Thursday

December 18, 2014

December 18, 2014

Number of results: 11,390

**Chemistry**

14 carat gold has a purity of 58.3% How many moles of gold are in 124 grams of 14 carat gold ?! Answer in units of moles. how would yu do this problem ?! explain pleasee. !
*July 26, 2010 by Nicole*

**chemistry**

14 carat gold has a purity of 58.3%. how many moles of gold are in 155 grams of 14 carat gold? answer in units of moles.
*September 8, 2010 by Jordyn*

**chem**

14 carat gold has a purity of 58.3%. How many moles of gold are in 137 grams of 14 carat gold? Answer in units of moles.
*February 1, 2011 by pho le*

**AP Chemistry**

14 carat gold has a purity of 58.3%. How many moles of gold are in 172 grams of 14 carat gold? Answer in units of moles
*September 19, 2012 by Lacey*

**Maths**

In a jewllery shop, necklaces are sold as either 18 carat gold, 22 carat gold or 24 carat gold. The number of necklaces in stock in the shop are shown: 18 carat: 40 stock 22 carat: - 24 carat: 20 stock 25% of the stocks of necklaces are 22 carat How many 22 carat necklaces are...
*October 27, 2011 by 10M1*

**chemistry**

From the jewelry descriptions given, select the homogeneous mixture or solution. Answer?? 10 carat (K) electroplated gold jewelry 24 carat (K) gold jewelry (i know this is pure gold) 18 carat (K) gold jewelry Are these right? CaCl2>>calcium chloride NaF>>>sodium...
*January 28, 2013 by Lucky*

**Chemistry **

From the jewelry descriptions given, select the homogeneous mixture or solution. Answer?? 10 carat (K) electroplated gold jewelry 24 carat (K) gold jewelry (i know this is pure gold) 18 carat (K) gold jewelry Are these right? CaCl2>>calcium chloride NaF>>>sodium...
*January 28, 2013 by Lucky*

**Honors chemistry**

i am doing a project for school and i was told to research the alloy of 16 carat gold. I have found all the other information that i need, but i cannot find the melting or boiling point of 16 carat gold! please help soon my project is due tomorrow.
*October 30, 2011 by Anonymous*

**problem solving**

You purchased 18 karat gold chain that weights 15 grams. How much gold did you purchase in grams? In carats? (1 carat=0/2 grams)
*December 11, 2012 by ben*

**Honors chemistry**

how much is 100 grams of 16 carat gold?
*October 29, 2011 by Anonymous*

**Algebra**

The purity of gold is measured in karats. Twenty-four karat gold is pure gold and k karat gold is k/24 gold by mass. One piece of 16-karat gold jewelry has a mass of 30 grams and another piece of 10-karat gold jewelry has a mass of 40 grams. Find the number of grams in the ...
*January 26, 2011 by Laur*

**Algebra 2**

The purity of gold is measured in karats. Twenty-four karat gold is pure gold and k karat gold is k/24 gold by mass. One piece of 16-karat gld jewelry has a mass of 30 grams and another piece of 10-karat gold jewelry has a mass of 40 grams. Find the number of grams in the ...
*January 30, 2011 by Jay*

**Honors chemistry**

What is the melting and boiling point of gold 16 carat
*October 29, 2011 by Anonymous*

**CHEMISTRY**

Determine the solvent and solute in the following : a) carat 14 gold b) gaseous drinking ( pepsi for ex.)
*September 11, 2014 by MAD*

**chemistry**

A diamond is a natural form of pure carbon. How many atoms of carbon are in a 1.00 carat diamond. (1.00 carat= 0.200 grams) Helppp pleasee!
*July 29, 2008 by jecce.*

**Chemistry**

The density of carbon in the form of diamonds is 3.51 g/cm^3. If you have a 40- carat spherical diamond, what is the diameter of the diamond in millimeters? (1 carat=0.200 g)
*March 7, 2013 by Sophie*

**Chem**

Diamonds are measured in carats (1.0 carat=0.200g). The density of diamond is 3.51 g/cm^3. What is the VOLUME of a 5.0 carat diamond?
*September 4, 2012 by Crissy*

**algebra**

A goldsmith has two gold alloys. The first alloy is 30% gold; the second alloy is 80% gold. How many grams of each should be mixed to produce 10 grams of an alloy that is 40% gold? amount of 30% gold ___ g amount of 80% gold ___ g
*November 27, 2014 by Jer*

