The lab “Aluminum Atoms” was designed to determine whether heavy-duty or house hold aluminum foil was the thicker than the other and to show the different atomic calculations of each type of foil. It was learned that heavy-duty foil is thicker than the household aluminum foil. An atom is the basic unit of a chemical element. Avogardo’s number‚ 6.02 x 1023‚ is the number of particles found in one mole of a substance. The molar mass is the weight of one mole (or 6.02 x 1023 molecules) of any chemical
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Purpose: The purpose of this lab was to determine the freezing point of pure water‚ the experimental van’t Hoff factor for a substance and the molar mass of an unknown solution. Reagents: 25mL deionized Water ¼ to ½ inches of rock salt 25mL Sodium Nitrate (NaNO3 ) 25mL unknown solution – handle unknown solution carefully Procedure: For part 1‚ the freezing point of deionized water was determined. An ice bath was prepared by filling a 600mL beaker ¾ full of ice and covered with ¼ to
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Concentration The Problem In many colleges over 8% of the students report problems concentrating on their studies. Most of these students blame outside distractions for their problems. Many research studies manipulating noise levels and distractions have found that such disturbances may increase‚ decrease‚ or not even affect concentration. These researchers have therefore concluded that distracters don’t cause concentration problems directly. It is the way the distracters are interpreted
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Thickness of Aluminum Foil August 21‚ 2014 Purpose: To determine the thickness of aluminum foil through the use of the density formula applied to gathered data. Theory: The thickness of aluminum foil cannot be directly measured. In order to find the thickness‚ many pieces of data must be obtained and used in the density formula. The data that must be obtained is the length‚ width‚ and mass of the aluminum foil. These need to be collected because they will complete the formula: Density = mass /
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Method 1- Titration • For the titration‚ it is necessary to dilute the Sodium Hydroxide so that it is an easier concentration to titrate. Using a 25cm3 pipette‚ washed out with some of the NaOH solution‚ transfer 25cm3 of the solution to a 250 cm3 volumetric flask‚ and fill to the line with distilled water. The alkali will now have a concentration of 0.1 mol dm-3. • In the titration‚ the NaOH will be in the burette‚ and will be titrated into HCl in a conical flask: NaOH (aq) + HCl (aq) NaCl
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elements are metals. Of the metals‚ aluminum is the most abundant in the earth’s crust. Aluminum is concentrated in the outer 10 miles (16 km) of the Earth’s crust‚ of which it constitutes about 8% by weight; it is exceeded in amount only by oxygen and silicon.1 This metal can be found in group 13 (formerly group IIIA) in the periodic table‚ known as the boron group elements. It is represented by the chemical symbol Al‚ and has an atomic number of 13. Aluminum‚ also spelt Aluminium‚ comes from
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To What Extent does the Sugar Concentration of Water Affects Its Refractive Index? 1. Introduction 1.1 Background Why do object when placed in a bucket of water bend? This is not magic but it is a property of light known as refraction. The bending of light when it travels from one medium to another is known as refraction. Different mediums have different densities and density is defined as the amount of mass per unit volume. The higher the density‚ the higher is the
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deodorants contain different amounts of aluminum? Thus‚ how can we stay on the safe side and use the least amount of aluminum possible. Why do deodorants with a greater amount of aluminum cause a more serious threat than ones with a smaller amount? Hypotheses The aluminum content in each of the deodorants will vary where the deodorants Axe and Citymen contain more aluminum then Nivea. By using Nivea‚ in the long term a person will be safer due to lower amounts of aluminum being present in their system. Based
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Which bat wooden or aluminum‚ hits a ball the greatest distance? This project was done to see if aluminum bats are really as dangerous as Major League Baseball says they are and why MLB outlawed players from using aluminum bats . If aluminum bats have a greater trampoline effect than wooden bats ‚ then aluminum bats will hit the ball a greater distance. This hypothesis is true based on the information gathered‚ from the aluminum bats. The first‚ second‚ and third aluminum bats ball averages were
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Horizontal hydrofracking is a means of tapping shale deposits containing natural gas that were previously inaccessible by conventional drilling. Vertical hydrofracking is used to extend the life of an existing well once its productivity starts to run out‚ sort of a last resort. Horizontal fracking differs in that it uses a mixture of 596 chemicals‚ many of them proprietary‚ and millions of gallons of water per frack. This water then becomes contaminated and must be cleaned and disposed of. What is
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