------------------------------------- (10C-15C variations acceptable) Reasons %yield: A reason that our percent yield is lower then what is acceptable can be due to various reasons. First‚ the amount of product we
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The melting of the polar ice caps and glaciers produce negative effects on environment and humans‚ including habitat destruction and disruption of animal lives. The ice glaciers are slowly melting over time resulting a rise of sea-level. The cause for the sea-level increasing is global warming. The planet’s heat is increasing slowly over time creating the ice glaciers to melt more and more. The global warming is increasing the sea-level resulting more dangerous storms‚ and causing extinction to certain
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virgin polycrystalline silicon which are placed in a quartz crucible along with small quantities of elements called dopants - the most common of which are boron‚ phosphorus‚ arsenic and antimony. The materials are heated to a temperature above the melting point of silicon‚ 1420 degrees Celsius. Once the polycrystalline and dopant combination has been liquefied‚ a single silicon crystal‚ the seed‚ is positioned on top of the melt‚ barely touching the surface. The seed has the same crystal orientation
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renounce” (Ehrlich 91)? Gretel Ehrlich asks these deep questions in her short informative essay “Chronicles of Ice” (2004). Ehrlich tells of her travels to The World Heritage glacier Perito Moreno‚ Argentina. In this short narrative‚ the author uses pathos and strong human related metaphors‚ to relay the direct correlation between glaciers and the well being of Earth. Ehrlich starts her tale‚ by giving information that supports her point but also gives insight to her personal experience. She introduces
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Exercise 1 Binary Solid-Liquid Diagram CHEM 112.1 – 2L Group 2 I. Data and Results Table 1.1 Break and arrest temperature of diphenylamine-naphthalene mixture. Table 1.1. Mole fraction of naphthalene‚ χB‚ and corresponding arrest and break temperature at each run. Run number | Mole Fraction‚XB | Ave. break temperature‚ ˚C | Ave. arrest temperature‚ ˚C | 1 | 1 | 72 | 35.4375 | 2 | 0.868388 | 72 | 35.4375 | 3 | 0.725218 | 62 | 35.4375 | 4 | 0.568895 | 49 | 35.4375
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01). Salt. Retrieved from http://www.foodsubs.com/Salt.html Heidorn Keith‚ K. H. (2001‚ December 1). [Web log message]. Retrieved from www.islandnet.com/see/weather/life/coldimpacts.html Allaby Michael‚ M. A. (2011‚ October 23). Freezing water and melting ice. Retrieved from 0-www.fofweb.com.dsl.starklibrary.org/science Naik Abhijit‚ A. N. (2010‚ December 14). Freezing point of salt water. Retrieved from www.buzzle.com/articles/freezingpoint-of-salt-water.html/ Monwuhea Jeng‚ J. M. (1998‚ November
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MME 3210 Materials Processing Techniques Laboratory Assignment – Sand Casting of an Aluminium 13wt% Silicon Alloy 1) Process Attributes Waste shown yellow* Waste shown yellow* After taking part in the sand casting laboratory session it was made clear that the process possessed many advantages and disadvantage‚ both from the process itself and from the final part produced. Observing the process step by step it was noted that the tasks carried out by the operator were not very difficult
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Our Iceberg is Melting is a story of penguins who are very comfortable with their present existence until a curious penguin named Fred discovered one day as result of curiosity that their iceberg was melting. The iceberg was the foundation of the penguins’ existence and without it they would perish. Fred had the courage to inform Alice who is a member of the Leadership Council about condition of the iceberg. Alice was a penguin who got things done and would listen to Fred. Fred had the opportunity
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Lab #1: Melting Points of Organic Compounds Report Form May 15‚ 2014 1. A “Melting Point Range” refers to the range of temperature at which a solid melts into its liquid state. 2. Pure compounds have narrow or ‘sharp’ melting point ranges‚ 1°C or less if the compound is very pure. A less pure compound exhibits a broader melting point range‚ between 3°C to 10°C as well as a depressed or lower range. 3. Crushing the sample allows for greater surface area-to-volume ratio of the powder‚ this
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’ T he -Laughing Clowns coffee shop is situated in a rural city of Australia. The population is approximately 25‚000‚ yet this figure fluctuates markedly as a major university is situated in the town. The university has a large contingent of external students who fillthe population g~\Pleft by the internal students when they are on term breaks. There are seven coffee shops in the ll)Wn‚‚111d each of them has its own special atmosphere. The Laughing Clowns has been in existe.nce for ten
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