**Chemistry**

The relative amount of gold in an alloy is commonly expressed in units of carats. Pure gold is 24 carats, and the percentage of gold in an alloy is given as a percentage of this value. For example, an alloy that is 50 percent gold is 12 carats. State the purity of the gold ...
*August 18, 2013 by Anonymous*

**College Algebra - Chemistry**

A goldsmith has two gold alloys. The first alloy is 25% gold and the second is 55% gold. How many grams of each should be mixed to produce 40 grams of an alloy that is 43%?
*December 11, 2010 by Lyanne*

**College Chemistry/Lab Math**

I think I have this problem figured out correctly, but is there anyone who can tell me if I'm doing something wrong. The question is... "One troy ounce of gold is worth $380. There are 33.8 grams per troy ounce. You have a stock colloidal solution of a very fine gold dust. It'...
*March 17, 2013 by James*

**Physiology**

Pure gold has a density of 19 g/ml. If you bought a gold ring and found it had a volume of 0.3 ml and it weighed 5.7 grams, is it real gold? Show me your calculation
*January 27, 2011 by Jerome*

**Algebra**

A goldsmith has two gold alloys. The first alloy is 20% gold; the second alloy is 60% gold. How many grams of each should be mixed to produce 40 grams of an alloy that is 30% gold? amount of 20% gold_____g Amount of 60% gold_____g
*June 1, 2013 by Rick*

**algebra**

assume that a jeweler needs 80 grams of an alloy that is 30% gold. He has avaliable one alloy that is 5% gold and another that is 85% gold; he will mix some of each If x equal the number of grams of the first alloy (so the number of grams of the second is 80-x), find x
*October 20, 2010 by chad*

**chemistry**

zinc displaces gold in seawater present int he form of gold (III) hydroxide. What mass of gold can be recovered if 20 moles of zinc are available?
*July 25, 2011 by luz*

**Chemistry**

I am trying to figure out how much 1.134 grams worth of gold will cost, if gold is at 380 dollars an ounce. I set up proportions like this: 380 doll./1.34 grams (how many grams are in an ounce) = BLANK/1.134 grams (mass of coins). I got $321.58. But this is incredibly ...
*April 23, 2009 by Aline*

**refining**

If I have a solution of gold chloride, is there a was I can grow metalic gold crystals to recover the gold instead of using sulfer dioxide to drop the gold as poeder?
*February 12, 2012 by art*

**chem**

How many gold atoms are in an 0.408 ounce, 18 gold bracelet? (18 gold is 75% gold by mass.)
*September 19, 2011 by tiffany*

**Pre-Calc**

Gold weighs 19.3 grams per cubic centimeter (cc), and silver weighs 10.5 grams per cc. A. Write a formula for the weight of one cc of a mizture of silver and gold in terms of the volume of gold in the cc. B. If one cc of mizture weighs 12.7 grams, what is the weight of gold in...
*November 11, 2009 by Tritanianna*

**Physics**

The karat is a dimensionless unit that is used to indicate the proportion of gold in a gold-containing alloy. An alloy that is one karat gold contains a weight of pure gold that is one part in twenty-four. What is the volume of gold in a 20.0-karat gold necklace whose weight ...
*November 8, 2010 by Sarah*

**math**

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 . If a gold ring is marked 18K and it weighs 0.4 oz...
*March 17, 2010 by kirk*

**Adut education**

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...
*October 18, 2009 by debbie*

**science**

what is the karat count of gold in a bracelet that contains 15 grams of gold and 5 grams of silver
*May 13, 2008 by demarco*

**Physics**

A king's crown is said to be solid gold but may be made of lead and covered with gold. when it is weighed in air, the scale reads 0.475 kg. when it is submerged in water the scale reads 0.437 kg.is it solid gold? if not, what percent is mass is gold? (density of gold= 19.3x10^...
*May 6, 2012 by Sarah*

**MATH**

One particle(atom) of gold weight 197 atomic mass units. One atomic mass unit is approximately 1.6601 x 10^-24 grams. How many particles of gold are there in 197 grams of gold? Use scientific notation where and when appropriate.
*May 7, 2014 by JOHN DUNN*

