A carboxylic acid is an organic acid characterized by the presence of at least one carboxyl group. The general formula of a carboxylic acid is R-COOH‚ where R is some monovalent functional group. A carboxyl group (or carboxy) is a functional group consisting of a carbonyl (RR’C=O) and a hydroxyl (R-O-H)‚ which has the formula -C(=O)OH‚ usually written as -COOH or -CO2H. Carboxylic acids are Brønsted-Lowry acids because they are proton (H+) donors. They are the most common type of organic acid. Among
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Jennifer Everett Phase 4 DB Instructor: Clement Yedjou 3/10/2015 Acid rain Acid rain is a result of air pollution that is harmful to the environment‚ generally caused by fuels being burnt. When any type of fuel is burnt‚ many different chemicals are produced. These gases that are released react with the water in clouds‚ and the rain from these clouds is acid rain. This type of acid disposition can appear in many other forms besides just rain‚ such as sleet‚ snow‚ and fog (Editorial Board‚ 2013)
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actual flights. | Contents Current Business Activities and Operations: 3 List of Business Rules: 4 Entities and Attributes: 5 Relationship Types: 6 Primary Keys: 7 Foreign Keys: 8 Normalization: 9 Entity Relationship Diagram: 10 Referencing: 11 Current Business Activities and Operations: Hotel reservation systems are used to track and maintain records of hotel schedules‚ visitor’s reservations and room assignments‚ check-in inventory‚ and fare tariffs. The modern hotel
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BALANCE OF PAYMENT (BOP) Introduction: Balance of payments (BOP) is a record of economic transitions between the residents of one country and the rest of the world during one year. The balance of payment like all balance sheets must balance. The items‚ which lead to‚ an inflow of foreign earnings are placed on the credit side of the balance sheet‚ whereas the items‚ which give‚ rise to an outflow of foreign currency are placed on the debit side. Definition: “Balance of payment is a systematic
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prepares its master budget on a quarterly basis. The following data have been assembled to assist in preparing the master budget for the first quarter: a. As of December 31‚ 2011 (the end of the prior quarter)‚ the company’s general ledger showed the following account balances: DEBIT CREDIT $ $ Cash 48‚000 Accounts receivable 224‚000 Finished goods Inventory (1000 units) 60‚000 Raw Materials inventory (500 units) 10‚000 Buildings and equipment (net) 370‚000 Accounts payable 93‚000 Capital stock 510
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Science one world essay – Acid Rain Acid rain has been an important global issue for centuries. Although most acid rain is caused by human activities‚ some acid rain occurs naturally. An example of natural acid rain is erupting volcanos‚ they give off smoke containing water vapor‚ carbon dioxide‚ sulphur dioxide and nitrogen compounds. The sulphur dioxide and nitrogen compounds cause small amounts of acid rain near the volcano. Pure water is not an acid‚ but even clean rainwater is slightly acidic
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Is there really such a thing as rain with acid in it? Yes‚ acid rain is a very real phenomenon worldwide‚ and it’s been documented since the 1800s‚ as the Industrial Revolution caused the burning of fossil fuels like coal‚ gas and oil. When these fuels or any other organic material like wood or paper are burned‚ they release compounds like sulfur dioxide (SO2) and nitrous oxides (NOx) into the air. Are SO2 and NOx the causes of acid rain? Indirectly‚ yes. When SO2 and NOx enter the atmosphere
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Common Aspects of Acid Prehydrolysis and Steam Explosion for Pretreating Wood Hans E. Grethlein Michigan Biotechnology Institute‚ PO Box 27609‚ Lansing‚ Michigan 48909‚ USA & Alvin O. Converse Thayer School of Engineering‚ Dartmouth College‚ Hanover‚ New Hampshire 03755‚ USA Abstract The initial rate of hydrolysis using cellulase from Trichoderma reesei for various wood samples is directly proportional to the surface area available to the enzyme. Both dilute acid hydrolysis in a continuous
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Exercise #4 1. Working without taking a break. We try to get as much work done as we can in an hour. We work without taking breaks to get as much work done as we can in an hour. 2. I needed to bring work home. In order to meet the deadline. I need to bring work home in order to meet the deadline. 3. Unless the ground thaws before spring break. We won’t be planting any tulips this year. Unless the ground thaws before spring break‚ we won’t be planting any tulips this year. 4. Turning the lights
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BENZOIC ACID & BENZOATES (210 –218) • Retards growth of bacteria and yeasts • Occurs naturally in many foods – a similar distribution to salicylate (but at a lower dose than as an additive) • Common food sources: Soft drink‚ cordial‚ fruit juice and cider Liquid essences and syrups Iceblocks‚ jelly‚ low joule jam‚ dips‚ pickles‚ olives Fish marinades and preserves • PABA (para-amino-benzoic-acid)
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