Chemistry 200 Exam 1 Review Problems 1. Calculate the number of atoms in 10.0 grams of Fe. 2. Give the mass number‚ #protons‚ #neutrons and #electrons for the isotope strontium-88. 3. Calculate the number of moles of carbon in 50.0 g of benzene C6H6 4. A substance is found to be 38.7 % C‚ 9.7 % H and 51.6 % O by mass. Its molar mass is 62.1 g/mole. What is its molecular formula? 5. Name the following: a) Ca(OH)2 b) KCN c) HClO4(aq) d) FeSO4 e) Na2O f) SF6 g)
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CHEMISTRY OF NICOTINE Date Submitted: March 17‚ 2010 Introduction Tobacco has a long history and has had a significant impact since first introduced to Western society in the 16th century. There is evidence that Native Americans were using tobacco long before the 16th century. They smoked through a pipe for special religious and medical purposes but the worldwide spread of tobacco was initiated as a result of European discovery by Spanish‚ Portuguese and French explorers.(1‚2) Christopher
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“Living With The Past” by Art Vandalay June 15‚ 2013 In all honesty I did not hear the term Post Traumatic Stress Disorder (PTSD) until some time after I re-deployed from Iraq in mid August 2003. Surely the term had been around long before them‚ but it wasn’t commonly used acronym in the military. I didn’t have nearly the frequent use that is has in today’s Army. Nowadays‚ everything a Soldier does is associated with PTSD even if the Soldier has not been diagnosed with it; it has become
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Food Chemistry: Option F Food Groups: F.1 Food & Nutrients Food: any substance‚ whether processed‚ semi-processed or raw‚ which is intended for human consumption‚ and includes drinks‚ chewing gum and any substance which has been used in the manufacture‚ preparation or treatment of “food” but does not include cosmetics or tobacco or substances used only as drugs. Nutrients: any substance obtained from food and used by the body to provide energy‚ to regulate growth‚ and to maintain and repair
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General Chemistry I CHEM XXI Project Report Worksheet (4 pages max.) Experiment title: How Do We Identify an Unknown Substance? Guiding questions: State the question or questions that that you were trying to answer in this lab. How do you determine the two unknown types of plastic? What are the two unknown plastics? Safety considerations: Briefly describe the safety measures you had to take to perform the experiments. Before entering the lab‚ I put on my
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IGCSE COURSEWORK - CHEMISTRY Name:Alessia Rovegno Class: S3scA Teacher: Mr tinwin Date:1-3-13 Experiment number: Ch 3 Title: Which is the Best Fuel? Mark awarded: C1 Coursework checklist (Following instructions) | Needed for | Student | Teacher | Comments | Follows written‚ diagrammatic or oral instructions to perform a single practical operation –measures water vol | 2 | | | | Use familiar apparatus and materials adequately and safely – safety glasses | 4 | | | |
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The Supporting People programme RESEARCH PAPER 12/40 16 July 2012 The Supporting People programme was launched in 2003 as a £1.8 billion ring fenced grant to local authorities intended to fund services to help vulnerable people live independently. The level of the grant was reduced in subsequent years‚ and in the 2010 Spending Review the Government announced that the Supporting People national funding levels would decrease from £1.64 billion in 2010/11 to £1.59 billion in 2014/15. In 2009‚ the
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References: Petrucci‚ Ralph H.‚William S. Harwood‚ and Geoffrey F. Herring (2002). 8th edition. Masterton‚ William L. Cecile N. Hurley‚ and Edward J. Neth (2011). 7th edition. Chemistry: Principles and Reactions. CENGAGE Learning. Equilibrium Constants. http://www.ausetute.com.au/equicons.html Retrieved last: April 24‚ 2012. Appendix K2K1’ = K = (9.77x1012)(37) K = [Cr2O72-] = 3.61x1014
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References: Gilbert‚ John C. and Martin‚ Stephen F. Experimental Organic Chemistry: A Miniscale and Microscale Approach. Thomson Brooks/Cole‚ Pacific Grove‚ CA‚ 2006‚ 4th Edition.
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special occasions like independence day. The excitement produced by fireworks like ‚ brightening the night sky and plunging it with vivid displays of colour and insignificant‚ which makes them a crowd pleaser. Behind all the excitement of fireworks‚ chemistry plays an important role in creating the vivid colours we witness lighting up the sky. The actual chemical reactions that take place in the explosions require the use of oxidisers‚ reducing agents and binders. The additions of varying metal chlorides
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