**Science**

Help!! How many atoms in 3.45 mL of water? (H2O only;mL=g) and If you are out panning for gold and discover a nugget that is exactly 2.50 moles, how many molecules, atoms, and grams would you have? At a cost of $375 per ounce, what would be the value of gold?
*October 20, 2010 by Jack*

**Chemistry**

Earth's oceans have an average depth of 3800 m, a total area of 3.63 108 km2, and an average concentration of dissolved gold of 5.8 10-9 g/L. (a) How many grams of gold are in the oceans? (b) How many cubic meters of gold are in the oceans? Assuming the price of gold is $392....
*August 25, 2013 by Anonymous*

**chemistry**

how many moles of gold are there in 1.00 L of seawater if there are 1.50^17 atoms of gold in the sample?
*April 25, 2013 by Tina*

**math**

To find the weight of the gold in a 22 karat gold object, multiply the object's weight by 0.917. To find the weight of the gold in an 18 karat gold object, multiply the object's weight by 0.583. A 22 karat gold statue and a 14 karat gold statue both weigh 73.5 ounces. Which ...
*October 22, 2014 by Kymy*

**chemistry**

It is observed that when solid copper is added to a solution containing gold ions, the copper dissolves and the gold precipitates. Similarly, almost every other metal will displace gold from solutions of gold salts. a. Do these results mean that the gold ion is an unusually ...
*October 30, 2013 by Anonymous*

**Math**

If 241.5 grams of gold has a volume of 12.5 cubic centimeters, what is the density of gold?
*January 8, 2013 by Camma Breezy*

**physical sciences**

If 57.9 grams of gold has a volume of 3 cubic centimeters what is the density of gold in g/ cm3,?
*April 26, 2012 by kl*

**Physical Science**

Suppose an all good crown has mass m=3800 grams. Gold has a density of 19 grams/ cm^3. What is the volume of water displaced by a gold crown (in cm^3)? Please help :)
*September 17, 2014 by Belle*

**geography**

1)give two properties of gold which makes it an economically valuable mineral 2)what is the difference between gold and an ordinary rock? 3)what is difference between gold mine and gold prospect?
*July 28, 2010 by kila*

**word problem**

To find the weight of the gold in a 22 karat gold object, multiply the object's weight by 0.917. To find the weight of the gold in an 18 karat gold object, multiply the object's weight by 0.583. A 22 karat gold statue and a 14 karat gold statue both weigh 73.5 ounces. Which ...
*October 21, 2014 by Kymy*

**math**

To find the weight of the gold in a 22 karat gold object, multiply the object's weight by 0.917. To find the weight of the gold in an 18 karat gold object, multiply the object's weight by 0.583. A 22 karat gold statue and a 14 karat gold statue both weigh 73.5 ounces. Which ...
*October 21, 2014 by Kymy*

**Algebra 1**

To find the weight of the gold in a 22 karat gold object, multiply the objects weight by 0.917. To find the weight of the gold in an 18 karat gold object, multiply the objects weight by 0.583. A 22 karat gold statue and a 14 karat gold statue both weigh 73.5 ounces. Which one ...
*October 13, 2014 by Ms. Liz*

**chem**

A gold nugget weighs 65.0 g. How many moles of gold are in the nugget? I got 12800 moles is this right?
*October 10, 2010 by Chris*

**Chemistry**

You observe that when copper is added to a soltion containing gold ions, the copper dissolves and the gold precipitates. Similarly, almost every other metal will displace gold from solutions of gold salts. a) Do these observations mean that gold ion is a unusally good ...
*October 20, 2011 by Dani*

**chemistry**

silver has density of 10.5 g/cm3 and gold has a density of 193.g/cm3 which liquid is denser silver and gold are liquids? That's news to me. You're given the ratios for density, which ratio is greater 10.5gm/cm^3 or 193gm/cm^3? It appears gold is over 18 times as dense as ...
*September 10, 2006 by delonte*

**math**

To find the weight of the gold in a 22 karat gold object, multiply the object's weight by 0.917. To find the weight of the gold in an 18 karat gold object, multiply the object's weight by 0.583. A 22 karat gold statue and a 14 karat gold statue both weigh 73.5 ounces. Which ...
*October 21, 2014 by Kymy*

**MBA Practice problems**

you are presently involved with a project to establish the cost of the gold presently used in the production of 1000 computer chips per month. each chip uses two grams of 20 ct gold with the remaining portion of a metal whose cost is insignificant. what is the monthly cost of ...
*October 14, 2011 by tina *

