what is the chemical compostion of seashells?
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Seashells are formed by layers of calcium carbonate, covered by a thin organic surface layer, the periostracum.\n\nCalcium carbonate may occur as two different minerals: calcite and aragonite. Calcite is more stable, but aragonite is harder than calcite. Calcite is the main shell component in oysters; whereas aragonite is more important in freshwater and land snails. Many marine molluscs have alternate layers of both minerals. \n\nThe periostracum is formed by a type of conchin (quinone-tanned proteins, somewhat similar to insect exoskeleton). Conchin may also be incorporated in the mineralized layers.
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ozone\n\nREAD THE PACKAGE
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sand is made up of a chemical compound called Silica (SiO2).
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www.carolina.com/STC/living_materials/vinegar_eels.asp\n\nwww.members.optushome.com.au/chelmon/vinegar.htm\n\nhere you go i hope this is good enough and good luck on your project
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Calcium Carbonate .. \n\nCheck this web site its nice ... \n\nhttp://www.mbmp.org/corals.htm
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I've never heard of such a process.   The concentration of gold ions in sea water is so low that the only way we're ever going to extract it economically will be with genetically engineered organisms.   After all, there are only a few parts per million of calcium ions in sea water, but shellfish extract them and make shells of almost pure calcium carbonate.   Maybe they could be genetically modified to do the same with other elements.   Work is being done right now on biological mining.   You develop plants that concentrate the element you want from the soil.   Then you harvest it and extract the element.   The Dutch have been doing something similar for centuries.   When they've built a dike and reclaimed a polder from the sea, they desalinate the soil by planting a type of grass that sucks up the salt, and after harvesting the grass they remove it.   After repeating this process a few times, the salt level is low enough to grow ordinary crops.
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fiberglass is glass the only possible chemical that could "disolve" (because it won't, it will create a salt) is hydrofluoric acid (HF). However this chemical is EXTREMELY DANGEROUS, it reacts with anything. Professional training is needed before handeling this chemical (lethal dose is 30 ppm)
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The chemical formula is CaCO3 (calcium carbonate). \n\nThey probably wouldn't make toothpaste out of it if it had dangerous amounts of arsenic in it. However, the content does vary, since limestone forms in the ocean it will have concentrations of many elements that are found in seawater.  For example in some Florida limestone the concentration of arsenic is 3mg/kg (3 ppm).\n\nMarble is a metamophosed limestone (not a conglomerate). Often in construction trades, polished limestone is called marble, although to a geologist it is still not marble. \n\nIn some water treatment plants  limestone (thus marble) is used to REMOVE arsenic from water. \nhttp://water.usgs.gov/wrri/02grants/2002SD1B.html\n\nI would say if you don't have to put it in your aquarium don't do it. The far bigger problem than the arsenic might be that if your aquarium is slightly acidic it will begin to dissolve the marble, and make the water rather hard. I can't imagine this would be good for most freshwater fish.
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Calcite is often the primary constituent of the shells of marine organisms (e.g. plankton, bivalves, etc.)\n\nUses: In cements and mortars, production of lime, limestone is used in the steel industry; glass industry, ornamental stone, chemical and optical uses and as mineral specimens.
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NA2SO4,KOH,AGCL,CA(NO3)2 ARE SOLUBLE.AND HG2BR2 AND CDS IS INSOLUBLE.
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In a nut shell, the  rock it self contains  a  carbonaceous base substance like baking soda\n\n If you add vinegar to baking soda it will made the vinegar go up the same will happen to your rock if you add vinegar to it.
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The ocean is essential for life on Earth, and also helps make the climate fairly moderate. However, although the ocean contains 1,370 million cubic kilometres (334 million cubic miles) of water, humans can’t survive by drinking from it—it is too salty.\n\nTo a chemist, ‘salt’ refers to a wide range of chemicals where a metal is combined with a non-metal. Ordinary common salt is a compound formed when the metal sodium combines with the non-metal chlorine—sodium chloride. This contains electrically charged atoms, called ions, that attract each other, resulting in a fairly hard crystal. When salt dissolves, these ions separate. Sodium and chloride ions are the main ions in seawater, but not the only ones. The salty seas benefit man, because the ocean provides many useful minerals for our industries.
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hmmm! go to this site>>>\n Candidate Reagents for Dissolution of Hanford Site Tank Sludges ...File Format: PDF/Adobe Acrobat - View as HTML\nIn none of the 5 runs with these compounds was the complete dissolution of ... acidic or moderately alkaline media without perturbing the oxidation state of ...\n \n  >>>> www.pnl.gov/main/publications/ external/technical_reports/PNNL-14378.pdf
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H2O2 gradually decomposes to water and oxygen. The process is catalyzed by heat, light, base, and traces of heavy metal ions (such as iron, manganese, etc), but not Tin. \nTin surprisingly, along with many other organic compounds, such as acetanillide are used as stabilizing agent at ppm level.\nIt's estimated when properly stored at 15-25 oC under dark condition in plastic bottle, free from contaminants ACS grade H2O2 degrades at a rate of 1-3 %/year. So it's not that bad.
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Calcium can be obatined from coral and oyster shell, as well as (I think) the calcium that comes from the earth.  Calcium contains animal derivatives in the sense that coral calcium  comes from coral which are the endoskeletons of coral; oyster shell calcium is derived from (big surprise) oyster shell and calcium generally is a skeletal product but can also be made by electrolyzing lime in mercury.  As to how the tablets are made, I believe the powdered calcium, along with such additives as carbonate, phosphorus or Vit. D, is put in molds, pressure is applied and, voila, tablets.
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The main ingredient in eggshells is calcium carbonate (the same brittle white stuff that chalk, limestone, cave stalactites, sea shells, coral, and pearls are made of). The shell itself is about 95% CaCO3 (which is also the main ingredient in sea shells). The remaining 5% includes calcium phosphate and magnesium carbonate and soluble and insoluble proteins
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shells are usually made of macre, which is a mixture of conchiolin followed by an intermediate layer of calcite or aragonite then a layer of calcium carbonate.