Keghan Chapter 8 MULTIPLE CHOICE QUESTIONS Topic: Structure Elucidation 1. An alkene adds hydrogen in the presence of a catalyst to give 3‚4-dimethylhexane. Ozonolysis of the alkene followed by treatment with zinc and acetic acid gives a single organic product. The structure of the alkene is: CH3 A) CH3CH=C-CHCH2CH3 (cis or trans) CH3 CH3 B) CH3CH2C=CCH3 (cis or trans) CH2CH3 C) CH3 CH2=CCH2CHCH2CH3 CH3 CH2 D) CH3CH2CCHCH2CH3 CH3 CH3 E) CH3CH2CHCHCH=CH2
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CELL STRUCTURE CELL THEORY: Structural and functional unit of all living things New cells arise from already existing cells Cells contain information that instructs growth. This information can be passed onto new cells. MICROSCOPES: There are two main types of microscopes: Light and Electron Electron Micrographs- shown in colour LIGHT ELECTRON Uses beam of light Magnification = x1500 Resolution = 200 nm Wide range of specimens can be used Samples are fairly quick + easy to prepare
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CH 222 ANALYTICAL CHEMISTRY I SYLLABUS COURSE OUTLINE: a. Introduction (1.5 hours) Classification of types of analysis‚ role and importance of analytical chemistry in various aspects of life. b. Steps in a typical quantitative analysis (10 hours) Emphasis on sampling protocol‚ sample preparation‚ wet chemistry methods‚ statistical evaluation of data. c. Review of concepts of stoichiometry (2 hours) Mole concept‚ concentrations‚ dilution and aliquots d. Review of concepts of equilibria
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keeps on exploring ways to deal with new issues in order to achieve food safety. Food safety regulations are important and promising regulations‚ they gives a deeper understanding of the public and private standards and risk regulations. National food safety regulations and standards are a fundamental part of the food control system. The modern conception of food control places direct responsibility for ensuring the safety of food on all operators in the food chain. They must be able to demonstrate
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Joseph Moore Professor N. Esposito English 101 February 27‚ 2011 There Should Be No Question When It Comes To School Bus Safety: School bus accidents almost always bring some sense of anxiety. It does not matter if it includes injuries or if there are no injuries‚ the general population always fears the worse. The statement of “children are safer on the bus” goes right out the window when a parent is informed their child has been involved in an accident while riding the bus to or from
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Regents Chemistry Quarter 1 Midterm Review 1. The percent by mass of oxygen in Na2SO4 (formula mass = 142) is closest to 1) 11% 3) 45% 2) 22% 4) 64% 2. Given the unbalanced equation: __Al(s) + __O2(g) → __Al2O3(s) 3. 4. 5. 6. 7. balance the equation using smallest whole number coefficients. The percent by mass of aluminum in Al2O3 is approximately 1) 18.9 3) 47.1 2) 35.4 4) 52.9 What is the approximate percent composition by mass of CaBr2 (formula mass = 200)
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Running head: Organic Chemistry Tamanna Ashraf Palm Beach State College Principle of Chemistry Ceravolo‚ Joseph MW 11:00am-12:15pm February 6th‚ 2011 We all are living in a science world. Everything has some kind of reaction going on in our living area. It is just we do not get to see or realize that where n how we having our life much easier than it used to be. In these writing assignments‚ the topic is about the organic chemistry. In organic chemistry‚ we all have different kinds of compounds
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Anthony Martinez Mr. Hruby Chemistry R Period 4(5A) Name & Symbol: Platinum (Pt) Properties: -Atomic Number: 78 -Atomic Mass: 195.084 amu -Appearance: Shiny‚ smooth surface‚ silver like‚ solid. Melting point (K): 2045 Boiling point (K): 4100 Valence electrons: (+1)‚ +2‚ (+3)‚ +4‚ +6 Atomic radius (pm): 139 1st Ionization energy (kJ/mol): 868.1 Electronegativity: 2.28 Natural Occurring Isotopes: Six stable isotopes of platinum occur in nature (190‚ 192‚ 194
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Background checks would require government databases that keep personal individual information on gun owners‚ including name‚ addresses‚ mental health history‚ criminal records‚ and more. More gun control is not needed; education about guns and gun safety is needed to prevent accidental gun deaths. Guns don’t kill people‚ people kill people and people need more gun education and mental illness screening to prevent massacres. The second Amendment was intended to protect gun ownership of all vigorous
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The loyalty to public safety any employee has depends on their job‚ but there is a minimum baseline. “Do no harm”‚ derived from the Latin principle‚ Primum Non Nocere‚ states that any individual’s well-being is a primary consideration‚ and individual’s should act in society’s best interests. This concept applies to occupations such as law enforcement‚ in which employees promise to uphold public safety‚ and strive to protect the public. However‚ sometimes these promises don’t always follow suit‚ and
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