mouth of the test tube to test for the presence of hydrogen gas. We notice one of the products is lead iodide which is insoluble so it precipitates out and indeed its colour is yellow. 3) Mg + 2 HCl = MgCl2 + H2 3. Electrolysis of water Use a U-tube with electrodes at each end‚ connected to a battery. Fill the U-tube with water. Turning on the battery‚ observe the results at each electrode. Next‚ test for hydrogen and oxygen gas produced at each end of the tube. Electrolysis of water
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with excess phosphorus‚ what mass of tetraphosphorus decoxide (P4O10) would be produced. KClO3 (s) + P4 (s) → P4O10 (s) + KCl (s) Answer: 36.8 g P4O10 Stoichiometry • In the real world‚ reactions do not always have 100% efficiency. • Often‚ use an excess of one of the reactants (usually the cheaper one). • Limiting Reactant – reactant that will be totally consumed. • Excess Reactant – will not be totally consumed; will have left over. • The maximum amount of product (theoretical yield)
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found in your report in point form with appropriate illustrations (excluding the work cited). The poster should be easy to read and professional looking. PART C: DEMONSTRATION TO THE CLASS Choose a recipe to demonstrate to the class that uses your topic as the main ingredient. Your demonstration must be no longer than 15 minutes. Be sure you choose a recipe that fits the time frame for your demonstration. (Submit your chosen recipe to the teacher for approval). • The ingredients
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carbon chains. Give the names and draw the displayed formulae for any two of the branched chain isomers of C4H8Br2. (4) (Total 8 marks) 4. The table below shows the fractions obtained from crude oil. Name of fraction Number of carbon atoms Use Gases 1-4 bottled fuels for camping Petrol (gasoline) 4-12 fuel for cars Naphtha 7-14 11-15 jet fuel Gas oil (diesel) 15-19 central heating fuel Mineral oil 20-30 lubrication Fuel oil 30-40 Wax 41-50 candles Bitumen over
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types of microscopes: Light and Electron Electron Micrographs- shown in colour LIGHT ELECTRON Uses beam of light Magnification = x1500 Resolution = 200 nm Wide range of specimens can be used Samples are fairly quick + easy to prepare Cheaper and safer Limited resolution Limited magnification Transmission Electron Microscope (TEM) Scanning Electron Microscope (SEM) Uses electromagnets to focus beam of electrons Denser parts of specimen absorb more electrons creating contrast
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REPORT ON USES OF DATA BASE IN DIFFERENT SECTORS BY MANAGERS SUBJECT- MANAGEMENT INFORMATION SYSTEM SUBMITTED TO: DR. RICHA MISRA SUBMITTED BY: SHUBHADIP BISWAS ROLL NO.-FT-10-948 SEC-A GDM 10-12 IILM-GSM DATE
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100g for simplicity) 2) Divide all the moles by the smallest number mole to reduce the decimals 3) If not whole numbers yet‚ multiply by some special factors to reduce decimals 1.25 x ¼ = 1 Al2(SO4)3 + 3 Cu : 2:3:1:3 ratio To determine amounts‚ use ratio and plug in numbers correctly Limiting/excess reactants Limiting:Reactants that are not completely used up in a reaction When this reactant is used up‚ the reaction stops Excess
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explain the importance of chemistry in your life and in society. Include the following information: · Describe the scientific method. Explain all the steps involved in this method. · Explain how society applies the scientific method in industry‚ market‚ and academia. · Explain how you may apply the scientific method in your daily life and in your future career Format your paper consistent with APA guidelines. Chemistry is very important in
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2008 APEC Clean Development Conference – The Current Applications and Future Promotion of Green Chemistry for Sustainable Development National Tsing-Hua University‚ Hsinchu‚ Chinese Taipei Dec.15.2008 Green Chemistry for the Improvement of Human Welfare Gwo-Dong Roam ‚ Wan-Yi Wu‚ Chung-Han Chiou‚ Chung-Wen Yen Office of Sustainable Development Environmental Protection Administration‚ Chinese Taipei Tel: 02-23822841; E-mail: gdroam@sun.epa.gov.tw Viewpoints & Experiences: . Roadmap:
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25 mL Overhead projector Pencil lead‚ 0.7 mm Battery lead with alligator clips Petri dish‚ disposable Battery‚ 9-Volt Graduated cylinder‚ 25- mL Safety Precautions: Universal indicator is an alcohol-based solution and is flammable; do not use near an open flame. Wear chemical splash goggles‚ chemical-resistant gloves‚ and a chemical-resistant apron. Please review current Material Safety Data Sheets for addi-tional safety‚ handling‚ and disposal information. Procedure: 1. Place the two
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