Ben Quinones AP Chem Mr. Perry 25 January 2013 Molar Mass by Freezing Point Depression Conclusion: My Lab unsuccessfully found the molar mass of the unknown given to us in the lab. We were tasked with finding the molar mass of an unknown compound using the colligative property of Freezing Point Depression. The way we did this was first finding the temperature at which ice crystals form for just regular BHT. Luckily thanks to our TA we were given temperature probes so we could pinpoint exact
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From Famine to Five Point Five Points is‚ as the extended title boasts‚ "The 19th century New York neighborhood that invented tap dance‚ stole elections and became the world’s most notorious slum." Unlike most subtitles that promise all by the moon and the stars‚ all these statements and more are absolutely true. The Five Points neighborhood quite literally defines the term melting pot‚ a mixture of cultures‚ faiths and political ideologies that was at one time volatile but also a source of amazing
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slavery in America. But it wasn’t that easy to just end slavery just like that and have these amendments passed. There have been multiple wars and many discussions between world leaders just because of the discussion of ending slavery. The major turning point in the discussion for the end of slavery was the Haitian war. Where black people stood up and fought against their masters‚ establishing their independence. This got the world talking about slaves and how human they really were since slaves were thought
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The book Pivot Point is a book full of “what ifs”. In the beginning‚ Addie Coleman‚ the main character‚ gets home from a normal day of school. When Addie walked into the living room to tell her mom and dad how her day at school was‚ Addie noticed it was eccentric her parents were sitting on opposite sides of the couch. Waiting to find out why they’re not sitting next to each other‚ Addie’s mom amicably told her they are going to file for a divorce and she needs to decide which parent she wants to
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Freezing Point Depression Purpose: The purpose of this lab is to demonstrate freezing point depression by dissolving salt into two liquids and monitoring temperature. Materials: test tube‚ Thermometer‚ 10 mL graduated cylinder‚ 2 micropipettes‚ Styrofoam cups‚ 4 pieces plastic wrap‚ 70% ethyl rubbing alcohol‚ 91% isopropyl rubbing alcohol‚ ice‚ distilled water‚ rock salt Procedure: Using the graduated cylinder‚ measure 2 mL of alcohol and pour it into the test tube. Add 10 mL of
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Homeostatic Mechanism using the Comparitive Melting-Point Method for two Crab Species. Abstract Two crab species‚ Plagusia and Cyclograpsus‚ were collected from a local estuary in the littoral and deep water zone for osmoregulation studies. To examine differences in osmoregulatory mechanisms among the species‚ haemolymph of the specimens was extracted once they were acclimated to varying concentrations of seawater. Using the comparative melting-point‚ capillary tubes were filled with small samples
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Development Center September 1998 One of the most common tools used in evaluating the economic feasibility of a new enterprise or product is the break-even analysis. The break-even point is the point at which revenue is exactly equal to costs. At this point‚ no profit is made and no losses are incurred. The break-even point can be expressed in terms of unit sales or dollar sales. That is‚ the break-even units indicate the level of sales that are required to cover costs. Sales above that number result
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STRENGHTS GMA’s creation of six to ten million jobs within her six years administration is possible considering many factors that can help build up those number of jobs that will provide living to the unemployed‚ support three million entrepreneurs and the micro‚ small and medium enterprises and develop 2 million hectares of land for agricultural businesses. This job generation has been expected to raise two million new jobs by the development of new lands‚ three million for the micro enterprises
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Levels of Life Worksheet Complete all three parts of this worksheet. Part I Atomic Structure Fill in the missing information on atomic structure and organic compounds. Atomic StructureSubatomic ParticleChargeLocation in an AtomProtonPositiveNucleusNeutronNeutralNucleusElectronNegati- veCircular Orbit around nucleus Organic CompoundsLarge Biological MoleculeAtoms it ContainsMonomer(s) Function(s) in Living OrganismsCarbohydratesC‚ H‚ and OMonosaccharidesSource of energyLipidC‚H and OGlycerol and
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IONIC COMPOUNDS In chemistry‚ an ionic compound is a chemical compound in which ions are held together in a lattice structure by ionic bonds. Usually‚ the positively charged portion consists of metal cations and the negatively charged portion is an anion or polyatomic ion. Ions in ionic compounds are held together by the electrostatic forcesbetween oppositely charged bodies. Ionic compounds have high melting and boiling points‚ and they are hard and very brittle. Ions can be single atoms‚ as the sodium and chlorine in
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