chromium ore answer

  • Natural Sources of Chromium

     · Chromium, when administered in the right dose, helps build muscles. It is a trace metal. A trace metal is available in extremely small quantities, which are present in animal and plant tissues. Other trace metals include iron, zinc, copper, nickel, cobalt, vanadium,...

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  • Chromium (Cr) Toxicity: What Is Chromium | ATSDR ...

     · Chromium in chromite ore is in the trivalent state; industrial processes also produce the elemental metal and hexavalent chromium. The health effects of chromium are primarily related to the valence state of the metal at the time of exposure. Trivalent (Cr[III]) and hexavalent (Cr[VI]) compounds are thought to be the most biologically significant.

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  • What is chrome used for? | Yahoo Answers

     · Best Answer: *Chromium is a chemical element which has the symbol Cr and atomic number 24. It is a steely-gray, lustrous, hard metal that takes a high polish and has a high melting point. It is also odorless, tasteless, and malleable. *Chromium was regarded with great interest due to …

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  • Chapter 7 Chemistry Test Flashcards | Quizlet

    Start studying Chapter 7 Chemistry Test. Learn vocabulary, terms, and more with flashcards, games, and other study tools. Search. ... Chromium, a transition metal used in chrome plating, forms both the Cr2+ and ... the correct formula and justify your answer. b. Na3SO4 Na2SO4; two Na ions bond to SO4.

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  • Chromium - Wikipedia

    The two main products of chromium ore refining are ferrochromium and metallic chromium. For those products the ore smelter process differs considerably. For the production of ferrochromium, the chromite ore (FeCr 2 O 4) is reduced in large scale in electric arc furnace or in smaller smelters with either aluminium or silicon in an aluminothermic ...

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  • 6. Which of the following is likely to be found in placer ...

     · 6. Which of the following is likely to be found in placer deposits? A. Gold B. Chromium C. Copper D. Iron ore

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    A Trip around the World through Exports . Activity by . ... (Answers will vary, but they may include coffee and Brazil, Saudi Arabia and oil, sausages and Germany, clocks and watches and Switzerland, pasta and ... Chromium ore Toys Petroleum oil Nuclear …

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  • major chemistry help needed!!!! moles and stoichiometry ...

     · Major chemistry help needed!!!! moles and stoichiometry? Chromite (FeCr2O4) is the most important commercial ore of chromium. One of the steps in the process used to extract chromium from the ore is the reaction of chromite with coke (carbon) to produce ferrochrome (FeCr2).

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  • How many moles of chromium are in 82.0 g of Cr ore that is ...

     · How many moles of chromium are in 82.0 g of Cr ore that is 74.0% pure? Follow . 1 answer 1. ... I think this answer violates the Community Guidelines. Chat or rant, adult content, ... How many moles of chromium are in 50.4 g of Cr ore that is 77.2% pure?

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  • How many moles of chromium are in 82.0 g of Cr ore that is ...

     · How many moles of chromium are in 82.0 g of Cr ore that is 74.0% pure? Follow . 1 answer 1. ... I think this answer violates the Community Guidelines. Chat or rant, adult content, ... How many moles of chromium are in 50.4 g of Cr ore that is 77.2% pure?

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  • How is platinum ore formed? | Yahoo Answers

     · Best Answer: The most commonly used scheme is the genetic classification scheme. These deposits include: Orthomagmatic deposits are those that form from primary magmatic processes (i.e. magmas). They are hosted in the igneous rocks in which they have formed. Most of the world's nickel, chromium and platinum ...

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  • Natural Sources of Chromium

     · Chromium, when administered in the right dose, helps build muscles. It is a trace metal. A trace metal is available in extremely small quantities, which are present in animal and plant tissues. Other trace metals include iron, zinc, copper, nickel, cobalt, vanadium,...

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  • HEXAVALENT CHROMIUM EMPLOYEE TRAINING …

    HEXAVALENT CHROMIUM EMPLOYEE TRAINING ... REVIEW QUESTIONS AND ANSWERS: Questions may be copied and given to participants to document ... • Particles may also be released during smelting of ferro-chromium ore and trace amounts may also be found in portland cement.

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  • Chromium - Element information, properties and uses ...

