Chemistry Internal Assessment: Determining the Enthalpy Change of a Displacement Reaction AIM: To determine the enthalpy change for the reaction between copper(II) sulfate and zinc. BACKGROUND THEORY: Bond breaking is endothermic while bond forming is exothermic. The reaction between copper(ll) sulfate and zinc is exothermic as the energy required to form the bonds of the products is greater than the energy required to break the bonds of the reactants. In an exothermic reaction‚ heat is given
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of the five most commonly consumed food vehicles as reported by the National Food Consumption Survey. The National Food Consumption Survey reported that for South African children as a whole‚ the average dietary intake of energy‚ calcium‚ iron‚ zinc‚ selenium‚ vitamin A‚ vitamin D‚ vitamin C‚ vitamin E‚ riboflavin‚ niacin‚ and vitamin B6 was less than 67% of the Recommended Dietary Allowances (RDA)‚ and in many cases below 50% of the Recommended Dietary
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a prototype nanometer-scale generator that produces continuous direct-current electricity by harvesting mechanical energy from such environmental sources as ultrasonic waves‚ mechanical vibration or blood flow. Based on arrays of vertically-aligned zinc oxide nanowires that move inside a novel “zig-zag” plate electrode‚ the nanogenerators could provide a new way to power nanoscale devices without batteries or other external power sources. The Nanogenerator is constructed with an electrode
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Evaluation of Mexican Diet 10-01-12 Evaluation of Mexican Diet Abstract: The report provides an in depth analysis on the fusion of Mayan‚ Aztec‚ Spanish and French culture which have shaped modern Mexican cuisine. The report throws light on the environmental factors which helped shape traditional Mexican diet and also provides information on the myriad of cultural influences which shaped modern Mexican cuisine. Moreover‚ the
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NANO ELECTRIC GENERATOR PAPER PRESENTATION SUBMITTED BY‚ M.ANANTHA GANESH M.KARTHIKEYAN 3rd YEAR EEE 3rd YEAR EEE (ananthganesh0@gmail.com) (karthikpandiyan13@gmail.com) (Contact No-8870804996) Department of Electrical and Electronics Engineering FRANCIS XAVIER ENGINEERING COLLEGE TIRUNELVELI-627001 ABSTRACT: Power‚ more specifically electric power is very
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30 Best Foods for Pretty Skin: AVOCADOS: Avocados contain a large amount of vitamin E‚ which is a strong antioxidant that prevents aging. I take my avocados‚ mash them up with lemons‚ pepper‚ add a dash of salt and then dip some carrots in. Healthy guacamole best guacamole: You can also use avocado as a mask which is totally fun and leaves your skin oh-so-soft. GREEN JUICE: They’re super anti-inflammatory‚ have a ton of vitamins‚ help tremendously with digestion‚ and lower the overall acidity
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Copper Cycle Summary During the copper cycle lab‚ my partners and I performed a series of reactions on copper powder and observed the changes it underwent. For the first step‚ we mixed nitric acid and copper powder‚ and noticed that a yellowish brown gas emerged‚ along with effervescence. The red solid disappeared and became a blue liquid. We know that we produced copper nitrate‚ nitrate gas‚ and water because the only two blue solutions in “A New Language” are copper sulfate and copper nitrate
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1. What occurs during the operation of a voltaic cell based on the following reaction? Ni (s) +Pb2+(aq) → Ni2+(aq) +Pb(s) External circuit Ion movement in solution A. electrons move from Ni to Pb Pb2+(aq) move away from Pb(s) B. electrons move from Ni to Pb Pb2+(aq) move toward Pb(s) C. electrons move from Pb to Ni Ni2+(aq) move away from Ni(s) D. electrons move from Pb to Ni Ni2+(aq) move toward Ni(s) (2) 2. Which processes occur during the electrolysis of molten sodium chloride? I.
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may increase the actual mass of water in each trial. In the density part‚ the mass and density of zinc electrode was measured and calculated to determine the accuracy of the measurement. The result shows that the densities of zinc electrode in two trials are 6.2±1.6 g/cm3 and 9.4±3.8 g/cm3 (The average density is 7.8±3.8 g/cm3)‚ which is not quite accurate‚ compared to the standard of solid zinc density1 (7.14 g/cm3)1. The random error may result from the reading of volume of water in graduated
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| | Breath | | | No Reaction | | Other Observations: 1B: HCL & Zinc: When this mixture was capped with rubber stopper and a pipet filled with water‚ I saw gas bubbles forming slowly that displaced the water out of the pipet and forced the gas in. I then learned this gas was the Hydrogen that I was supposed to create.
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