OCR B (Salters) AS level Chemistry UNIT 2 – F332 Elements from the sea Halogens and Halides (group 7 chemistry) * Halogen is the elemental molecule‚ eg/ Cl₂‚ Br₂ * Halide is in a compound‚ eg/ KBr‚ KCl | Fluorine | Chlorine | Bromine | Iodine | Appearance at room temp | Pale yellow gas | Green gas | Dark red volatile liquid | Shiny black solid – sublimes to purple gas | Halide | Colour precipitate with silver nitrate | KCl | White | KBr | Cream | KI | Pale Yellow |
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Activity 4.2: Define hypertension and arteriosclerosis Hypertension is also called high blood pressure. It is a condition where the blood is pumping harder around the body and the arteries have high blood pressure constantly. Arteriosclerosis is when the artery walls harden and the blood has to be pushed harder to get through the arteries. How are they often related? These two conditions are related because when someone gets arteriosclerosis it will lead to getting hypertension. With
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Case Analysis on Macpherson Refrigeration Limited Submitted by The role of the responder Linda Metzler the production planning manager is the main responder in this case‚ she has to come up with another optimal alternative that will have to be submitted to the plant’s General Manager. The plan has to be approved by the general manager for roll out starting next year. Key Issues In order to achieve excellent production capacity and reducing the overall costs the production
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1. If atomic mass of Mg atom is 24 g‚ find mass of 1 Mg atom. 2. Find mass of 1 molecule C2H6. (C=12‚ H=1) 3. Find mole of 6‚9 g Na. (Na=23) 4. Find mass of 0‚2 mol P4 . (P=31) 5. Find mole of 4‚48 liters O2 under normal conditions. 6. Find mass of Fe in the compound including 4‚8x1023 O atoms ;Fe3O4 . 7. 1. Find relation between number of molecules of given matters; 8. I. C2H2 that includes 2mol H atom 9. II. CH4 that includes N atoms (N is Avogadro number) 10. III. C3H4 that includes 1‚5 N C atoms
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DIVISION OF CHEMISTRY :MODULE: GENERAL CHEMISTRY (CHY2021) TUTORIAL # 2 DATE: September 2013 1. Define the following terms: mass number‚ atomic number and the atomic mass unit (amu). 2. With the help of The Periodic Table‚ complete the table below. Symbol Atomic # Proton # Neutron # # of Electrons Mass Number Charge Ar 19 31 17 18 35 20 18 3+ 40 3. In your own words‚ explain Thomson’s and Rutherford’s contribution to the atomic theory. Give sketches to substantiate your answer. 4. Explain
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Lab report As part of my module Nip1002 I was required to perform a set of observational skills which included; pulse‚ blood pressure‚ respirations‚ hand washing and urinalysis and then compare them to previous results. In this lab report I am going to discuss blood pressure in detail. Procedure * Explain the procedure to the patient and gain consent * Wash hands thoroughly following the hand wash technique to prevent the transfer of bacteria * Clean equipment e.g. blood pressure cuff
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A Seminar Report On Working Principal of Steam jet refrigeration system Submitted by Amit Prakash Roll No-1126004 Department of Mechanical Engineering National Institute of Technology‚ Patna Patna-800005‚ Bihar (India)
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April 2001; received in revised form 26 September 2001; accepted 27 September 2001 Abstract Steam jet ejectors are an essential part in refrigeration and air conditioning‚ desalination‚ petroleum refining‚ petrochemical and chemical industries. The ejectors form an integral part of distillation columns‚ condensers and other heat exchange processes. In this study‚ semi-empirical models are developed for design and rating of steam jet ejectors. The model gives the entrainment ratio as a function of
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Introduction Electric fields are produced by charges. Charges may be one of two signs‚ positive or negative. Changing the positions of positive and negative charges can alter an electric field. An electric field is a vector quantity from which the magnitude and direction of an electric force is determined. The electric force is due to the presence of charged particles. Charge is the attribute of matter by which matter responds to electromagnetic forces. Charge is responsible for all electrical
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Case Study “MacPherson Refrigeration Limited” Mohamed Yehia Emam (S1500733) George Gabriel George (S1501034) Table of Contents Table of contents Page 2 1. Introduction Page 3 2. Problem Statement Page 3 3. Performance Measures and Trade-Offs Page 4 4. Assumptions Page 5 5. Iterative Plan Page 5 5.1. Integer Programming Model Page 5 5.2. Integer Programming Model Considering Overtime Page 6 5.3. Integer Programming
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