-1A2 CHEMISTRY MODULE 4 definitions (aqa) Rate of Reaction The rate of change of concentration with time (mathematically d[X]/dt). Units are mol.dm-3.s-1 (moles per cubic decimetre per second) Initial Rate This is the rate at the very beginning of the reaction when all the starting concentrations are known exactly. Rate Equation Rate Expression A mathematical expression which relates the rate to the concentrations of substances involved in the reaction Rate Constant‚ k This is the multiplying
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Virtual Lab Unit 3 1. Briefly describe the steps required to aseptically transfer bacteria from an unknown to a tube of liquid broth. You might have to research this using the "T" button (Tell Me More About...) To aseptically transfer bacteria from an unknown to a tube of liquid broth you have to flame the loop or wire before you begin to sterilize it. You then remove the caps from the tubes and flame the mouths of the tubes to prevent air-borne contamination. When all this is done‚ you have to
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with a beautiful lustrous sheen. It is malleable and ductile and has a high melting point. Platinum does not oxidize in air even at high temperatures and is unaffected by common acids. It is also corroded by halogens‚ cyanides‚ sulfur‚ and caustic alkalis. Gravel- is composed of unconsolidated rock fragments that have a general particle size range and include size classes from granule- to boulder-sized fragments. Gravel is an important commercial product‚ with a number of applications. Many roadways are surfaced with
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HAZCOM Safety Training Presentations Presented by Mark Cole Close Encounters with Chemicals We encounter chemicals almost every day – – – – Filling your vehicle with gasoline Cleaning the bathroom Applying pesticides or insecticides Using solvents or acids at work Many chemicals can cause injury or illness if not handled properly. Hazard Communication ‘Goals’ Right to Know chemical hazards PPE‚ first aid‚ spills/leaks Labels‚ Material Safety Data sheets Right to Know OSHA created
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-425.93 -92.30 -407.27 -285.83 Hess’s Law: ΔH(rxn) = Sum[ΔH(f) products] - Sum[ΔH(f) reactants] ΔH(rxn) = [(1 mol)(-407.27 kJ/mol) + (1 mol)(-285.83 kJ/mol)] - [(1 mol)(-425.93 kJ/mol) + (1 mol)(-92.30)] = - 359.47 kj/molWhy are there energy changes when a chemical reaction takes place? Do physical state changes involve energy changes? Exothermic energy changes and endothermic energy changes in chemical reactions are described‚ and exothermic reactions and endothermic reactions are discussed
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CHemistry project ..... CHEMISTRY INVESTIGATORY PROJECT TOPIC: RAYON FIBRE BY:- VIKRAM RAO XII – B OBJECTIVE OF THE PROJECT This project is aimed at preparation of rayon thread from filter paper employing cuprammonium process INTRODUCTION Rayon is the oldest commercial manmade fiber. The U. S. Trade Commission
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According to Republic Act 5173‚ to ensure all safe passage of all vessels and watercrafts thru all navigable waters subject to the jurisdiction of the Philippines‚ the construction of all bridges over navigable waters has to be referred to the PCG for issuance of appropriate clearance‚ particularly confirming that the structure would not be hazardous to navigation. In addition to Republic Act 5173‚ the navigational span of the bridge should be provided in a way that it does not
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Nucleic Acid Structure & Function Charlotte V. Bañes‚ MD Department of Biochemistry Introduction ORGANISM Store and preserve information Pass information to future generations Express information during life’s processes GENETIC INFORMATION Coded along a polymeric molecule (DNA) the chemical basis of heredity Organized into genes units of DNA that encodes a protein or DNA Central Dogma of Molecular Biology Gene Expression & DNA Replication “The genetic information
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Anil Kaura Chemical milk‚ popularly termed as "synthetic milk"‚ is the invention of devil-minded mafia of certain milk traders. Of late reports have been received that large quantities of such spurious and fatal product have found way in markets of Rajasthan‚ Himachal Pradesh‚ Uttar Pradesh‚ Bihar‚ Madhya Pradesh‚ Karnataka and Orissa. The monster is surfacing in Punjab and Haryana also. Chemicals like urea‚ caustic soda‚ refined oil (cheap cooking oil) and commonly used detergents are used in
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ANDREWS UNIVERSITY AFFILIATED AND EXTENTION PROGRAMS UNIVERSITY OF THE SOUTHERN CARIBBEAN P.O. BOX 175‚ PORT OF SPAIN Assignment: Thesis An Assignment Presented in Partial Fulfilment Of the Requirements for the course ENGL215-02: English Composition 2 03 October 2012 INSTRUCTOR: By Why is Dark Chocolate Healthier than regular Chocolate Chocolate is made from plants‚ which means it contains many of
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