from: | | | Student Response | Value | Correct Answer | Feedback | A. | nucleic acids. | | | | B. | amino acids contained in dietary protein. | 100% | | | C. | urea. | | | | D. | ammonia. | | | | | Score: | 0.1/0.1 | | | 2. | Quest#2 | | Ammonia is converted to urea in the: | | | Student Response | Value | Correct Answer | Feedback | A. | heart. | | | | B. | brain. | | | | C. | kidney. | | | | D. | liver. | 100% |
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inorganic or organic compounds that replenish the soil with additional nutrients to increase growth and keep plants healthy. In 2001‚ 53 million tons of fertilizer was used by the agricultural industry in the United States. Nitrogen fertilizers use ammonia as the building block for the production of water-soluble nitrogen-containing compounds‚ such as ammonium nitrate. Phosphorus is mined from natural geological deposits and mixed with sulfuric acid to make water-soluble phosphate compounds. Potassium
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Name: __________________________________ ( ) Class: 4Q HWA CHONG INSTITUTION PRELIMINARY EXAMINATION 2010 CHEMISTRY 5072 Paper 1 Time: 1 hour INSTRUCTIONS TO CANDIDATES Do not turn the pages over until you are told to do so. Write your name and index number on the answer sheet in the spaces provided. There are forty questions on this paper. Attempt all questions. For each question‚ there are four possible answers labelled A‚ B‚ C and D. Choose the one you consider correct and
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ENERGY BALANCE Desulphurizer Here Sulphur in Naphtha is made to react with Hydrogen in presence of catalysts to give Hydrogen Sulphide. This reaction takes place at a temperature of 623 K H2 + S Hydrogen and Naphtha are assumed to be stored at 303 K Specific Heat capacity of naphtha is assumed to be 3.5235 kcal/kmol Specific Heat capacity of Hydrogen =(6.62+0.00081T) kcal/kmol K ∆H = ∑ ni ∫ C pi dT = 6.015915 x10 6 kcal hr i Hence heat required to raise their temperature from 303 K to
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Amines and Amides Amine - an ammonia molecule (NH3) in which one or more H atoms are substituted by an alkyl or aromatic group. Amide - an organic compound with a carbonyl functional group (C=O) bonded to a nitrogen atom. Amines are the smaller and simpler products of the decomposition of larger and more complex organic compounds like proteins. They often have foul odours‚ as do many nitrogen compounds‚ such as the smell of rotting fish and decomposing animal tissue and are produced by
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Humankind is largely fed by food grown with synthetic chemical fertilizer and by explosives like Dynamite. Synthetic fertilizer requires a plentiful supply of nitrogen‚ inventing a process to fix it in ammonia was daunting. Attempts were made for over 100 years. Then in 1909 Fritz Haber‚ a German chemist‚ solved the problem in principal. In 1910‚ Carl Bosch‚ pioneering new engineering methods‚ commercialized the process. Known as the Haber-Bosch Process‚ it is now responsible for growing about half
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particles are in constant motion. 4. There are forces that act between the particles. METHODOLOGY Materials and Apparatus CuSO4 (size of a rice grain) Phenolphthalein indicator Ammonia solution (1 M NH3) Iodine crystals (I2) Graduated cylinder Procedure: Part 1 Diffusivity 1. Place a small amount of iodine in a beaker. Cover the beaker with a watch glass. Place a wet tissue paper on top of the watch glass
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first of reaction of sodium hydroxide with hydrochloric acid and sodium hydroxide with ammonium chloride. Using Hess’ Law and the results for the enthalpy change of the first two reactions should give the enthalpy change of the third reaction of ammonia with hydrochloric acid. Procedure: Part 1: Construct a calorimeter of two nested stereophony cups where the cover has a hole to fir a thermometer. Measure 50ml distilled water at room temperature into the calorimeter. Measure the temperature
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URALCHEM reports the results of the Annual General Meeting of Shareholders United Chemical Company URALCHEM‚ OJSC reports on the decisions taken by the shareholders at the Annual General Meeting held on 30th June‚ 2014. Moscow‚ Russia (July 2‚ 2014) -- United Chemical Company URALCHEM‚ OJSC reports on the decisions taken by the shareholders at the Annual General Meeting held on 30th June‚ 2014. The company’s shareholders approved URALCHEM’s annual report and annual financial statements for
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Ashley Gonzales Dana Ronquillo Chem 12/E January 9‚ 2015 Experiment 20A - Introduction to Acids and Bases Purpose: 1. to become familiar with a variety of typical laboratory test for acids and bases 2. to develop operational definitions of acids and bases 3. to develop conceptual definitions of acids and bases 4. to test a variety of household products and classify them as acids or bases Materials: Refer to “Heath Chemistry- Laboratory Experiments” p.230-231 Procedure: Refer to “Heath Chemistry-
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