indicates oxidation. A decrease in the oxidation number of an atom indicates reduction. For example: 2AgNO3 + Cu Cu(NO3)2 + 2Ag In this equation‚ on the left side of the equation the Ag has an oxidation number of silver is +1 and on the other side the Ag oxidation number is 0. Since the silver ions decrease in oxidation number‚ reduction is occurring. Similarly on the left hand of the equation the Cu has an oxidation number of 0 and on the side it has an oxidation number of +2. Since the copper ions increase
Free Oxidizing agent Electrochemistry Hydrogen
Credit unions: a revolution– importance and impact Although credit unions do not advertise much‚ and you have to become a member to use their products and services‚ they are growing so fast that their presence is everywhere. Today‚ Credit Unions are one of the most important organizations that humans being have ever created to survive from their financial problems. They target both young and old people‚ civil and military‚ men and women‚ and handicapped. Operating solely to meet the needs of their
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two cations F. A1. Cobalt nitrate with Sodium phosphate. CO(NO3)2+6 H2O+Na3PO4+12 H2O Na3+PO2Co(NO3)2+18 H2OD5. Ba(N03)2 - NaHC03 A7. Cobalt nitrate with sodium hydroxide Co(N03)2 - 6 H20 – NaOH B6. Copper nitrate with sodium carbonate Cu(N03)2 - 3 H20 - Na2C03 C1. Iron nitrate with sodium phosphate Fe(N03)3 - 9 H20 - Na3P04 - 12 H20 C2. Iron nitrate with sodium iodide Fe(N03)3 - 9 H20 – Nal C6. Iron nitrate with sodium carbonate
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Cold H2O Hot H2O Litmus Test Dilute HCl Dilute NaOH Mg silver none none none none basic Bubbled none Cu copper none Color change none none none none none Zn silver none none none none none bubbled none MgO white none none dissolve separates basic mixes milky CuCO3 green none black dissolve separates acidic mixes blue Cu(NO3)2 blue none melt dissolve dissolve acidic Mix/green none NaCl white none Sizzle dissolve popping none
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2.3.3 Effects of heavy metals on plants Plants are sensitive for both‚ deficient and excess availability of some of the heavy metal ions. In which some of them at low concentration are compulsory micronutrients‚ while the same at higher concentrations such as Cd‚ Hg‚ As are intensely toxic to the metabolic activities of the plants (Reeves and Baker‚ 2000; Fernandes and Henriques‚ 1991). Agricultural soil is contaminated by heavy metals‚ has become a critical environmental concern due to their potential
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Xenotransplantation Currently‚ there are 100‚000 people living today because of successful human organ transplants. There are also more than 40‚000 Americans waiting for human organs‚ one third will die before they can receive organs. (http://www.columbia.edu/cu/21stC/issue-1.2/Xeno.htm) Scientists are trying to create a new way of fixing this problem; this is what they call xenotransplantation. This is when instead of using human organs‚ animal organs are used. There are many pros and cons to this new idea
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SCIENCE (GOVERNMENTAL MODEL QUESTION PAPER) Time Allowed :2.30 Hours] [ Maximum Marks : 75 Instruction: Check the question paper for fairness of printing. If there is any lack of fairness‚ inform the Hall Supervisor immediately. Note :This question paper contains three Sections. SECTION -I (Marks: 15) Note : i) Answer all the 15 questions. ii) Choose the correct answer from the four alternatives given in the brackets. 15 x 115 1. Theory of natural selection was proposed by (Charles Darwin
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Colosul din Rhodos Colosul din Rhodos este titlul unui desen din perioada in care tarile europene se bateau pentru cucerirea Africii. Acesta il ilustreaza pe colinistul britanic Cecil Rhodes ca un gigant deasupra Africii. Desenul a fost realizat de Edward Linely Sambourne si a aparut pentru prima oara in revista „Punch” in anul 1892‚ fiind la vremea aceea retiparita in mai multe exemplare‚ de atunci devenind o ilustratie frecventa in textele istorice. Desenul a fost publicat pe data de 10 decembrie
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4.35x 1024 16. Find the molar masses of the following substances: a. sodium sulfate (Na2SO4) 142.04 g/mol b. dinitrogen tetroxide (N2O4). 92.011 g/mol 17. Suppose that a pure copper coin has a mass of 3.22 g. How many moles of copper (Cu) are in the coin? 3.22 g /63.55 =
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11/26/2012 Presented by‚ Alvin Lee (1155004095) Carlson Man (1009606213) Kit Cheung (1155004099) Macy Law (1155003775) | | Bicycle Rental Service Bicycle Rental Service ELTU 3110 M | CAMPUS IMPROVEMENT FUND PROPOSAL | ELTU 3110 M | CAMPUS IMPROVEMENT FUND PROPOSAL | Executive summary This year‚ the 334 curriculum has started. Together with the AL entrants‚ the total number of CUHK students has dramatically increased. This causes the problem
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