Describe how hydrogen bonding occurs between water molecules‚ and relate this and other properties of water‚ to the roles of water in living organisms. Water is a very small molecule‚ consisting of two hydrogen atoms covalently bonded to an oxygen atom. However the electrons shared are not done so equally‚ oxygen is more electronegative and has a firmer hold on the electrons and pulls them slightly towards its nucleus. Due to this‚ the charge across the molecule of water is not equally distributed
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then reduces the amount of oxygen that is in the air around the fire and then smothers it‚ which is helping extinguish the fire (University of Massachusetts Boston). The agent‚ sodium chloride‚ also has the same kind of effect. The heat of the fire tends to cause the dry powder‚ in which this case is sodium chloride‚ to cake and form an exterior crust. This crust then excludes air‚ which ends up in resulting in extinguishment. It also tends to dissipate the heat from the burning metal (University
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Catalysis Lab: Laboratory Write Up Problem/Question: What happens to the amounts of gas produced in a catalyzed reaction of Hydrogen Peroxide when the catalyst is mixed with an acid? Theory/Hypothesis: In this experiment the researcher and their team will be performing tests on a catalyst (proteins found in potato) to see what will happen when the catalyst in a Hydrogen Peroxide reaction is treated with an acid before the reaction occurs. The researcher hypothesizes that the after treating the
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Remember that most bases do not dissolve in water. But if a base can dissolve in water‚ it is also called an alkali. Reactive metals Acids will react with reactive metals‚ such as magnesium and zinc‚ to make a salt and hydrogen: • acid + metal → salt + hydrogen The hydrogen causes bubbling during the reaction‚ and can be detected using a lighted
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hydrocarbon stream during hydrotreating. Hydrotreaters may be designated to continuously process one particular hydrocarbon feedstock‚ or may alternate processing of different feed streams.In other words hydrotreating is a refinery process in which hydrogen gas is mixed withthe
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EDTA. METHOD The following apparatus was collected: 50cmᶟ burette ●Glass stirring rod 20cmᶟ pipette ●Hydrated nickel(II) sulphate (NiSO₄.6H₂O) 100cmᶟ standard flask ●Standardised 0.10moll⁻¹ EDTA solution 250cmᶟ conical flask ●1 moll⁻¹ ammonium chloride Weighing bottle ●Murexide indicator Balance (accurate to 0.01g) ●0.88 aqueous ammonia 100cmᶟ beakers ●Deionised water 25cmᶟ measuring cylinder Wash bottle Pipette filler White tile Filter funnel Approximately 2.6g of hydrated nickel(II)
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Grades K-5 Pencil Electrolysis Introduction: The process by which we separate the elements hydrogen and oxygen from water is called electrolysis. The word "lysis" means to dissolve or break apart‚ so the word "electrolysis" literally means to break something apart (in this case water) using electricity. It is difficult to break up water into it’s elements lots of energy is needed to do that. Through a chemical means though‚ we can separate the compound of water into the elements that combine to
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From the experiment‚ it was determined that Sodium chloride had a crystalline structure‚ even after being broken into smaller pieces with a hammer. Even though there was two different types of Sodium chloride‚ coarse and fine‚ they still had a symmetrical‚ three-dimensional shape. All ionic compounds have this structure. It was also found that Sodium chloride had a high melting point and sugar had a low melting point. This is because Sodium chloride is ionic and the bonds holding it together take much
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important compounds for living things. In the water molecule (H2O)‚ the hydrogen and oxygen atoms bond so that the electrical charge is unevenly distributed. The area of the molecule containing oxygen has a slightly negative charge‚ and the areas containing hydrogen have slightly positive charges. Polar Compound: a compound with one side having a negative charge and the other side a positive charge Hydrogen bonds form between water molecules. • Six Unique Properties of Water 1.
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moles of carbon dioxide are produced when 10.0 moles of propane are burned in excess oxygen on a gas grill? C3H8 + 5O2 → 3CO2 + 4H2O 4. mole-mass problem: Water decomposes to produce hydrogen gas and oxygen gas. How many grams of water would be required to produce 10.0 moles of hydrogen gas? 2H2O → 2H2 + O2 MMH2O = 18.015 g/mol 5. mass-mole problem: If 25.0 grams of carbon dioxide are used in photosynthesis how many moles of glucose (C6H12O6) could be Produced according
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