"Percent copper in a penny" Essays and Research Papers

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    oxygen Appearance of steel wool after 20 minutes _____________________________________ Part II: Decomposition of hydrogen peroxide Appearance of potato and hydrogen peroxide combination ________________________ Day 2 Materials: Part III: a penny dated after 1983 metal file or coarse sandpaper vinegar (CH3COOH) Part IV: baking soda (NaHCO3) vinegar (CH3COOH) cup spoon Procedures: Part III: Reaction between zinc and acetic acid 1. Use a file or sandpaper to completely remove the

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    Cleaning Coins

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    For gold coins‚ soaking in very hot soapy water works the best. For old pennies‚ soak the coin in vinegar for at least 24 hours. For bronze coins — usually ancient coins — soak in distilled water (the minerals in tap water can further taint the coin’s surface if soaking for a long time) or olive oil — olive oil is a very gentle way to clean coins‚ but you may need to soak them for several weeks. Silver‚ copper‚ and nickel-clad coins can be soaked in distilled water or‚ to remove tough

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    same___________________ Part II: Decomposition of hydrogen peroxide Appearance of potato and hydrogen peroxide combination ___________alot of foam came out of the potato because of the Hydrogen peroxide_____________ Day 2 Materials: Part III: a penny dated after 1983 metal file or coarse sandpaper (if

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    Ten Sacred Objects

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    Ten Sacred Objects Michelle Sanders Hum/105 August 1‚ 2013 Greg Jorge Ten Sacred Objects 1.) Fish are a symbol of luck in China. In fact‚ it’s traditional to serve fish at New Year’s dinner. The word fish‚ “Yu”‚ sounds like the word “wish” or “abundance” in Cantonese and Mandarin. 2.) Cows have long been sacred in India. They are protected animals under the Hindu religion. Hindus do not eat beef. In fact‚ most rural Indian families have at least one dairy cow which is

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    simple as a penny. As a child she would find a penny and then re-hide it in a crack in the cement or the roots of a tree‚ and then went home taking joy hoping that someone would stumble upon it and be just as delighted as she was. A penny has almost no value yet if we can find value in something so small we will be rich indeed "But if you cultivate a healthy poverty and simplicity‚ so that finding a penny will literally make your day‚ then‚ since the world is in fact planted in pennies‚ you have with

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    Research Paper

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    base my experiment on four different types of metals and four different liquids. I will be using a penny‚ nail‚ paper clip and a needle as my four metals. My four liquids will be vinegar‚ beach‚ lemon water and salt water. To get started‚ the metal contents should be established. Today’s pennies are mostly made of zinc with a thin layer of copper overcoating. A nail is a form of carbon steel or black iron. Paper clips are made from a low grade

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    vegetables) using two strips of metal. The most readily available combination is copper and zinc. The zinc piece can be taken from the casing of an old carbon "D" cell (battery); some zinc coated nails may work as well. The copper can be a coin containing a high amount of copper. (Note: some recent copper coins‚ including the newer U.S. pennies‚ contain low amounts of copper mixed with zinc. If in doubt‚ use a pure copper strip.) They are stuck into the lemon‚ and wires are attached to each one. The

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    Acid Rain

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    controlled experiment is based on the Statue of Liberty. It is made of copper so I am using pennies in my experiment. (nps.gov. n.d.) My observation is that acid rain corrodes metals. My question: does acid rain corrode metal? My hypothesis is the obvious‚ yes metal structures are in danger of being corroded because of acid rain. That is also my prediction. The experiment will take place over a one month period. I will take two pennies (minted before 1983) and place each one in their own glass. (U

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    and her brother‚ Neeley‚ like other Brooklyn kids‚ collected rags‚ paper‚ metal‚ rubber‚ and other junk and hoarded it in locked cellar bins or in boxes hidden under the bed…Paper wasn’t worth much. They got only a penny for ten pounds. Rags brought two cents a pound and iron‚ four. Copper was good—ten cents a pound” (Smith 7). This

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    site due to this they lost 150‚000 bricks.Because of the wrecks they had to come up with something different so they used boats with special built shallow draft boats.The whole lighthouse took 1‚250‚000 bricks. How does hot sauce clean a penny? When pennies are exposed to air over long periods of time a reaction occurs

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