1. sciencs

    what is denser, 1 grams of gold or 1 kilograms of copper? why?

    asked by chloe on July 25, 2011
  2. 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

    asked by Anonymous on August 25, 2013
  3. Physics

    The density of copper is 9.8 kilograms per meter cube and the density of gold is 1.9 kilograms per meter cube. When two wires of these metals are held under the same tension, the wave speed in the gold is found to be half that in the copper wire. What is

    asked by Samuel on October 8, 2016
  4. maths

    A gold density is 19 times greater than the water and for copper it is 9 times. At what ratio you can mix gold and copper to get 15 times denser than water. Ans: 3 : 2

    asked by avinash on October 21, 2011
  5. Chemistry

    Copper and lead had different densities. Sketch a diagram at the particular nature of matter level showing the atoms of a small cross section of copper and lead. Use this diagram to explain why lead is denser than copper. I couldn't find any pictures or

    asked by Anonymous on June 29, 2015
  6. Chemistry

    A street merchant is trying to sell you a 14 karat (24 karat is 100% pure) bracelet for $450. The gold is alloyed with copper. Before buying the item, you weigh it to be 110 grams and you also measure its water displacement as 7.59 mL. What is the %

    asked by Kid on January 28, 2018
  7. chemistry

    Follow the steps provided in the simulation to add water to the graduated cylinder, select one of the three samples (copper, silver, or gold), set its mass to the values given in the statements below, find its volume, and calculate its density. To save

    asked by fatimah on September 21, 2011
  8. 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

    asked by Anonymous on October 30, 2013
  9. 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

    asked by Dani on October 20, 2011
  10. 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

    asked by delonte on September 10, 2006
  11. science

    A neckless weighing 50 g in air, but it wheighs 46 g in water . Assume copper is mixed with gold to prepare the neckless. Find out how much of copper is present in it?(specific gravity of gold is 20 and that of copper is 10)

    asked by arun on May 5, 2010
  12. 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

    asked by anon on February 4, 2013
  13. 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

    asked by Laur on January 26, 2011
  14. Physics

    An alloy of copper and gold displaces 1.935 cm^3 of water. It has a mass of 33.44g. If gold has a density of 19.3g/cm^3 and copper has a density of 8.9g/cm^3, what is the percent of gold by mass in the object?

    asked by Anonymous on December 11, 2007
  15. physics

    n alloy of copper and gold displaces 1.935 cm^3 of water. It has a mass of 33.44g. If gold has a density of 19.3g/cm^3 and copper has a density of 8.9g/cm^3, what is the percent of gold by mass in the objec

    asked by Anonymous on December 11, 2007
  16. 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

    asked by Jay on January 30, 2011
  17. 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

    asked by Aline on April 23, 2009
  18. 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)

    asked by ben on December 11, 2012
  19. science

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

    asked by logan on November 7, 2009
  20. Physics

    The density of copper is 9.8×10^3 and the density of gold is1.9×10^4. When the two wires of these two metals are held under the same tension the speed in the gold wire is found to be half of that of the copper. What is the ratio of the diameters of the

    asked by Frank on October 7, 2016
  21. College 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 50 grams of an alloy that is 68% gold? amount of 30% gold ______grams amount of 80% gold ______grams

    asked by Jordan on April 10, 2017
  22. 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

    asked by Jer on November 27, 2014
  23. 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

    asked by Tritanianna on November 11, 2009
  24. chemistry

    A 2.00 gram sample of Copper (II) acetate produced 2.48 grams of a Copper (II) Formate Hydrate. After heating the sample the final mass of the Copper (II) Formate was 1.69 grams. What was the degree of hydration for the Copper (II) Formate?

    asked by Jesus on October 6, 2014
  25. 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

    asked by chad on October 20, 2010
  26. science

    Which object is denser, 100cm cubed of wood that weights 61 grams, or 10 grams of water that has a volume of 10ml?

