the following for the reaction N2 + 3 H2 ( 2 NH3 • The rate expression for the reaction • The order of the reaction in each of the reagents • The overall order of the reaction 2) The rate constant for the reaction HNO3 + NH3 ( NH4NO3 is 14.5 L / mol.sec. If the concentration of nitric acid is 0.050 M and the concentration of ammonia is 0.10 M‚ what will the rate of this reaction be? 3) When two compounds‚ A and B‚ are mixed together‚ they form compound
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An antioxidant is a molecule that inhibits the oxidation of other molecules. Oxidation is a chemical reaction involving the loss of electrons. Oxidation reactions can produce free radicals. These radicals can start chain reactions. When the chain reaction occurs in a cell‚ it can cause damage or death to the cell. Antioxidants terminate these chain reactions by removing free radical intermediates‚ and inhibit the oxidation reactions‚ hence prevent the damage caused by oxidation to cells. Therefore‚ if we have insufficient
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Title: Nitration of Methyl Benzoate Objective: To prepare methyl-3-nitrobenzene from nitration of methyl benzoate. Results and calculations: Density = 1.094 g/ml = Mass of methyl benzoate = 1.094 g/ml x 2.8 ml = 3.0632 g no. of mol of methyl benzoate = = 0.022499 mol 1 mol of methyl benzoate produced 1 mol of methyl m-nitrobenzene. Therefore‚ 0.022499 mol of methyl benzoate produced 0.022499 mol of methl
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References: Liang‚ F.‚ Xu‚ B.G.‚ Shi‚ X.H.‚ Ming‚ S.R.‚ “Advances in desulfurization with wet oxidation process”‚ Modern Chem. Ind.‚ 23 (5)‚ 21-24 (2003) McManus‚ D.‚ Martell‚ A.E.‚ “The evolution‚ chemistry and applications of chelated iron hydrogen sulfide removal and oxidation processes”‚ J. Mol. Cat. A.‚ 117 (1)‚ 289-297 (1997). their iron complexes”‚ Inorg. Chim. Acta.‚ 278 (2)‚ 170-177 (1998). S8 by molecular oxygen”‚ Inorg. Chim
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green tea reduce the risks of cardiovascular diseases. However‚ the results are inconsistent and the mechanisms remain unclear. In this review article‚ the potential mechanisms will be showed from five aspects: lowering cholesterol level‚ inhibiting oxidation of LDL‚ improving vascular endothelial function‚ decreasing blood pressure and having anti-atherosclerotic effect. In the discussion part‚ the adverse effects of high consumption of green tea will be showed. To sum up‚ there is no conclusive evidences
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A STUDY OF HEAVY METAL POLLUTION SUCH AS Cd (II) IN THE AQUATIC ENVIRONMENT OF MUMBAI BY SPECTROPHOTOMETRIC METHOD A DISSERTATION SUBMITTED TO SVKM’S NMIMS (DEEMED- TO- BE UNIVERSITY) IN PARTIAL FULFILLMENT FOR THE DEGREE OF MASTER OF SCIENCE IN BIOLOGICAL SCIENCES (2010 – 2013) SUBMITTED BY ABHIJITH SHISHIR MANDYA (G.R. NO. 75102100002) Project Mentor Dean‚ School of Science Prof. Dr. (Mrs.) Z.R. Turel Dr. Aparna Khanna
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contents and then centrifuged the test tube 3) Whitish ppt stayed and did not dissolve‚ which is a positive confirmation for Hg2+2‚ therefore it contains Hg2+2. Identifying Ag+: 1) decanted the soln from Hg2+2 into another test tube and added 6M HNO3 until it became acidic by litmus paper test 2) no white ppt formed but soln was acidic‚ which is a negative confirmation because no white ppt was formed‚ therefore no Ag+ was contained The observations I made with the Pb+2 was the yellow ppt formed
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types of valencies namely‚ primary and secondary valencies. Primary valencies are satisfied by negative ions while secondary valencies are satisfied by both negative and neutral ions. (In modern terminology‚ the primary valency corresponds to the oxidation number of the metal ion‚ whereas the secondary valency refers to the coordination number of the metal ion. (ii) A metal ion has a definite number of secondary valencies around the central atom. Also‚ these valencies project in a specific direction
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number of ways. The process depends upon the rocks’ mineralogical composition‚ and the nature of chemical environment surrounding them. Some of the main processes of chemical weathering are: 1. solution‚ 2. hydration and hydrolysis‚ 3. oxidation and reduction‚ 4. carbonation‚ 5. base exchange‚ and 6. formation of colloids. 1. SOLUTION Some rocks contain one or more minerals that are soluble in water to some extent. Rock salt (NaCl)‚ gypsum (CaSO4. 2H2O) and calcite (CaCO3) As it
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a positive charge. Oxidation number: number of electrons an atom gains‚ loses‚ or shares when it forms a chemical bond. -remember this pattern: +1‚ +2‚ +3‚ +/-4‚ -3‚ -2‚ -1‚ 0 -example: -sodium (Na): -valence electrons = 1 -oxidation number = +1 -resulting ion = Na+1 Rule of oxidation numbers: the sum of all the oxidation numbers of all atoms in a molecule must equal zero‚ indications that the molecule is neutral. SHORTCUT: flip the oxidation numbers to get the final
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