What do you get when combining copper & zinc?
85537
Hi Oldinway\n\n\nThe important alloys of copper and zinc from an industrial point of view are the brasses comprised within certain limits of zinc content. The addition of zinc to copper results in the formation of a series of solid solutions which, in accordance with usual practice, are referred to in order of diminishing copper content as the ?, ß,?, etc., constituents.\n\nThe copper alloys may be endowed with a wide range of properties by varying their composition and the mechanical and heat treatment to which they are subjected. For this reason they probably rank next to steel in importance to the engineer.\n\nThe important alloys of copper and zinc from an industrial point of view are the brasses comprised within certain limits of zinc content.\n\nThe addition of zinc to copper results in the formation of a series of solid solutions which, in accordance with usual practice, are referred to in order of diminishing copper content as the a, b, g, etc., constituents.\n\nThere is a certain connection between the properties and the microstructure which may be expressed in general terms.\n\nThe tensile strength increases with increase in zinc content, rises somewhat abruptly with the appearance of b, and reaches a maximum at a composition corresponding roughly to equal parts of a and b. It falls off rapidly at the appearance of the g constituent.\n\nElongation rises to a maximum and begins to fall again before the composition reaches the limit of the a solution. It falls considerably as the amount of b increases, and is very small in the presence of g.\n\nThe a constituent shows the greatest resistance to shock. This is diminished by the presence of b, and the alloy becomes extremely brittle when g is present.\n\nHardness is greatly increased by the presence of b and still further when g appears.\n\nAlloys containing a phase only are specially suitable for cold working, and may be hot- or cold rolled. Those containing a and b will suffer very little deformation without rupture in the cold rolling and may only be hot rolled. The b constituent may also be forged, rolled or hot extruded, but alloys containing g should invariably be avoided for any mechanical treatment.\n\n\nDesignation system of brasses\nThe brasses of industrial importance are often designated by their copper and zinc content.\n\nC 23000 - Red Brass (85 Cu, 15 Zn)\nThis alloy is used for ornaments and for cheap jewellery which is to be gilded: it withstands cold-work, cupping, etc. On account of the range of solidification, the cast material has a dendritic structure.\nIf cooled very slowly or annealed, diffusion takes place, yielding polyhedral grains of uniform composition. The process of diffusion is assisted by mechanical deformation of the grains by hot- or cold work followed by annealing. The changes which occur in rolling and annealing are similar to those described for 70:30 brass.\n\n\nC 26000 - Cartridge Brass (70 Cu: 30 Zn)\nThis alloy, which is used widely for tubes, sheets and wires, also shows a dendritic structure of the a solid solution when chill fast. The b constituent does not begin to appear in the cast structure until the zinc exceeds 32% except in the presence of an additional element like aluminum or tin.\nAfter annealing, the alloy consists of homogeneous solid solution, and it is specially suitable for cold-working. To withstand this treatment, especially drawing, it is necessary that the brass should be perfectly sound and free from impurities.\n\nSince high grade 70:30 brass is usually made from the purest copper and zinc available without admixture of any but the cleanest scrap, these impurities are chiefly inclusions of dross (oxides or silicates) or charcoal. Such inclusions, if present, frequently lead to failure of the material during manufacture or in use. They become entrapped in the solidifying metal, either by splashing or by rapid solidification in moulds of small cross section.\n\nIt is a frequent procedure in casting brass to
829148
I'll do one, and hopefully that'll help you figure out the rest.\n\n11. The first step is to create a balanced reaction.  I'm doing this from memory, and I could be wrong, so check it.\n2Zn + 2HCl ----> H2 + 2ZnCl\n\nNow figure out how many moles of zinc are in 3255 grams.  The atomic weight (aka the molar mass) of Zn is available from the periodic table:\n3255/65.409 = 49.764 moles\n\nSince you will have 2 moles of ZnCl for every 2 moles of Zn (a 1:1 ratio), you know that you will also end up with 49.764 moles of ZnCl.\n\nFigure out the molar mass of ZnCl by adding the atomic weight of Cl to that of Zn, then multiply this number by the total number of moles:\n(65.409 + 35.453)(49.764) = 5019.276g ZnCl\n\nUse the same method to solve all the rest.
