Topic 6 Microscopic World II Unit 23 Shapes of molecules Unit 24 Bond polarity and intermolecular forces Key C o ncepts Microscopic World II Shapes of molecules • Covalent molecules with non-octet structures • Shapes of molecules • The VSEPR theory • Molecular crystals of buckminsterfullerene (C60) • Carbon nanotubes Bond polarity and intermolecular forces • Electronegativity and bond polarity • Van der Waals’ forces • Factors affecting the strength
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Main paper 2010 (Answer all questions on paper) Section A (1) Outline the facts of Carlill v Carbolic Smoke Ball‚ what area does it relate to and what principles does it outline? (2) Partridge v Crittenden outlines which contractual principle? (3) What is an invitation to treat? Use cases to back up your answer. (4) What is the postal rule? Use cases to back up your answer. (5) What does ADR stand for? Give examples of the general advantages of ADR. (6) What are main types and related advantages
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written permission of theAuthor. cxcDirect Institute Mandeville‚ Jamaica Email: admin@cxcDirect.org Website: www.cxcDirect.org Telephone: 876 469-2775‚ 876 462-6139 © cxcDirect Institute © cxcDirect Institute ** Please see the original past paper for the questions. Only the answers will be provided as per copyright obligations. ********************************************************** ii) iii) 6a b 12a b= 6a b b 2a 2m 9m – 5 let pq = ac ; p+q = b p+q = 9 pq = -10; p = 10‚ q
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Appendix APPENDIX 1 Chemical tests for functional groups Homologous series/ Typical compound Functional group(s) Alkanes CH3CH3 ethane C – C and C–H Alkenes CH2 = CH2 ethene C=C Chemical tests/Observations Add liquid bromine in ultraviolet light (or sunlight): White fumes of HBr liberated; decolourisation of bromine occurs slowly (a) Add Br2 in CCl4 at room temperature: Decolourisation of bromine occurs immediately CH2 = CH2 + Br2 → CH2BrCH2Br (b) Add acidified
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Advertising Past and Present Paper MKT/447 July 20‚ 2012 Advertising Past and Present Paper Introduction Advertising is considered as a nonpaid platform to communicate the target customers about the products and services (Hill‚ O ’Sullivan & Hill‚ 2003). There are different tools and tactics that are used in advertising. It is true that over the years‚ the form of advertising has changed in a dramatic manner. Taste & preferences of target market have changed that resulted into the
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Data-based questions Study the photos below and answer the following questions. Photo A Photo B Photo C (a) What are industries shown in photos A‚ B and C respectively? (3 marks) (b) Draw a diagram to illustrate the manufacturing system of the industry shown in photo A. (4 marks) (c) Describe and explain the characteristics of these three industries. (i) Photo A (3 marks) (ii) Photo B (3 marks) (iii) Photo C (in tradition) (3 marks) (d) How do personal factors affect
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Isotopes and average atomic mass Isotope: element variations with different atomic mass but same atomic number Isotopic Abundance: the relative amount in which each isotope of an element Calculating: given 2 isotopes of an element [B: 10.01u] [B: 11.01u] 1) Given average atomic mass: 10.81u If given percentages‚ you can find average atomic mass by adding each portion 2) Set variables for unknown values Let x represent % abundance for 10/5 B Let 1-x represent % abundance for 11/5 B Calculate:
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of air. He considered that this difference had been caused by experimental errors. About 100 years later‚ Lord Rayleigh and Sir William Ramsey discover Argon in 1894. For Ramsey‚ it is was as early as 1885-1890 when he published several notable papers on the oxides of nitrogen and followed those up with the discovery of Argon‚ Helium‚ Neon‚ Krypton‚ and Xenon. Led to the conclusion by different paths and‚ at first‚ without working together‚ both Lord Rayleigh and Sir William Ramsey succeeded in
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SECTION I THEORY – 60 marks Answer ALL questions. 1. (a) Name the input or output device that is BEST suited to perform EACH of the following activities: i) Viewing images from one computer to another over the internet (1 mark) ii) Producing architectural drawings such as building plans (1 mark) iii) Playing games using the computer (1 mark) iv) Retrieving information electronically from a code on a product (1 mark) v) Identifying users by scanning their fingerprints (1 mark)
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Terrius Watson Dr. Kitchens Chemistry 4 March 2013 Chemistry Matters Cooking is chemistry. Everything is essentially chemical reactions. If you don’t mix the correct amount of grams of one element with another the product can result to be horrendous. The formula of sugar is C12H22O11. When you mix a certain amount of that into a solution of water with the addition of tea you a drink called sweet tea. Let’s say you mix add more C12H22O11 than water. Then your product will be syrup; a completely
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