chemical element with the symbol F‚ atomic number 9‚ 9 electrons and protons‚ 10 neutrons‚ and the atomic mass of 19. Being the lightest halogen‚ it has one stable isotope‚ fluorine 19. At standard pressure and temperature‚ the element is a pale yellow gas as a liquid its a bright yellow. The electrons are located outside the nucleus of the atom. Electrons are organized in such a way that the space between them are inter dispersed. Within this space are distinct distances up to 100‚00 times away from
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Bhopal Gas Tragedy Product - Brand name Sevin (Union Carbide) - Third most used insecticide in US - Not fatal to people Carbaryl - Does not cause cancer Chemistry TLV = 0.02 ppm Methyl isocyanate Methyl Isocyanate (MIC) Clear‚ colourless‚ b.p. 39oC‚ odour threshold 2.1 ppm Effects of 0.4 ppm - Coughing - Chest pain - Breathing pain (dyspnea) - Asthma - Eye irritation - Nose‚ throat‚ skin damage Effects of 21 ppm - Lung oedema - Emphysema (damage of lung tissue) - hemorrhaging - bronchial
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GAS DYNAMICS AND JET PROPULSION 1. What is the basic difference between compressible and incompressible fluid flow? Compressible 1. Fluid velocities are appreciable compared with the velocity of sound 2. Density is not constant 3. Compressibility factor is greater than one. 2. Write the steady flow energy equation for an adiabatic flow of air. In an adiabatic flow q = 0. Therefore energy equation becomes. 2 c12 c2 h1 + + gZ1 = h2 + + gZ 2 + Ws 2 2 Incompressible 1. Fluid velocities are small
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Marketing Research Planned Projects‚ Goals and Objectives Starbucks is now starting there two new major projects which are the “Our Next 40 Years Begins Now” and “Explore Green Store”. The project‚ “Our Next 40 Years Begins Now”‚ started on March 8‚ 2011 marked its 40th anniversary‚ and as part of their celebration they had introduced their new logo. “As you start to see it out in the world‚ I hope you’ll start to appreciate the simplicity and elegance of the new design. I like the new mark
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the other nearest barangay. Facilities for motor vehicle repair are often a part of the station. Of course today there are gas stations everywhere‚ but when cars were first invented gas stations weren’t around yet. People actually bought gasoline at the general store. People filled buckets with gasoline and used a funnel to pour it into the car’s gas tank. C. Significant of the Study The proponent has to establish the proposed business that will serve a large
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Student ID: 4593119 Date: 7 Dec 2014 Course and Section Number: SCIN131 A004 Fall 14 Lesson 4 Lab: Chromatography and Ionic versus Covalent Bonds PART 1 Begin by viewing the following Thinkwell video 15.1.3 CIA Demonstration: Chromatography After you watch the above video‚ answer the questions below in sufficient detail: (a) (3 pts.) This video discusses 3 different types of chromatography. List each one mentioned‚ and describe their differences in as much detail as possible (your points
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CHROMATOGRAPHY _TOPIC_ : 7.2 _RESEARCH QUESTION:_ What is chromatography? How many pigments are there in a plant? How the different pigments in a plant can be separated? _APPARATUS_ : Please refer to the handout _MATERIAL_ : Please refer to the handout _METHOD_ : Please refer to the handout _DATA COLLECTION_: Coloured band Pigment front distance (± 0.05cm) Solvent front distance (± 0.05cm) Green 11.7 13.0 Yellow 12.5 13.0 _DATA PROCESSING_: Coloured band Pigment
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very efficient for transporting a variety of substance around the body. Ventilation: gaseous exchange is also a very important for exchanging materials. Oxygen and carbon dioxide are able to move easily between the lungs and the blood by diffusion. Gas and solute exchange surfaces in humans have been adapted to maximise their effectiveness. The larger an organism gets and the more complicated it is which makes it harder for materials to be exchanged. Gaseous exchange is the process by which oxygen
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and ensure it to zero Let By Testing • I ensure the ECV is off • I made sure all appliance is in the off position • Then i get my stop watch to time • I then remove the test nipple screw and put it safe • I then let out the residual gas • Attach the manometer hose to the meter test nipple • manometer is then put on a level surface vertically • cooker lid is in the open position • Open ECV and allow the meniscus to rise to 10 mbar • I then close the ECV • Then time for
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Organic Chem II Lab 2/15/15 Friedel-Crafts Acylation of Ferrocene and Column Chromatography Introduction: The intention of this lab is to analyze the formation of acetylferrocene using column chromatography. The Friedel-Crafts acylation reaction created acetylferrocene and diacetylferrocene‚ using phosphoric acid as a catalyst for the reaction between acetic anhydride and ferrocene (once applying heat). During column chromatography‚ a solution is passed through a filtration system of silica‚ sand‚ and
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