1090462
something with zinc ... makeshure it has at least a spf of 30...
879268
Zinc is by far the best element. I also like plutonium.  It's just fun to say. "Plutonium."
888667
Cu2S + 12HNO3 -> Cu(NO3)2 + CuSO4 + 10NO2 + 6H2O\n\nThere you go.
916549
2Cu + O2 ---> 2CuO,          \nThis is copper oxide or cupric oxide or copper( II )oxide\n\n4 Cu + )2---> 2Cu2O\nCopper also combines with oxygen as Cu2O, cuprous oxide , or copper(I) oxide
846058
yup it does to give copper oxide, water and carbon dioxide\n\nCu(HCO3)2======> CuO +H2O +2CO2
623319
Copper is a tricky one, as there appears to be true demand from China and not that many new ways of digging up significantly more ore.  It might be that people who rely on copper decide to find ways to get around using copper.  Maybe aluminum cable instead?\n\nIn the case of zinc, there is a special price level maybe 10% or so above where it is now, where it is worth melting US pennies (which are 97.5% zinc).  At this price the zinc and copper in pennies becomes worth more than one cent per penny, plus the energy needed to melt it down.  There will then be a huge amount of illegal melting of pennies and demand will be satisfied for awhile.\n\nIn summary I think copper might be higher, but there is a lot of uncertainty due to the various things that could happen, such as a decrease in copper demand.  And zinc price could be limited by penny melting.  I wouldn't invest much in this area personally.
385723
Pennies from 1980/81 and before are already pure copper, so no work would be necessary, other than cleaning them.  New pennies are copper-plated zinc.  A simple way to extract the copper is to make a gash in the side of the penny, then drop the penny in some hydrocholoric acid.  The HCL will react with the zinc to form zinc chloride (expelling hydrogen gas), but will not react with the copper.  This will leave you with a thin copper shell (FYI, this is a common high school/general chemistry experiment).  It is actually a fairly cool experiment.
924016
Hey,\nI know a little about zinc. But I thought these two sites might help you\n\nhttp://ergosphere.blogspot.com/2005/06/zinc-miracle-metal.html\n\nhttp://www.ctds.info/zinc1.html\n\nHave fun
122259
wow open question here...what is the end result and use. if it is say for automobiles it would be copper, nickle and chrome for cheep jewerlery sure gold last...many possible answers
112630
You need two different kinds of metal. Copper is easy for one. The other can be almost any non-copper metal. Simple trial and error should show you a good choice. \n\nTry: nails, silverware, pointy tools (screwdrivers), bits of metal from craft or hobby jobs, coat hangers, etc. You can even jam coins in there!
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it brings in elements like Zn, Mg, Na, Fe\n\nVitamin: Vitaminc C and B
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iron \nbronze\nbrass\nzinc (Jia Jing 15-20% zinc)\n\nMore details on Alloy Compositiob, see\nhttp://www.britishmuseum.co.uk/product.aspx?ID=1034\n\n"the coinage alloy from bronze to brass occured during the early part  of the 16th century, specifically during the later Hong Zhi period"
1014247
there are different tempuratures to melt gold and copper,for instance gold is a softer metal and it will melt before the copper.say the temp for melting gold is 1000 degrees,and copper is 1200 degrees,the gold will melt first.
799013
This one is easy as well... THERE IS NO REACTION!\n\nPB is lower on the activity series, so it cannot replace the Zn in the zinc nitrate...
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A normal chemical battery or pencil cell converts the chemical energy stored in it to electrical energy.The reactions between zinc and copper sulphate produces the reqiured energy.\nAbout stryroform...well frankly speaking I dont have the slightest idea...but u can try \nwww.answers.com\nmaybe it will help u