    asked by gg on December 20, 2011
  27. chemistry

    How many grams silver (Ag) is added to 13 grams gold to produce 85% gold (Au) alloy? Can someone please give me the derived formula to be used? I had managed to solve it though I'm not quite sure if it's correct. i got 73.67g Ag, can someone please correct

    asked by Epinephrine on October 7, 2016
  28. chemistry

    Copper(II) sulfide reacts with oxygen to produce copper (II) oxide plus sulfur dioxide. Suppose you start this reaction with 50.0 grams of copper(II) sulfide and 50.0 grams of oxygen and you actually produce 33.5 grams of copper(II) oxide. Calculate the

    asked by steven on March 5, 2014
  29. college chemistry

    Copper(II) sulfide reacts with oxygen to produce copper (II) oxide plus sulfur dioxide. Suppose you start this reaction with 50.0 grams of copper(II) sulfide and 50.0 grams of oxygen and you actually produce 33.5 grams of copper(II) oxide. Calculate the

    asked by steven on March 5, 2014
  30. algebra

    British sterling silver is a copper-silver alloy that is 7.5% copper by weight. How many grams of pure copper and how many grams of British sterling silver should be used to prepare 320 grams of a copper-silver alloy that is 20% copper by weight? (Round

    asked by Anonymous on January 21, 2014
  31. algebra

    A chemist has x grams of an alloy that is 20% silver and 10% gold, and y grams of an alloy that is 25% silver and 30% gold. Express the number of grams of gold in the two allows in terms of x and y.

    asked by jadine on January 5, 2015
  32. 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

    asked by James on March 17, 2013
  33. Algebra

    how much of a alloy with 30 percent copper is needed to make 6 kilograms of 21 per cent copper

    asked by Chris mason on October 27, 2018
  34. 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%?

    asked by Lyanne on December 11, 2010
  35. 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

    asked by Jerome on January 27, 2011
  36. Math

    British sterling silver is a copper-silver alloy that is 7.5% copper by weight. How many grams of pure copper and how many grams of British sterling silver should be used to prepare 200 grams of a copper-silver alloy that is 10% copper by weight? (round to

    asked by Help Please! on December 7, 2015
  37. 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.

    asked by JOHN DUNN on May 7, 2014
  38. math

    Eight sided dice can be described as two square based pyramids stuck together at the bases. Their faces are equilateral triangles. If the edge of one die is 2mm, find the difference in materials cost between a solid gold die and a “gold” painted

    asked by Cindy on April 20, 2017
  39. Chemistry

    A cublic meter of ocean water contains 6x10^-5 g of gold. If the total mass of the water in Earth's oceans is 4x10^20 kg, how many kilograms of gold are distributed throughout the ocean? (Assume that the density of seawater is 1 g/cm3.) How many literes of

    asked by Anonymous on June 5, 2012
  40. Algebra/Math

    Can you show work por favor? :) A metalworker has a metal alloy that is 20% copper and another alloy that is 60% copper. How many kilograms of each alloy should be combined to create 80 kg of a 53% copper alloy?

    asked by Anon on February 27, 2013
  41. Chemistry

    How come lead is denser than copper though more copper atoms can fit into a same size cube than lead atoms can?

    asked by Joey on June 29, 2015
  42. Chemistry

    A student was isolating copper metal from a copper salt. If the student started with 1.255g of copper (II) sulfate how many grams of copper solid would you expect them to recover?

    asked by Caroline on December 7, 2014
  43. Chemistry

    How many grams silver is added to 13 grams gold to produce 85% gold alloy?

    asked by Anonymous on September 25, 2015
  44. Chemistry

    How many grams silver is added to 13 grams gold to produce 85% gold alloy?

    asked by Brenna on September 25, 2015
  45. science

    what is the karat count of gold in a bracelet that contains 15 grams of gold and 5 grams of silver

    asked by demarco on May 13, 2008
  46. Chemistry

    How many grams silver is added to 13 grams gold to produce 85% gold alloy?

    asked by Anonymous on September 25, 2015
  47. Chemistry

    The coinage metals -- copper, silver, and gold -- crystallize in a cubic closest packed structure. Use the density of gold (19.3 g/cm3) and its molar mass (197 g/mol) to calculate an approximate atomic radius for gold. Work So Far:

    asked by Caroline on February 3, 2015
  48. 7th grade

    If a nickel contains 3.0 gram of copper and 1.2 gram of nickel How many kilograms of copper must be combines with 500 kilograms of nickel to make nickel coins?

    asked by Anonymous on March 27, 2010
  49. Math

    If a nickel contains 3.9 gram of copper and 1.2 gram of nickel How many kilograms of copper must be combines with 500 kilograms of nickel to make nickel coins?

    asked by Heather on March 27, 2010
  50. algebra

    Copper weighing 4480 kilograms has a volume of 0.5 cubic meters. What is the density of copper? I started with 4480kg/0.5m and got 8960. Is this correct and what is the unit at the end?

