How i know percent gold form the cooper?
349502
Find the weight the object (with a precision scales) and its volume (put it in water and look at the amount displaced).\n\nCalculate the density = weight (in gram) / volume (in milliliter)\n\nYou will find a number lying between 19.3 (density of pure gold) and 8.92 (density of pure copper). Say you found 18 gram/ml\n\nThen the amount of gold is   (18-8.92)/(19.3-8,92) = 87.5% gold
30144
try treasurydirect.gov . last time i looked it was 6.73%
197166
35%\nif written .035 --> 3.5%
15523
The higher the number the more gold, percentage wise\n\nGold is a precious metal that has been valued by people since ancient times. People use gold for coins, jewelry, ornaments, and many industrial purposes. Until recently, gold reserves formed the basis of world monetary systems. \n\nGold is a very soft metal when it is pure (24 Kt. is pure gold). Gold is the most malleable (hammerable) and ductile (able to be made into wire) metal. Gold is usually alloyed (mixed with other metals, often silver and copper) to make it less expensive and harder. The scientific abbreviation of gold is Au. \n\nThe purity of gold jewelry is measured in karats. Some countries hallmark gold with a three-digit number that indicates the parts per thousand of gold. In this system, "750" means 750/1000 gold (equal to 18K); "500" means 500/1000 gold (equal to 12K).\n\nTherefore 14K is better.
1047483
Go to: www.e-gold.com and read about it.
68849
Gold is usally found in veins in mines.  This is after yearssssss of a couple different mixtures that could happen with elements and combounds that get really complicated an messy.  But, scientist have created a particle accelerator that shots atoms at one another to created a desired "pure" element, but this mechine is about the size of a football feild or so and the chamber that the bombarding happens in is a room as big as your average class room and it only produces just enough gold to little dust the tip of a sewing neddle.
1157571
http://www.kitco.com/charts/livegoldnewyork.html\n\n Gold \n Silver \n Platinum \n Palladium \n Rhodium \n\n can be found here
661019
50% (although it's more like a gold rather than a yellow)
128619
One carat in this sense is one twenty-fourth purity by weight. Therefore 24-carat gold is pure gold (99.99%), 12-carat gold is 50% purity. Therefore 10K will be about 42% pure gold and 14K will be about 58% pure gold.
934757
For some top forecasts on gold’s direction, visit the site below:\n\nI like the real GOLD nuggets. \n\nAs most gold is mined as very fine dust and tiny nuggets, the larger (over 1oz) nuggets are very rare! Actually they are as rare as large diamonds!\n\nI would suggest you look into large nuggets!\n\nTo see the 'live' spot NY gold price and some museum size gold nuggets I suggest you visit a great site I found a few months ago. I purchase a few nuggets from them just about a month ago, and not only are they beautiful to look at but in just the last few weeks they have really moved up in value!\n\nI'm actually saving to purchase others!\n\nThe site is:\n http://www.california-gold-rush-miner.us\n\nhttp://www.california-gold-rush-miner.us/australia-gold-nuggets.htm\n\nhttp://www.california-gold-rush-miner.us/crystalline-gold-miner.htm\nhttp://california-gold-nuggets-miner.blogspot.com\nhttp://www.brokerforyou.com/brokerforyou\nhttp://www.san-diego-dentist.us\nhttp://www.medical-research-study-directory.info/san-diego-medical-research-study.htm\nhttp://www.lasik-surgery-san-diego.info/lasik-eye-surgery-san-diego.htm\nhttp://www.websitetrafficbuilders.com/adsense.htm
727477
About $620 per ounce. Their is a market for gold and the price is determined by the law of supply and demand.\n\nYou can find the numbers and charts here:\nhttp://www.kitco.com/market/
1150475
You multiply [85/100] X 100 --> 85 %\n\nPercent and Percentage are the same in meaning but fall under different contexts. It's the way we apply it. Say for example; the PERCENTAGE of dog pet owners in a Region X is 78 %, and so on.
197049
To help understand % of something, think of each % as 1 cent so, 10% would be a dime or 10% of a dollar , 25% would be a quarter or 25% of a dollar and so on. so to get the percent of something think of it as 10 cents on every dollar\n10% of $100 is $10\n10% of $1000 is $100\n10% of $10000 is $1000\nsame as you looking at an item for $10 and it has 25% off\nyou know that's 25 cents of every dollar, so if you multiply that times 10, you get $2.50, then take that off the $10 and you have $7.50 final price\nGood Luck, Hope this helped you.
1096251
One easy quick & easy way to find out is the streak test. Rub the mineral in question across an unglazed porcelain tile. If the streak it makes is black then it is pyrite (fool's gold). If it is golden yellow then you have gold. You can find these tiles in your local home & garden shop or hardware store.\n\nAnother simple one is the hardness test. Gold has a hardness of 2.5 to 3 on Moh's Scale. Pyrite is 6 to 6.5. Glass has a hardness of about 5.5. According to Moh's scale you should be able to scratch glass w/ pyrite but not w/ gold. Pennies can also be used as their hardness is about 3.5.\n\nGold is found in several different forms or habits. It can be dendritic (vein-like) or massive as in nuggets. Upon examining pyrite more closely (perhaps w/ a 10x magnifier) you will see that while it resembles a gold nugget it is actually made up of many tiny little cubes.\n\nGold will not cleave whereas pyrite will. Cleavage is simply how a mineral breaks evenly due to weaknesses in its crystal structure. Pyrite has cubic cleavage so that when it is hammered it will come apart in perfect little cubes.
614326
for gold prices click on th link to free gold and then click on charts
706975
5.56 x 10^(21) = 5,560,000,000,000,000,000,000 conduction electrons.\n\nYou can calculate this two ways if you use the Wikipedia references of 5.90 x 10^(22) free electrons per cm^3, 19.3 grams per cm^3 for the density of solid gold or 196.966569 grams per mol, and 6.0221415 x 10^(23) for Avogadro's number.\n\nIn any case, the first step is to calculate the volume = (pi) x R^(2) x L, where pi = 3.1416, R = 1 mm = 0.1 cm, and L = 30.0 cm. Do the math: V = 9.425 x 10^(-2) cm^3.\n\nIf you multiply the calculated volume by 5.90 x 10^(22) free electrons per cm^3 you arrive at 5.56 x 10^(21) free (conduction) electrons.\n\nOr, as a check, calculate the mass of this volume: 9.425 x 10^(-2) cm^3 x 19.3 grams per cm^3 = 1.819 gm. Divide this mass by 196.97 grams per mol to obtain 0.009235 mols of gold and then multiply by Avogadro's number to obtain 5.56 x 10^(21) gold atoms. Each gold atom has just one valence electron to act as a conduction electron, so the number of gold atoms is also equal to the number of conduction electrons.
1039864
If you can measure the weight and volume of the ring, you could find its density.  The value will be different depending on what purity it is (24k will be denser than 12k, for example).  Most gold in jewelry is not 24k, but some alloy with nickel, copper, etc. that makes it harder.  These alloys are also how you get white, pink, and green gold.\n\nBiting a ring will only give you marks if it is 24k gold.\n\ndensity would be the easiest way, I'd say.  (density = mass/volume)\nYou'll need the equipment to measure pretty small masses and volumes, though, which most people don't have in their kitchens.