thin layer of gases‚ 95% of these gases are within the first 20km of the earth’s surface. Of the 17 elements that make up 99.5%‚ the most abundant of these are Oxygen 49.2%‚ Silicon 25%‚ and Aluminum 7.5%. Then the next most abundant elements are Iron 4.7%‚ Calcium 3.4%‚ Sodium 2.6%‚ Potassium 2.4%‚ Magnesium 1.9%‚ Hydrogen 0.9%‚ titanium 0.6%‚ Chlorine 0.2%‚ Phosphorus Manganese and Carbon are all 0.1%‚ Sulfur 0.05% Barium 0.04%‚ Nitrogen 0.03% and the rest of the elements on the periodic table
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Chilean Copper Output It is estimated that Chile produces about 35% of the world`s copper supply. However‚ Chilean copper production has fallen by 730 000 tonnes over the last decade. Although declining ore grades are part of the problem‚ as more iron ore must be processed to produce the same amount of copper creating cost overruns‚ supply disruptions at some of Chile`s largest mines continue to occur due to labour strikes. Labour striking tends to correlate with rises in the price of refined
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Why did the depression of 1893 occur? Source: Romer‚ 1984 The depression‚ which was signalled by a financial panic in 1893‚ has been blamed on the deflation dating back to the Civil War‚ the gold standard and monetary policy‚ under consumption (the economy was producing goods and services at a higher rate than society was consuming and the resulting inventory accumulation led firms to reduce employment and cut back production)‚ a general economic unsoundness (a reference less to tangible economic
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inventions. One of the good things about the industrial revolution was‚ that they figured out how to melt more iron more quickly and more efficient than before‚ which led to the creation of a mass of machinery created in the years following. Those machines made it possible to produce more Iron‚ from which they could construct iron bridges‚ and soon to be followed train-tracks made out of pure iron. Because of this discovery‚ both the poor and the rich could travel throughout the country for a rather small
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pure elements like copper‚ iron‚ and aluminum. The fourth metal was an alloy which was brass. The purposes of this lab were to demonstrate that different metal elements have different densities‚ and that alloys have densities somewhere between those elements that compose them. We also calculated the percent errors between the actual densities and the expected densities. The actual density of aluminum was 2.76g/cc with the percent error being 2.67%. The actual density of iron was 7.88g/cc with the percent
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points) Data Table 1: Experimental Data Grams Percent of mixture Iron (Fe) fillings 0.9 g 20 % Sand 1.2 g 25 % Table salt 1.6 g 25 % Benzoic acid .8 g 16 % Total 4.5 g 86 & Questions A. How did your proposed Procedures or flow charts at the beginning of this experiment compare to the actual Procedures of this lab exercise? (2 points) I proposed a magnet would be the used to remove the iron from the mixture. I figured filtration was the method would be the procedure
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Dolomite mining is vital for business. Dolomite is type of carbonate mineral which incorporates iron dolomite and manganese dolomite. Dolomite may be the major mineral part made up of dolomite and dolomite limestone. The dolomite may be used in building elements‚ porcelain‚ glass and refractory after dolomite crushing. In chemical field small crusher‚ agriculture‚ environmental security‚ energy conservation‚ and so on. Therefore‚ the dolomite crusher is broadly used. The dolomite is especially utilizable
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to it’s original shape and size the material is said to have exceeded it’s elastic limit or yield stress. Equilibrium When all acting influences are balanced. Evaporation When a liquid turns into a gas. Ferrous metal A metal which contains iron. Freezing When a liquid turns into a solid. Fusibility The melting point of a material‚ i.e. when a solid changes to a liquid. Hardness Hardness is the ability of a material to resist scratching‚ wear and tear and indentation. Latent heat
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Mass of Zinc Determination on Galvanized Nails Introduction. In this experiment the mass of zinc on galvanized iron nails was calculated to determine the appropriate price that should be charged to coat a nail with zinc (galvanize) it. The effectiveness of gasometric and gravimetric analysis were assessed by carrying out both methods mathematically using values determined by this experiment‚ and then comparing these values using their percent differences. The mass of zinc found on each nail can
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Mg Magnesium -Mr. Magnesium replaced “r” with “g” in “Mr” and got the abbreviation of his name‚ Mg. Kr Krypton -Kryptonite is Superman’s enemy‚ so don’t confuse it with krypton the element. Ca Calcium -Cali eats calcium Br Bromine -Think of your bro when you think of Bromine‚ for the symbol erase the “o” and you got bromine. C Carbon -It’s really simple just think “C is for cookie‚ but also for Carbon.” As Arsenic -Arsenal is weapons‚ but arsenic is an element‚ think of As
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