in karats (K), where 24K represents pure gold related questions

- 1The amount of gold jewelry and other products is measured
in karats (K), where 24K represents pure gold
The amount of gold jewelry and other products is measured in karats (K), where 24K represents pure gold. The mark 14K on a chain indicates that the ratio between the mass of the gold in the chain and the mass of the chain is 14:24 If a gold ring is marked 18K and it weighs 0.4 oz, what is the value of the gold in the ring if pure gold is valued at $300 per oz?

- 2How much pure gold should be melted into 5 grams of a 62% gold alloy to make it an 85% gold alloy
How much pure gold should be melted into 5 grams of a 62% gold alloy to make it an 85% gold alloy?

- 3g bracelet is suspected pf being gold plated lead instead of pure gold
A 50.g bracelet is suspected pf being gold plated lead instead of pure gold. It was dropped into a full to the rim glass of water and 4cm to the third power overflowed. Is the the bracelet pure gold. Explain. (Density of gold=19 g/cm to the third power and lead=11 g/cm to the third power)

- 4The percent of pure gold in 14-karat gold is about 58.3%
The percent of pure gold in 14-karat gold is about 58.3%. A 14- karat gold ring has a mass of 5.6 grams. About how many grams of pure gold are in the ring?

- 5How to get pure gold from impure gold
How to get pure gold from impure gold..please specify the chemical equation.. any example is fine,e.g. AuCl3 -> Au

- 6A goldsmith combined pure gold that cost $400 per ounce with an alloy of gold that costs $150 per ounce
A goldsmith combined pure gold that cost $400 per ounce with an alloy of gold that costs $150 per ounce. How many ounces of each were used to make 50 oz of gold alloy that that costs $250 per ounce?

- 7how does adding copper to gold change the economic value of the gold and the properties of the gold
how does adding copper to gold change the economic value of the gold and the properties of the gold?

- 8a king paid a guy 4/5 of a bar of gold, the guy gave half the gold to charity, how much gold did he give to charity
a king paid a guy 4/5 of a bar of gold, the guy gave half the gold to charity, how much gold did he give to charity

- 9A goldsmith has 80g of an alloy that is 50% pure gold
A goldsmith has 80g of an alloy that is 50% pure gold. How many grams of an alloy that is 80% pure gold must be combined with the 80g of alloy that is 50% pure gold to form an alloy that is 72% pure gold?

- 10The density of free electrons in gold is 5.90 × 1028 m-3. The resistivity of gold is 2.44 ×...
The density of free electrons in gold is 5.90 × 10^28 m^-3. The resistivity of gold is 2.44 × 10^-8 O·m at a temperature of 20°C and the temperature coefficient ofresistivity is 0.004 (degrees C)^-1. A gold wire, 1.2 mm in diameter and 67 cm long, carries a current of 339 mA. What is the value of N×10^-18, where N is the numberof electrons per second passing a given cross section of the wire. Express the answer with one decimal place.

- 11If 57.9 grams of gold has a volume of 3 cubic centimeters what is the density of gold in g/ cm3,
If 57.9 grams of gold has a volume of 3 cubic centimeters what is the density of gold in g/ cm3,?

- 12Physical properties of matter for gold vs "fools gold" and coffee vs tea
Physical properties of matter for gold vs "fools gold" and coffee vs tea