Purpose: In this lab‚ we will heat up a metal rod and measure how much it expands. We will calculate its Coefficient of Linear Expansion‚ α‚ and prove the formula for thermal expansion‚ ΔL = αLiΔT. Also‚ we heat up a known volume of methyl alcohol and calculate its Coefficient of Volume Expansion‚ β‚ and prove the formula for volume expansion of a liquid ΔV = βViΔT. Equipment: Hollow Metal Rods of different metals‚ Steam Generator‚ Stand‚ Burner‚ Flexible Hoses‚ Motion Amplifier‚ Micrometer
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Fathi Habashi Montana School of Kinetics of Corrosion of Metals Mines Butte For better understanding of corrosion processes‚ it is essential a t first to consider the simple cases of corrosion when no insoluble products‚ scales or films are formed. Once the mechanism of these processes is well established‚ it may be possible to understand corrosion processes in general. Corrosion processes in this category (no insoluble end products are formed) can he divided into two broad
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reaction occurs on the inner surface of the catalyst. Another way ethylene is produced . . . • Steam (thermal) cracking: ethane is mixed with steam and are pumped into a steam cracker at very high temperatures (750– 900oC) and passed through hot metal coils. The heat from the coils breaks the bonds to change the ethane‚ or the larger hydrocarbons to ethylene. C2H6 ( C2H4 + H2 .3 Identify that ethylene‚ because of the high reactivity of its double bond is readily transformed into many useful
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Cobalt Wedding Bands Review Cobalt wedding bands are crafted having a super strong metal that mixes an incredibly higher level of sturdiness using the vibrant reflective appearance of white gold or platinum. Using the many pros cobalt engagement rings have to give you‚ cobalt rings might even at some point exceed tungsten and titanium wedding rings. To discover if this sounds like the best metal for the wedding ring‚ and also to begin to see the benefits and drawbacks of cobalt plus how cobalt
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Lemon Battery creating a battery from a lemon is a common project in many science text books. Successfully creating one of these devices is not easy. Batteries consist of two different metals suspended in an acidic solution. Copper and Zinc work well as the metals and the citric acid content of a lemon will provide the acidic solution. Batteries like this will not be able to run a motor or energize most light bulbs. It is possible to produce a dim glow from an LED. The picture at the top
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Silver can be consider as one of the most all-around metals reachable. Indeed silver is a white‚ shiny and soft metal which is often found in its natural form as a mixture with other minerals and metals. Thanks to its properties‚ silver can be consider as a multi-function produce because it can be used in the industrial sector and also as an asset. Indeed‚ silver has a monetary value when paper money is no longer of value. For example‚ in period of inflation or deflation‚ the value of silver can
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gas. ____ 3. a depiction of valence electrons around the symbol of an element ____ 4. an anion of chlorine or other halogen ____ 5. the force of attraction binding oppositely charged ions together ____ 6. the attraction of valence electrons for metal ions ____ 7. the number of ions of opposite charge surrounding each ion in a crystal Multiple Choice Identify the letter of the choice that best completes the statement or answers the question. ____ 8. How many valence electrons are in an atom of
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Failure Due to Aging 2. The main causes for the structural failure of an aircraft due to aging are briefly discussed as following. (a) Metallic Corrosion. The deterioration of the surface of a metal due to a chemical reaction is called metallic corrosion. This occurs because metals come in contact with electrolyte mostly contaminated water. As it arises‚ it may go undetected and result in loss of integrity of metallic structures. Since metallic corrosion is directly related to structural
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compound solution. Two Real World Applications for the Technique One real world use for recrystallization is in the creation of aspirin‚ making the substance pure and safe to be ingested. Another use of recrystallization is in metal‚ where old‚ stressed metal can be purified into a new‚ stress-free surface. References http://chemistry.about.com/od/chemistryhowtoguide/ss/recrystallize.htm http://designerdrugs.com/pte/12.162.180.114/dcd/chemistry/equipment/recrystallization.html http://www
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this element I thought it was some type of gas but it can turn it to a liquid at a certain type of liquid. But is actually a very shiny type of metal. Rubidium was discovered by Kirchoff and Bunsen in 1861 through the use of a spectroscope. Rubidium metal can be made by minimizing rubidium chloride with calcium with other substances. The cost of this metal in small quantities is approximately 25 U.S. dollars a gram. This element is obtained in the earths crust which is very useful to people. It is
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