Finding the percentage of copper in brass alloy. Introduction This is an investigation to find out how much copper is in a brass alloy. The brass alloy we are experimenting on is called Muntz Metal. Muntz metal is 60% copper‚ 40% zinc and a hint of copper [http://en.wikipedia.org/wiki/Muntz_metal] (accessed 4/10/12). Muntz metal was developed as an alternative to expensive‚ heavy copper. It is comprised of about 60% copper and about 40% zinc‚ with a small amount of iron. The finished product actually
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| |Sodium - 2 mg |Vitamin B6 - 0.075 mg | | | |Copper - 0.049 mg |Vitamin C - 8.4 mg | | | |Zinc - 0.07 mg |Vitamin E - 0.33 mg | | | |Also contains a trace amount of other |Vitamin
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NSS Chemistry Part 3 Metals HKCEE Past Paper Questions – Structural Questions 1. HKCEE 1995 Q1 Rubidium (Rb) and potassium belong to the same group in the Periodic Table. The relative atomic mass of rubidium is larger then that of potassium. (a) Explain whether rubidium is more reactive than potassium. (b) Write a chemical equation for the reaction between rubidium and water. (State symbols should be given.) (c) Suggest how rubidium can be stored safely in the laboratory.
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MATERIALS : METALS AND NON-METALS Y Iron Coal ou are familiar with a number of materials like iron‚ aluminium‚ copper‚ etc. Some materials have been given in Table 4.1. Table 4.1 : Appearance and Hardness of materials Object /Material Appearance Hardness (Shiny/Dull) (Very hard/ Not very hard) similar change if we try to beat a wood log ? Let us find out. Activity 4.1 Take a small iron nail‚ a coal piece‚ a piece of thick aluminium wire and a pencil lead. Beat the iron nail with
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potassium‚ lithium‚ etc. Sodium‚ potassium‚ lithium etc. are very soft metals‚ these can be cut using knife. Strength:- Most of the metals are strong and have high tensile strength. Because of this big structures are made using metals‚ such as copper and iron. State:- Metals are solid at room temperature except mercury. Lusture:- Metals are lustrous i.e. they are shiny in appearance. This is the cause that metals like gold‚ silver and platinum are used to make jewellery. Sound:- Metals produce
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Design Research Question What is the enthalpy change between the reaction of Zinc reducing Copper II ions? Purpose Determine the change in enthalpy for the redox reduction of zinc reducing Copper II ions. Independent Variable Dependent Variable The change in temperature Controlled Variables Materials/ Apparatus * Zinc powder * 2‚ Foam cups * 10 cm3 pipette * stopwatch * 1.00 M Copper II Sulfate * Scale * Scoop * Thermometer * Weighing plastic container
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Well-Plate 1 Tweezers‚ plastic Experiment Bag Oxidation-Reduction Activity Series 1 Copper (II) Sulfate‚ 1 M - 3 mL in Pipet 1 Iron (III) Chloride‚ 2 M - 3 mL in Pipet 1 Iron Metal‚ 2 pc in Bag 2"x 3" Magnesium Metal (ribbon) - 2 Small Pieces in Bag 2"x 3" 1 Magnesium Sulfate‚ 2 M - 3 mL in Pipet 1 Lead metal‚ 4 small pieces in bag 2 x 3” 1 Sodium Sulfate‚ 1 M - 3 mL in Pipet 1 Zinc Metal - 2 Small Pieces in Bag 2"x 3" 1 Zinc Nitrate‚ 2 M - 3 mL in Pipet Procedure 1. Place 10 drops of Sodium sulfate‚
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Professor: José Tudela Martins Students: João Pedro Jesus‚ Maria Kostyunina & Marta Gonçalves Agenda • • • • • • Problem Statement Antamina Project Overview Assumptions Prices Forecast DCF Valuation: 3 Scenarios Options Valuation Real Options Option to Abandon • Re‐valuation according to changes Expropriation Block Funds • Main Conclusions Location of Antamina Problem Statement How much is Antamina worth? Impact of a 5% per year risk of expropriation or a possibility of a two
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electrons that can travel‚ increasing the potential energy‚ which increases the voltage. I will measure the concentration of the solutions before the experiment to ensure that they are the same. Equipment required: * Lead * Zinc * Iron * Silver * Copper * Tin * Aluminum * Magnesium * Silver nitrate solution *
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Essential Trace ElementsAnthony L. JacksonBIO/350October 20‚ 2014Michelle GrayEssential Trace ElementsEveryone has their own beliefs on how the Earth was formed‚ and people can argue about it for hours or even days‚ but there is one thing that everyone can agree on is that all organisms are composed of matter. Matter is anything thing that takes up space. All organisms need some element to make them produce and to live healthy lives. There are two types of elements the essential and trace element
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