PYRITE or HEMATITE or GALENA or LIMONITE??
126242
iron pyrite is the scientific term for fools gold
18765
CuI2 Copper (II) iodide\nSF6 sulfur hexafluoride\nNaOCl Sodium hypochlorite\nPb3(PO4)2 lead (II) phosphate\nHClO Hypochlorous acid\n\nChlorine triflouride  ClF3\nChromiumIII carbonate  Cr2(CO3)3\nPotassium Chlorate KCLO3\nSodium peroxide Na2O2 \nMercuryI chloride HgCl\n\nThanks You're welcome
380195
Karat Juice (like 24 Karat)\n\nMellow Geolo (the name "gold" comes from the Old English word geolo (yellow))
162786
Pennies can't rust.  The chemical composition isn't right.  Rust is Ferric oxide and ferric is iron.  A penny contains, primarily, copper.
372523
2. Halite, Diamond, Graphite and Coal are minerals\n3. The Atoms in a mineral...\n4....liquid rock material under the Earth's surface.\n5....when salt water evaporates\n6. The largest group of rock...\n\nSorry, I don't know what they want in #1
308296
the answer is fire because if you give fire something to burn it will live, maybe even get bigger, but if you put water on it, it will go out... so the answer is... FIRE!
279993
(NH4)2 SO4  + (FeSO4)2 + 2H2O____(\nNH4)2SO4Fe2(SO4)3.24H2O\n\nAmmonium ferric sulphate
474751
Copper. It is so brilliant
92804
yeah, if I could scratch it with a steel knife.  Pyrite would be flaky and would feel like glass almost. Gold would be soft and I could sink a knife into it a bit.  I don't know what silver feels like but I could tell it after I found the first two.
226366
The best test is a streak test. If you are not familiar with this, it is when you rub the mineral across a piece of unglazed porcelain plate or tile.\n\nIn a streak test the gold will leave behind a gold streak while pyrite will leave behind a black one. This works, trust me, I know. All you need is a piece of unglazed porcelain.\n\nYou said earlier about rubbing it across the skin. I have never seen this work however some cheap jewlery is made of pyrite & will leave the fingers, etc. black looking. That is after you wear it a while.\n\nGold is very dense for its size. Pyrite is not nearly as dense. You could do a density test by displacement in water but I assume from what you told me that the "gold" is in a matrix.\n\nPyrite is usually found as a mass of cubic crystals. Sometimes they take on the appearance of a nugget b/c the cubes are very tiny. Gold will not have these cubes.\n\nGold is sometimes found in quartz veins. If you have a chunk of quartz it is possible that there is some gold in there.\n\nGo with the streak test & let us know what happens.\n\n:)
592586
A rotating ring (Pt)-disc (FeS2) electrode was used to investigate the surface oxidation process of pyrite in the hydrochloric solutions. It is reported for the first time that the oxidation intermediates of pyrite were formed on the disc electrode and then oxidized on the ring electrode. The results indicate that at a rotation rate of 20 Hz, when the disc electrode potential was in the region of 0.43 to 0.62 V and the ring electrode potential was at 1 V vs a standard calomel electrode (SCE), approximately 50% of the reacted pyrite was oxidized to ferric and sulfate ions and the other 50% was oxidized to sulfur and ferrous ions on the disc electrode. The latter was further oxidized to ferric ions on the ring electrode. As the disc electrode potential increased to 1.22 V vs SCE, more than 90% of the reacted pyrite was oxidized to ferric and sulfate ions on the disc electrode and less than 10% formed ferrous ions, which were further oxidized to ferric ions on the ring electrode.
649006
Lime?\nPfeifer ?\nWish you the best
426988
in order:\nammonium chloride\ncalcium nitrate\nIron(III)hydroxide(this will turn to Fe2O3 fast which is rust)\nSodium carbonate\npotassium sulfate\nammonium sulfate\nI think you mean: Ca(NO3) with this one which is calcium nitrate\nand the last one is magnesium nitrite(not nitrate)
512419
It would be Iridium and if you need a small sample of it, they use very very small amounts of it in spark plugs because it supposedly produces better spark and combustion.
344138
If you assume Iron(III) oxide (ferric oxide, Hematite, red iron oxide, synthetic maghemite, colcothar), then no.
80541
definitely sulphate... lol...ne ways, u gotta mix those stuff n leave it over nite to crystalise..then break it to pieces..or, u can jus ask ur chemistry teacher..haha.. all i did in sch was crystalizing copper sulphate usin the solution itself..
530524
Just a guess: Because of all the coal around this area, I would suppose that sulfide minerals, especially pyrite (iron sulfide) would be common. Some sphalerite (Zn, Fe sulfide) has been found in Lucerne county. Some rozenite (hydrated Fe sulfate) has been reported from Jeddo Highland coal mine in Hazleton.\n\n"Sulfide minerals typically occur in coal beds as well as in strata overlying and underlying the coal. Weathering and aqueous dissolution of the sulfide mineral oxidation products, including dissociated sulfuric acid and metals (e.g., Fe, Mn, Al), produces surface and groundwater degradation." \nwww.epa.gov/waterscience/ guide/coal/support/support2.pdf\n\n"By far the most serious environmental problem caused by abandoned mines is polluted water. It happens when rain comes into contact with a surface or underground mine and interacts with the mineral pyrite, better known as fools' gold, to form sulfuric acid. The toxic brew discharges into streams and rivers, choking off plants and wildlife and coating streambeds with iron hydroxide, tinting water yellow, red or orange. Aluminum, manganese and other metals also leach into the water.\nOld mining operations have polluted about 4,000 miles, or 5 percent, of the rivers and streams in Pennsylvania, officials estimate. The west branch of the mighty Susquehanna River is dead for its upper 70 miles; 1,000 miles of its tributaries are likewise lifeless. The Jeddo Tunnel, an engineering marvel drilled through miles of solid rock to drain deep mines in the Hazleton area, discharges 40,000 gallons of polluted water a minute into the Little Nescopeck Creek -- the largest such discharge in a state full of them."\nhttp://www.theminingnews.org/news.cfm?newsID=951