    Chromium is found mainly in chromite. This ore is found in many places including South Africa, India, Kazakhstan and Turkey. Chromium metal is usually produced by reducing chromite with carbon in an electric-arc furnace, or reducing chromium(III) oxide with aluminium or silicon.

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  • Natural Sources of Chromium

     · Chromium, when administered in the right dose, helps build muscles. It is a trace metal. A trace metal is available in extremely small quantities, which are present in animal and plant tissues. Other trace metals include iron, zinc, copper, nickel, cobalt, vanadium,...

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  • Alnico or chromel Crossword Clue, Crossword Solver ...

    The Crossword Solver found 21 answers to the Alnico or chromel crossword clue. The Crossword Solver finds answers to American-style crosswords, British-style crosswords, general knowledge crosswords and cryptic crossword puzzles. Enter the answer length or the answer pattern to get better results. Click the answer to find similar crossword clues.

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  • Solved: The Chromium Content Of An Ore Sample Was Determin ...

    The chromium content of an ore sample was determined by two methods. Which of the following cases describes how one would determine if the two analytical techniques yield results that differ at the 99% confidence interval?

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  • What is the percent Cr, by mass, in the steel sample ...

     · A stainless steel alloy is to be analyzed for its chromium content. A 3.40g sample of the steel is used to produce 250.0 mL of a solution containing Cr2O72−. A 10. mL portion of this solution is added to BaCl2(aq). When the pH of the solution is properly adjusted, 0.145 g BaCrO4(s) precipitates. Please Help, i dont understand this

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  • Chromium (Cr) Toxicity: Clinical Assessment - History ...

     · Reports on adverse effects from low-level environmental exposures in human populations are limited. Hudson County, NJ, was a major center for the processing of chromium ore. A study using immune-function assay described reduced production of cytokines in individuals who were exposed to chromate [Snyder, Udasin et al. 1996]. Long-term studies in ...

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  • Chromium — Market Report — Roskill

    Roskill’s report includes quarterly chromium updates, which keeps you informed of industry news and trends, and allows us to provide you with up-to-date supply, demand and price forecasts on a quarterly basis. Roskill experts will answer your questions… Which companies are the major producers of chrome ore, ferrochrome and niche products?

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  • What is chrome ore used for - Answers

    Chrome ore is one of the most valuable metal ore in the world. Chrome ore mining and beneficiation is an important industry in some countries such like Pakistan (Muslim Bagh) South Africa, and so ...

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  • A Trip around the World through Exports

    A Trip around the World through Exports . Activity by . ... (Answers will vary, but they may include coffee and Brazil, Saudi Arabia and oil, sausages and Germany, clocks and watches and Switzerland, pasta and ... Chromium ore Toys Petroleum oil Nuclear …

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  • What is Chrome ore - Answers

    Chrome ore is usually for production of ferrochromium and chrome, which is widely used in metallurgical industry, refractory matter, chemical industry and so on. Chrome ore is one of the most ...

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  • AP Chemistry Help--Stoichiometry? | Yahoo Answers

     · (Type your answer using the format CH4 for CH4.) If a 22.5 g sample of copper is used, determine the theoretical yield of silver. g If 59.4 g silver is actually recovered from the reaction, determine the percent yield of the reaction. % Chromite (FeCr2O4) is the most important commercial ore of chromium.

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  • Is chromite magnetic - Answers

    Chromium is mined as chromite (FeCr2O4) ore. About two-fifths of the chromite ores and concentrates in the world are produced in South Africa, while Kazakhstan, India, Russia, and Turkey are also ...

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  • What is the ore of chromium - Answers

    Chromium was discovered in a red lead ore from Siberia by Louis Nicolas Vauquelin, however, he was in Normandy, France at the time. The term birthplace is vague.

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  • Chromium (Cr) Toxicity: What Is Chromium | ATSDR ...

     · Chromium in chromite ore is in the trivalent state; industrial processes also produce the elemental metal and hexavalent chromium. The health effects of chromium are primarily related to the valence state of the metal at the time of exposure. Trivalent (Cr[III]) and hexavalent (Cr[VI]) compounds are thought to be the most biologically significant.

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