**Chemistry**

An atom of gold has a mass of 3.271 times 10^-22g. How many atoms of gold are in 5.00g of gold?
*February 21, 2014 by Kelsi*

**Chemistry**

A chemist wants to extract the gold from 15.0g of gold(II) chloride dihydrate, AuCl3 â€¢ 2H20, What mass of gold could be obtained from this sample?
*April 5, 2011 by Anonymous*

**Science**

he specific heat of gold is 0.031 cal/g°C. Fifty grams of gold will require ____ calories to raise the temperature 1°C. 3.1 6.2 1.55 50
*January 6, 2014 by Garrett*

**science**

how does adding copper to gold change the economic value of the gold and the properties of the gold?
*November 7, 2009 by logan*

**chem**

gold hasa density of 19 g/cm^3 if an 18 inch necklace is made of pure gold how much would it weigh in grams if it is 1 cm wide and 1 mm thick
*March 16, 2011 by hillary*

**CHEMISTRYYYY HELP**

A sample of gold ore contains 22.0 g of gold metal per 100kg of ore. If gold has a market value of $350.00 per oz., what mass of ore, in tons, must be refined to get one million dollars worth of pure gold?
*September 26, 2011 by Andrea*

**Chemistry**

The density of pure gold is 19.3 g/centimeter cube. A quantity of what appears to be gold has a mass of 465 grams and a volume of 26.5 mL. Is the substance likely to be pure gold? please tell me how you got your answer. Thanks! density = mass/volume You know mass is 465 grams...
*February 15, 2007 by Sarah*

**Chemistry**

Fool's gold is not gold at all but only lead IV sulfide. If you have 751.0 grams of lead how many grams of fool's gold can you make? Ans: Pb+2S->PbS2 Given * (1/amu of given) * (mol of find/mol of given) * (amu of find/1mol)
*November 18, 2012 by Maria*

**social studies**

why does gold sink to the bottom of the pan? other than prospectors who else made money from the gold rush? why did some people in boomtowns become wealthy without mining for gold?
*April 17, 2012 by Celest*

**physical science**

A gold bar has a mass of 250 grams and is heated from 25 degrees Celsius to 55 degrees Celsius. How much heat did the gold bar absorb? The specific heat of gold is 0.13J/g*degrees C.
*November 1, 2014 by staci*

**Chemistry**

Alicia's cheapskate boyfriend gave her a ring he claims is 24 carat gold. Alicia is skeptical. After chem class the next day she measures the mass of the ring, finds the volume of the ring by water displacement, and then calculates the density of the ring. should she treasure ...
*September 13, 2010 by Patrice*

**Chemistry**

How many moles of gold atoms do 3.45 x 10^24 gold atoms constitute. This is what I did 3.45 x 10^24 x 1 / 6.022 x 10^23 = 573 am I right
*September 25, 2011 by Monique*

**physics**

The British Sovereign coin is an alloy of gold and copper having a total mass of 7.988 g and is 22-karat gold. (a) Find the mass of gold in kg using that # of karats = 24 x (mass of gold)/(total mass). (b) Calculate the volumes of gold and copper used to manufacture the coin...
*February 4, 2013 by anon*

**physics**

What amount of heat is required to increase the temperature of 75.0 grams of gold from 150°C to 250°C? The specific heat of gold is 0.13 J/g°C.
*March 19, 2012 by Anonymous*

**science**

Gold has sold for $523/ounce. How many milligrams of gold could you buy for one cent( 16.0 ounce = 454 grams)
*August 31, 2013 by Chenelle*

**algebra**

Joe has a ring weighing 15 grams made of an alloy of 20 silver and the rest gold. He decides to melt down the rings and add enough silver to reduce the gold content to 67 . How many grams of silver should he add?
*September 27, 2011 by Amy Love*

**math**

An atom of gold has a mass of approximately 3.25 × 10−22 grams. What is the mass of 7000 atoms of gold? Express your answer in scientific notation
*November 12, 2014 by jahron*

**PROBLEM SOLVING IN MATHEMATICS**

you have 13 bags of gold wins. out of 13 bags gold coins, there is one bag gold coins lighter. assume that one real gold coins is 10g and the fake is 9g. now, you are given a electronic beam balance. find the most minimum ways to figure out which bag of gold coins is lighter.
*September 30, 2011 by alya*

