I am going to talk about how gold is made. I also noticed some physical and chemical changes happening in the video. My first Physical change I saw was when they drill in a certain spot‚ on the rock then they can put the pieces back together and pretend it did not happen because the molecules have not changed in the object‚ you are just breaking them into smaller pieces. So that is why it is a physical change. A chemical change I saw is when there is gold mixed with other materials like silver and
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A chemical bond is an attraction between atoms that allows the formation of chemical substances that contain two or more atoms. The bond is caused by the electromagnetic force attraction between opposite charges‚ either between electrons and nuclei‚ or as the result of a dipole attraction. The strength of chemical bonds varies considerably; there are "strong bonds" such as covalent or ionic bonds and "weak bonds" such as dipole-dipole interactions‚ the London dispersion force and hydrogen bonding
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The Vietnam War -A History project- Nadine Gan‚ Grade 9 Part One. The Overview History ~ French Indochina ~ Vietnamisation ~ Epilogue Vietnam was a part of the French colony‚ Indo-‐China. Then at September 1940‚ the Japanese decided to invade Vietnam to prevent China from sending supplies through French Indo-‐China. Having invaded by
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Chemical Description Chemical Description Chemical #1 Seashell Calcium Carbonate - CaO3 Density | * 2.71 g/cm3 (calcite) * 2.83 g/cm3 (aragonite) | Exact mass | * 100.0869 g/mol | Molecular Formula | * CaO3 | Melting point | * 825 °C (calcite) * 1339 °C (aragonite) | Boiling point | * Decomposes | Acidity | * 9.0 | Flash point | * Non flammable | Crystal structure | * Trigonal | Other names | * Limestone‚ Marble‚ Chalk‚ Calcite and
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CHEMICAL EQUILIBRIUM Reversible reactions and dynamic equilibrium Ammonia (NH3) is an important industrial chemical that is used in the manufacture of fertilisers. It is manufactured by reacting hydrogen with nitrogen. The reaction is said to be reversible and the conversion of reactants to products is never complete. N2 + 3H2 2NH3 A reversible reaction is a reaction which can take place in either direction When the concentrations of the reactants and product have become constant‚ a
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* There where many affects that impacted Australia on the Vietnam war ranging from the veterans psychologically and physically‚ their families whether it’s the loss of their son and husband or the damage inflicted on them psychologically and physically taking care of them for the rest of their lives or/until they are able to sustain by themselves. The biggest impact of the war was on the vetrans themselves. The things they seen and had to do some without a true explanation drove them insane with
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Gulf Oil Corporation in 1984. This merger was the largest merger till that time in the history of the United States and it doubled the oil and gas reserves of the company. Chevron merged with Texaco in 2001 & formed a new company named ChevronTexaco. Texaco was one of the branches of Chevron family. It was formed in 1901 in Beaumont‚ Texas. To convey a unified presence in the world‚ it was again renamed to Chevron in 2005. Chevron strengthened its position by acquiring Unocal Corporation in 2005.
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CASE STUDY 1: ZYCHOL CHEMICALS CORPORATION I. Problem(s): With all of the information gathered‚ has productivity increased at all? Should the accounting practices be further investigated? II. When I started the single-factor productivity analysis it looked as if productivity were headed in the right direction ’’ up. Because the outcomes of both the units per RMU and units per labor hours had an increase‚ 3.59% and 4.79% respectively. Even with the increase in cost per barrel from
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Chemical Equation Chemical Reaction: C10H8+ 12 O2 → CO2 + 4H2 O (Naphthalene) Combustion Introduction of the Product: Naphthalene is an organic compound with formula C10H8. It is the simplest polycyclic aromatic hydrocarbon‚ and is a white crystalline solid with a characteristic odor that is detectable at concentrations as low as 0.08 ppm by mass. As an aromatic hydrocarbon‚ naphthalene’s structure consists of a fused pair of benzene rings. It is best known as the
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Teletech Corporation Background of the case Victor Yoarian‚ a reclusive billionaire had acquired a 10 percent stake of a telecommunications company named Teletech Corporation and has demnded two seats on the firm’s board of directors. Headquartered in Dallas‚ Texas defines itself as a “provider of integrated information movement and management.” The firm had two main business segments: Telecommunications Services‚ which provides long-distance‚ local and cellular telephone service to business
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