• Science Project
    “The Solution to the Dirty Penny Resolution” Hypothesis I know that pennies are made from copper. I think the best solution that will clean the penny will be the salt and vinegar because it contains acid, which is best to use when cleaning copper. Materials * Dish Detergent and water ...
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  • Copper and Zinc Composition Percentages in Pennies
    Copper and Zinc Composition Percentages in Pennies Introduction. The United States Mint sends copper and zinc to a fabricator, which creates coin-sized discs called planchets. The planchets undergo the coining press at the Mint where they are stamped as genuine United States legal tender coins. The...
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  • Demonstrations in Chemistry Classes
    we learned a lot of tricks, but three of them were more interesting and important to me, dry ice and hot water, revealing fingerprints, and shiny pennies. The dry-ice demonstration was the best one that I’ve experimented, and I think it’s a great reaction to be used in multiple situations. First of...
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  • Cleaning Coins
    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...
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  • Research Paper
    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...
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  • Chromotography Lab
    how to use a fire extinguisher. If cloths are on fire: Stop, Drop and Roll!! 10. A bit about the responsibility of students and you in the cleaning of the lab. Keep your work area as nice as it is and pick up after yourself. Clean messy lab benches or counters and sink areas. Please, if...
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  • Essay
    Goods that you can purchase are anything like groceries, gas, clothes or anything else. 3. Babysitting / nanny services, painting services, window cleaning services and carpet installation services. I've also used plumbing services and pest control services. 4. Inflation affects the money's value by...
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  • Solar Cells
    you self right in your own home. It may take a little studying but it will be worth it. you can print up as many Solar Cells as you want for just pennies. ( Cover your entire roof with them. You will have more energy than you will ever need. You can then make money selling electricity back to the electric...
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  • Paper
    working to break down your frying oil all the time. -3- The enemies of frying oil 1. Air 2. Heat 3. Moisture 4. Food particles 5. Trace metals 6. Cleaning agents Simple exposure to air oxidizes frying oil. It is important to keep fryer wells covered when they are idle or off. This is also a good way...
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  • Otec
    the Corners we'll want to be able to find the corners of the opening when we go up on the roof. Drill a hole at each corner and drive a 16-penny nail (20-penny for a shake roof) through each hole. Opening the Roof The thought of cutting a hole in our roof needn't conjure up images of dripping...
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  • Awesome
    funnel for filtering dropper bottle for dispensing liquids a drop at a time spatula for picking up small amounts of solids test tube brush for cleaning test tubes glass stirring rod Your teacher will place about eight pieces of numbered equipment on your table. Your group's task is to identify...
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  • Lean and Six Sigma
    manufacturers are paying more attention to the advice of Poor Richard (a.k.a. Benjamin Franklin): A penny saved is a penny earned. Those intimately involved in the quality improvement movement know those pennies are to be found in reducing rework and scrap and creating a smooth production flow. We can all...
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  • Dfdfd
    1943 copper penny in ... That made the metal composition of the cent 95 percent copper and 5 percent zinc. ... www.usmint.gov/about_the_mint/fun_facts/?action=fun... - Cached - Similar Percent Mass Of Copper In a Penny - Essays - R3Volt - 1:20pmNov 5, 2008 ... Percent Mass of Copper in a Penny Introduction...
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  • Chemistry
    Percent Copper in Post-1982 Pennies Lab Purpose: The purpose of this lab is to determine how much copper is in a post-1982 penny. Background: Before 1982 pennies were made of pure copper. The price of copper went up and the metal value of a penny was worth more. So the U.S began to make pennies out...
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  • Composition of Penny Using Redox Reactions
    Determining the composition of pennies with redox reactions Introduction: The understanding of oxidation and reduction must be clear to carry out this lab. With the understanding of these concepts we can calculate or hypothesize for the properties of each element or compound. Oxidation involves the...
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  • Penny Lab Report
    a Post-1983 Penny Lab Report Background: Through the use of percent composition one can easily find out how much of a certain element is in a compound or an item such as a post-1983 penny. The experiment will be using HCl a strong acid to dissolve all the zinc inside the outer copper shell. The reaction...
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  • Spectrophotometric analysis of a penny
    ANALYSIS OF A PENNY Date Run: 04/03/2012 Date Submitted: 04/15/2012 Grade: _____________________ Objectives: The purpose of this experiment is to use spectrophotometry to determine the percentage of copper in a copper-clad penny, and to determine the thickness of copper layer on the copper-clad penny...
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  • Chemistry- "Pennium" Lab Report
    “pennium” using pennies made before 1982 and pennies made 1982 or after. Hypothesis: The atomic mass of the pennium will be the average of the average masses of a pre-1982 penny and a post 1982 penny. Procedure: 1. Obtain a bag of pennies 2. Determine the total number of pennies in the bag. Record...
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  • Determination of % Composition of Pennies Using Spectroscopy
    Composition of Pennies Using Redox and Double Displacement (Precipitation) Reactions Introduction: Oxidation involves the gain of electrons of hydrogen or the loss of oxygen or decrease in oxidation state. If zinc completely reacts with HCL, then the theoretical yield of copper should be equivalent...
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  • History of a Penny
    The penny has also been known as the cent, the pence, and minor (for minor or insignificant coin). The definition of the penny comes from its derivation. Probably from the word pun in English taken from/for the word pound as used in measuring silver, gold and such like. Therefore, a penny was a specific...
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