**PROBLEM SOLVING IN MATHEMATICS**

you have 13 bags of gold wins. out of 13 bags gold coins, there is one bag gold coins lighter. assume that one real gold coins is 10g and the fake is 9g. now, you are given a electronic beam balance. find the most minimum ways to figure out which bag of gold coins is lighter.
*October 1, 2011 by alya*

**geometry**

PLEASE HELP ME! i have this homework due tomorrow and i only have 1 question left and am sooo desperate for an answer: The diameter of the Dome of the Rock in Jerusalem is 20m. If it is plated with gold that is 5cm thick, find the cost of plating the dome in gold given that ...
*January 27, 2011 by CJ*

**Chemistry**

If given: A 1.4470g sample of an oxide of gold was reduced with ethane to 1.2900g of gold metal. What is the simple formula of the original gold oxide?
*September 18, 2007 by Cat*

**physics**

4. What is the electric potential at the surface of a gold atom’s nucleus, which is assumed to be spherical? The radius of a gold nucleus is 6.6 x 10-15 meters and the atomic number of gold is 79.
*March 13, 2011 by lol*

**physics**

a piece of gold aluminuim alloy weighs 100g in air and 80g in water.what is the weight of the gold in the alloy if the relative density of gold is 19.3 and that of aluminium is 2.5
*May 21, 2010 by onda*

**Physics(class) /Math (problem)**

Joe has a ring weighing 16 grams made of an alloy of 20% silver and the rest gold. He decides to melt down the rings and add enough silver to reduce the gold content to 69% . How many grams of silver should he add?
*October 4, 2012 by Toulouse*

**physics honors**

Suppose that pure gold was to be made into a very long, thin wire for high-end stereo systems. (Gold is often used because it does not oxidize so it makes very good electrical contacts). If the gold wire was to have a radius of 0.01 cm, how long of a wire could you make from ...
*May 31, 2012 by thomas*

**science**

gold has a specific heat of 0.130j/g. degrees celcuis if 195 joules of heat are added to 15 grans of gold homw much does the tempreature of the gold change
*March 1, 2011 by nikita*

**chemistry**

A 14 karat gold alloy contains 58% m/m gold. How much of this alloy can a jeweler make using 50.0 g of pure gold?
*December 15, 2014 by Bonnie*

**Math Concentration**

Joe has a ring weighing 10 grams made of an alloy of 13% silver and the rest gold. He decides to melt down the rings and add enough silver to reduce the gold content to 69%. How many grams of silver should he add? My set up is: 10 (.13 + .87) = 10 (.13 + X + .69) I'm not sure ...
*June 26, 2011 by missy*

**Chemistry 101**

if 95j of heat is added to a pure gold coin with a mass of 16 grams, what is its temperature change? Specific heat capacity of gold is 0.128 j/g degrees C.
*February 24, 2012 by Haley*

**CHEM MOLES !@@!**

Mole Calculation Worksheet 1) How many moles are in 15 grams of lithium? 2) How many grams are in 2.4 moles of sulfur? 3) How many moles are in 22 grams of argon? 4) How many grams are in 88.1 moles of magnesium? 5) How many moles are in 2.3 grams of phosphorus? 6) How many ...
*December 16, 2014 by Theresa *

**chemistry**

Its general formula is BaTi(SiO3)3.If a 15-carat stone were pure BaTi(SiO3)3, how many moles of silicon would it contain? (There are exactly 5 carats per gram.)
*November 29, 2012 by linda*

**chemistry**

what is the minimum of amount of KCN in moles needed to extract 29 grams of gold
*November 5, 2012 by Anonymous*

**chemistry**

Treatment of gold metal with BrF3 and KF produces Br2 and KAuF4, a salt of gold. Find the mass of the gold salt that forms when a 73.0 -g mixture of equal masses of all three reactants is prepared.
*November 2, 2010 by john*

**Physics**

A gold prospector finds a solid rock that is composed solely of quartz and gold. The mass and volume of the rock are, respectively, 14.8 kg and 1.89 × 10-3 m3. The density of gold is 19 300 kg/m3, and the density of quartz is 2660 kg/m3. Find the mass of the gold in the rock.
*November 22, 2010 by Mike*

