which is better copper BB or zinc BB?
598430
Copper has a higher melting and boiling point and better electrical conductivity.\n\nIf you are a die caster, Zinc would be better because it can be easily pressure die-cast and hence better accuracy in the cast component with minimal metal removal for finishing.
183510
Try Zinc tablets u will shoot further 2
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...
529427
No, copper is NOT cheap, it costs quite a bit more than aluminum pound for pound. Copper has a much lower resistance to electricity than aluminum does. When subjected to the loads household wiring have to deal with, aluminum wiring would have to be prohibitively thick to prevent overheating. Copper provides the best conductivity with the best compactness for the best price.
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
802652
Zn is more reactive than Ni  (this is bcoz Zn is placed higher than Ni in the periodic table), so it would displace Ni from the solution of Ni(NO3)2. The reaction is \nZn + Ni(NO3)2 ----> Zn(NO3)2 + Ni
758041
brass is an alloy of copper and zinc, unless we have its composition, we cant tell its specific heat.
19390
Zinc hydroxide - ZnOH2.
105749
Brass IS a copper alloy. If you want to tell the difference between pure copper and an alloy, pure copper is soft enough to be gouged with a dull knife.  An alloy will be harder. Could also calculate the density:  Mass of object/amount of water object displaces.  Google density of Copper for the value.
652820
1) German silver  \nGERMAN SILVER [German silver] name for various alloys of copper, zinc, and nickel, sometimes also containing lead and tin. They were originally named for their silver-white color, but use of the term silver is now prohibited for alloys not containing that metal. German silver varies in composition, the percentage of the three elements ranging approximately as follows: copper, from 50% to 61.6%; zinc, from 19% to 17.2%; nickel, from 30% to 21.1%. The proportions are always specified in commercial alloys. German silver is extensively used because of its hardness, toughness, and resistance to corrosion for articles such as tableware (commonly silver plated), marine fittings, and plumbing fixtures. Because of its high electrical resistance it is used also in heating coils. It was discovered (early 19th cent.) by a German industrial chemist, E. A. Geitner. \n\n2) galvanizing  \nGALVANIZING [galvanizing] process of coating a metal, usually iron or steel, with a protective covering of zinc. Galvanized iron is prepared either by dipping iron, from which rust has been removed by the action of sulfuric acid, into molten zinc so that a thin layer of the zinc remains on the surface of the iron upon removal or by a method of electroplating. Iron is also coated with zinc by a method in which the iron is first covered with the zinc dust and then baked; an alloy is formed at the surface, the resulting product being known as sherardized iron. Sheets of pure iron, copper iron, and various steels, as well as wire and netting, are often galvanized, since the zinc coating resists oxidation and the action of moisture very successfully. When the coating is broken or pierced some protection is still afforded, since the zinc reacts with the corroding agent first.
332542
Copper is a pure metal. The conductivity of metals increase with temparature owing to decrease in the vibration of the +ve ions in the crystal lattice. Germanium is a semiconductor. Its conductivity decreases with temparature. Hence copper has more conductivity than Ge at low temps.
792118
As copper is more reactive than silver it will give up its two electrons to silver ions so when is really happening is:-\n\n2Ag+  + Cu → Cu++ + 2Ag\n\n(The nitrate ions (NO3‾) are passive)
787702
Silver has a higher reflective index than any other industry-related metal anhydride.  For economic purposes, titanium isn't used in most commercial labs.  However in some superconductors, the 0.003% difference is crucial.  Though it costs much more.
1130318
The cent, once a copper coin, is now composed of copper-plated zinc. Copper-plated cents cost less to manufacture, and at 2.5 grams each, they weigh about 20% less than the older cent, which was 95 percent copper and 5 percent zinc.\n\nSo there's not enough copper there to make it worth your while -- it will cost more to get the copper than the value of the metal, even at $4 per pound.
887687
Below is a link to a practical for finding the % copper in pennies.  The same method will work using brass in place of pennies.\n\nhttp://www.creative-chemistry.org.uk/alevel/module5/documents/N-ch5-17.pdf
889558
copper metal is listed as "very unreactive".  This means it is relatively stable as a metal, and relatively unstable as an ion.\n\nMagnesium metal "reacts with acids" so it is more stable in ionic form than copper,and less stable as pure metal.\n\nThe goal of nature is to go from an net unstable form to a more stable form.  (This is called reducing the free energy, or delta G of a system).\n\nIn order to use the activity series:\n\nany metal below a given metal is less stable in ionic form and more stable as a pure metal.\n\nThis means that a pure metal can reduce the ions of any metals below it.\n\nFor example, aluminum metal can reduce manganese ions, zinc ions, and so on because they are below it.\n\nAluminum metal cannot reduce magnesium ions, calcium ions, and other metals above it.\n\nI hope you can get it now.  Ok I am sure what I typed is correct now.  Good luck!\n\nhttp://en.wikipedia.org/wiki/Activity_series
223614
copper and aluminum are best electricity conductors. I would say lead, since it's one of the densiest material out there. Heat is caused by vibrating atoms, denser material means the atoms are closer, and it's melting point is low too. As soon as you touch it with a hot soldering iron, the heat transfers right away and melts it.