EXTRACTION OF METALS SUMMARY Most metals exist in compounds in rocks in the Earth’s crust. Many of these ores contain oxides or sulphides of the metals. The compounds need to be reduced to produce the metals as elements. Metals are very useful to us because of their special properties. Reduction means removal of oxygen or gain of electrons. Carbon is a good chemical reducing agent because it readily combines with oxygen‚ but it is only useful for the metals below it in the Reactivity
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Study of Gold metal Date: 14/01/2013 Submitted to: Dr Sami Habib Submitted by: Jamil Mahfoud (A1010659) I- General introduction about metals: a- Historical background Back to 6000 BC‚ process metallurgy is known as one of the oldest applied sciences. Despite that the form of metals was very basic but it has a big impact on the society because of its wide uses especially as tools for agriculture or hunting and even as artistic styles later on. There are 86 known metals so far that were
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OLAMIJUWON Emmanuel O. (1117172) Compile the demographic profile of your country based on the latest census data including: size of population‚ sex composition‚ age structure‚ racial composition‚ educational achievement composition‚ employment status BRIEF INTRODUCTION: Nigeria‚ located in West Africa‚ Nigeria is the population giant of Africa‚ with more than 140 million people. The terrain changes from the oil-rich Niger Delta in the south to a belt of rain forests inland and to high savannah-covered
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China research – Bullet 5 Demographics Political and legal environment in China make it very volatile for business outside of the country. China is undergoing massive urbanisation with millions (160m) of people moving from rural to urban environments. However the mass industrialisation comes with a lot of pollution costs. The urbanisation is pushing up consumption per person but also increasing income per person. Population in China is suspected to reach 1 billion by 2030. The scale and pace of
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Corrosion of Metals Introduction Have you ever had a bike that went rusty‚ figure 1? If the paint is scratched and the rust allowed to spread‚ it is very difficult to repair the frame so it looks as good as new again. Rusting costs us millions of pounds each year‚ either through replacing things or through trying to prevent it happening in the first place. Figure 1: Bike rusting. In this booklet you learn about rusting and ways of stopping it‚ followed by a look at another metal‚ aluminium that
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------------------------------------------------- “India’s economy would reap a better demographic dividend and would grow faster in the next decade” As compared to China‚ do you believe India will have a bigger advantage? Examine how your company is gearing up to benefit from the economic Boom in both the countries? Definitely‚ I believe that India will have a bigger advantage when compared to china due to a better demographic dividend. China & India are the two largest populations in the world‚ each has
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September 2004 Understanding the Demographic Dividend By John Ross A fresh reason for attending to fertility dynamics has emerged—the “demographic dividend.” As fertility rates fall during the demographic transition‚ if countries act wisely before and during the transition‚ a special window opens up for faster economic growth and human development. WHAT IS THE DEMOGRAPHIC DIVIDEND? Simply stated‚ the demographic dividend occurs when a falling birth rate changes the age distribution‚1 so
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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 is considered a form of brass‚ but it has maintained its name of Muntz metal. [http://www.wisegeek.com/what-is-muntz-metal.htm] (Accessed
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Resources‚ Conservation and Recycling 21 (1997) 145–173 Metals recycling: economic and environmental implications Robert U. Ayres * INSEAD‚ Boule6ard de Constance‚ F-77305‚ Fontainebleau‚ France Received 17 July 1997; accepted 27 July 1997 Abstract We are in a period of economic transition. The ‘cowboy economy’ of the past is obsolescent‚ if not obsolete. Environmental services are no longer free goods‚ and this fact is driving major changes. Recycling is the wave of the (immediate) future
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and delaying tactics. However‚ likelihood of this is fairly low as the Indian market is largeenough to accommodate more players and the incumbents in the Indian gourmet coffee industrywill be minimally affected by Starbucks’ entry.As far as the demographics are concerned‚ the majority of the Indian population is still rural(www.eiu.com) but the urbanisation is occurring at a respectable 2.4 % annually. In spite of this‚ thesheer size of the total Indian population (1.1 billion in
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