**physics**

A gold prospector finds a solid rock that is composed solely of quartz and gold. The mass and volume of the rock are, respectively, 13.3 kg and 3.56 × 10-3 m3. The density of gold is 19 300 kg/m3, and the density of quartz is 2660 kg/m3. Find the mass of the gold in the rock.
*March 10, 2013 by chel*

**Physics**

The "karat" is a dimensionless unit that is used to indicate the proportion of gold in a gold-containing alloy. An alloy that is one karat gold contains a weight of pure gold that is one part in twenty-four. What is the volume of gold in a 20.0 karat gold necklace whose weight...
*April 5, 2007 by Mary*

**Chemistry**

A 15g sample of what appears to be gold that was heated from 22 degrees C to 39 degrees C, required 26.3 J of energy. If the specific heat of gold is .129 J/(g x degrees C), is the metal pure gold? Defend your answer with calculations.
*May 28, 2012 by Olivia *

**Physics**

Hi guys, i get stuck with this question. Pls help. thanks so much. I know there are 4 atoms in FCC. A gold particle was measured to be spherical in shape with a radius of 400 nm. Note that assuming the gold atoms are small spheres that form the gold particle by packing ...
*February 23, 2010 by kat*

**science**

Hi guys, i get stuck with this question. Pls help. thanks so much. I know there are 4 atoms in FCC. A gold particle was measured to be spherical in shape with a radius of 400 nm. Note that assuming the gold atoms are small spheres that form the gold particle by packing ...
*February 23, 2010 by kat*

**chemistry**

Hi guys, i get stuck with this question. Pls help. thanks so much. I know there are 4 atoms in FCC. A gold particle was measured to be spherical in shape with a radius of 400 nm. Note that assuming the gold atoms are small spheres that form the gold particle by packing ...
*February 23, 2010 by kat*

**physics**

gold and silver have densities of 19.3 and 10.5 grams per cubic centimer, respectively. If you have eual volumes of each, which one will have the larger mass? I am thinking the gold. how do i prove it? Thank you
*April 24, 2011 by Loui*

**math**

With 20 pirates and 1000 pieces of gold: Captain Jack gets 113 gold coins (151 if you count the 38 everyone in the crew gets) First Mate gets 66 gold coins (104 if you count the 38 coins everyone in the crew gets) The Crew gets 38 gold coins each The PBA gets 7 gold coins. ...
*October 10, 2014 by John W.*

**Algebra 1**

A jeweler buys gold jewelry and resells the gold to a refinery. The jeweler buys gold for $1,235.55 per ounce, and then resells it for $1,376.44 per ounce. How much profit does the jeweler make from buying and reselling 73.5 ounces of gold? Please help answer question thanks
*October 13, 2014 by Ms. Liz*

**Chemistry**

A chemist wants to extract the gold from 15.0g of gold(II) chloride dihydrate, AuCl3 x 2H20, What mass of gold could be obtained from this sample? Also how would you find the molar mass of of 2H20 with the coefficient 2 in front?
*April 5, 2011 by Anonymous*

**chemistry**

A 4.90 g nugget of pure gold absorbed 255 J of heat. What was the final temperature of the gold if the initial temperature was 24.0°C? The specific heat of gold is 0.129 J/(g·°C).
*March 24, 2010 by pjl*

**physics**

can some one explain this Assuming a gram of gold costs approximately $36, how many cubic centimeters of gold can you buy with a twenty dollar bill if the density of gold is 19320 kg / m3 ? a) 0.029 cm3 b) 2.9 x 10-6 cm3 c) 0.56 cm3 d) 0.04 cm3
*January 20, 2011 by Anonymous*

**chemistry**

To extract gold from its ore, the ore is treated with sodium cyanide solution in the presence of oxygen and water. 4 Au(s) + 8 NaCN(aq) + O2(g) + 2 H2O(l) 4 NaAu(CN)2(aq) + 4 NaOH(aq) Determine the mass of gold that can be extracted if 27.4 g sodium cyanide is used. If the ...
*February 7, 2010 by tg*

**Chemistry**

To extract gold from its ore, the ore is treated with sodium cyanide solution in the presence of oxygen and water. 4 Au(s) + 8 NaCN(aq) + O2(g) + 2 H2O(l) 4 NaAu(CN)2(aq) + 4 NaOH(aq) Determine the mass of gold that can be extracted if 27.4 g sodium cyanide is used. If the ...
*February 9, 2010 by tdb*

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