Unit Name: Analysis at Work Unit Number: G621 Assignment Title: Finding the Percentage of Copper in a Brass Alloy Assignment: G620 Sample Assignment C Date Set: Due Date: Assessment Objective(s): AO3 Vocational Brief: Brass is an alloy of copper and zinc. This alloy has many uses ranging from coinage to non-ferrous fittings on ships. Many domestic taps use brass where contact with water occurs. You are provided with a sample of brass which is about 150 years old and you are
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TITLE : The copper cycle IN TRODUCTION The purpose of the experiment is to recognize that change of state‚ change in colour‚ formation of a precipitate‚ or the evolution of heat are associated with a chemical change; to study reactions of copper. Copper is an element that can be found in nature in a variety of different compounds. The most common natural ore is the sulphide‚ known as chalcocite‚ Cu2S. This mineral is an important source of copper metal because it is about 80% copper by
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Copper Cycle Summary During the copper cycle lab‚ my partners and I performed a series of reactions on copper powder and observed the changes it underwent. For the first step‚ we mixed nitric acid and copper powder‚ and noticed that a yellowish brown gas emerged‚ along with effervescence. The red solid disappeared and became a blue liquid. We know that we produced copper nitrate‚ nitrate gas‚ and water because the only two blue solutions in “A New Language” are copper sulfate and copper nitrate
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Lithium‚Sodium‚Potassium‚Rubidium‚Caesium and Francium are all part of group 1.They are metals that can be easily cut.After being cut‚it is shiny but it quickly tarnishes due to the fact that the metal reacts quickly with oxygen or water.The shiny surfaces of Sodium quickly tarnishes more quickly than Lithium and Potassium more tarnishes more quickly than Lithium.This shows that the reactivity increases as we move down the group. Figure 1 Elements Melting point Boiling point Thermal
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Light and Dark Minerals Compare and contrast Essay. Have you ever wondered about light and dark minerals? Although they’re different from each other‚ they are alike in many ways. Dark and light minerals do have similarities like the eight elements. These two minerals helped form rocks in today’s society. Dark minerals are different from light minerals because of the colors. These minerals are Pyroxene‚ Amphibole‚ Olivine‚ Calcium Feldspar and Iron. The dark minerals form dark colored rocks
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2. Element X melts in boiling water‚ it fails to react with hydrochloric acid; and 1 cm3 of element X has a mass of 1.8 grams. Is element X a metal or non-metal? Give the reasons for your answer. Element X is most likely a typical non-metal. First of all‚ element X melts in boiling water; non-metals typically have low melting and boiling points. Furthermore‚ element X is unable to react with hydrochloric acid. This greatly indicates that element X is a non-metal as most non-metals fail to
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Copper is a transitional metal with an atomic number of 29. Its atomic mass is 63.546. A pure metal found in nature‚ its compounds are usually found as copper(II) salts. Copper is typically a reddish-brown with a shine or glow to it. When it is exposed to air it darkens to a brown color. If exposed to air and water‚ it becomes a blue-green. Its phase of matter is solid‚ with a melting and boiling point of 1084.62 °C and 2562 °C respectively. Copper is soft and malleable‚ meaning that it is capable
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I think that we should and should not mine minerals.We should because it gives resources.We shouldn’t because we lack trained people and fuel. We can mine and find many resources.For example‚ minerals. The minerals we can find can be worth millions of dollars.We can fine minerals like silver‚gold‚copper‚lead‚tin‚and zinc.We can also use these to create thing not just for money. We can mine and find another resource.This resource is fuel.This is what we use to drive cars.The fuel could also
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DENTAL CEMENTS | BY ROBIN LAMBERT | DENTAL MATERIALS/ ANDREA BEAN | Wednesday‚ February 22‚ 2012 | DENTAL CEMENTS Dental cements have a variety of uses and properties‚ upon which the American Dental Association and International Standards Organization have classified them. Type I cements are considered luting agents‚ which hold a cast restoration (such as a crown‚ bridge or veneer) to a tooth. Type II cements are used to restore teeth. Type III cements--called liners and bases--are placed
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Five forces Analysis of Crown Cork& Seal in 1989 Part1. Competition analysis of metal container industry Bargaining power of suppliers 1. There are only three major aluminum suppliers‚ Alcan Aluminum‚ Alcoa‚ Reynolds Metal. They have obtained strong power by dominating and controlling the primary aluminum and aluminum production market. They are more concentrated than metal container industry. 2. These aluminum producers control huge aluminum resource so that the can manufacturer
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