    asked by 1carriebear on August 27, 2011
  51. math

    heather's puppy has a mass of 1000 grams. what is the mass of heathers puppy in kilograms? 1000 kilograms 100 kilograms 10 kilograms 1 kilogram

    asked by yes on March 14, 2012
  52. integrated physics and chemistry

    what is the main ingredient in 22-karet gold? is it copper,tin,gold,or steel?

    asked by logan on November 7, 2009
  53. chem1151

    If 2.68 grams of Copper was recovered and you started with 8.94 grams of Copper(II)chloride,then what is the percent yield of the reaction?

    asked by linda on March 8, 2012
  54. Math

    Indicate whether the mass of the following objects could best be measured in grams or kilograms: An elementary school student It is kilograms right?

    asked by Anonymous on December 2, 2009
  55. physics

    A piece of copper of mass 40 grams at 20 degrees Celsius is placed in a copper calorimeter of mass 60 grams containing 50 grams of water at 10 degrees Celsius .ignoring heat losses,what will be the final steady temperature after stirring?(specific heat

    asked by samuel on May 29, 2016
  56. Chemistry/stoichiometry

    For the reaction shown, calculate how many moles of NO2 form when each amount of reactant completely reacts. 2N2O5g = 4NO2g+O2g I am assuming that the first question must be converted to grams and the second question must be converted to kilograms I just

    asked by Dale on October 26, 2012
  57. History

    Drag the word to the description it matches. gold, salt, ivory, copper Horses goods that originated from Mali ivory,salt goods that Mali obtained through trade gold,copper Please help Ms. Sue

    asked by Alaia on February 8, 2019
  58. chemistry

    Nitrogen gas can be prepared by passing gaseous ammonia over solid copper (II) oxide at high temperature. The other products of the reaction are solid copper and water vapor. If a sample containing 20.3 g of NH3 is reacted with 95.8 g of copper oxide 1.

    asked by casey on November 8, 2016
  59. chemistry

    how many grams of copper is displaced from copper sulphate solution by adding 27 grams of aluminium

    asked by amish on June 27, 2013
  60. chemistry

    If there are 2.0 grams in 1 meter of copper wire, how many centimeters would be needed to provide .28 grams of copper?

    asked by Julie on September 2, 2011
  61. 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 :)

    asked by Belle on September 17, 2014
  62. chemistry II

    What is most likely to oxidize out of the following transition metal:? Platinum, copper, gold, palladium, silver? i believe its copper but check and see if i am right

    asked by markr on April 29, 2007
  63. 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

    asked by Rick on June 1, 2013
  64. chemistry

    How many grams of copper is deposited from an aqueous solution of copper sulfate, (CuSO4(aq)), by passing one mole of electrons into a copper plating cell? A. 254 g B. 127 g C. 63.5 g D. 42.3 g E. 31.8 g

    asked by Rapinder S. on May 24, 2008
  65. chemistry

    How many grams of copper is deposited from an aqueous solution of copper sulfate, (CuSO4(aq)), by passing one mole of electrons into a copper plating cell? A. 254g B. 127g D. 42.3g E. 31.8g

    asked by Mable on May 24, 2008
  66. Chemistry

    A 45.4 grams of a gold metal sample was heated with the amount of energy of 228 J. Which of the following would the most plausible temperature change of the gold sample? The specific heat of gold is 0.131 J/g.oC. 12.8 oC to 38.3 oC 24.4 oC to 81.6 oC 23.8

    asked by Heather on February 28, 2015
  67. chemistry

    Q1.A compound of copper and sulphur is 65.43percent copper by mass.how many grams of copper can be obtained from 249g of this compound?and how many grams of sulphur remain?

    asked by watson on July 2, 2011
  68. Chemistry

    what is my percent yield if i had 1.46 grams of copper to start with and ended with 2. 47 grams of copper?

    asked by megan on June 14, 2011
  69. physics

    A force of 1.35 newtons is required to accelerate a book by 1.5 meters/second2 along a frictionless surface. What is the mass of the book? 0.45 kilograms 0.90 kilograms 1.35 kilograms 1.5 kilograms 1.8 kilograms

    asked by jerome rice on October 27, 2014
  70. Chemistry

    Part 1 : a.) How many grams of Hydrogen will be contained in a 100.000 g sample of magnesium hydroxide.? c.) How many grams of nitrogen will be contained in a 120.0 g sample of calcium cyanide? ________________________________________ Part 3: d.) How many

    asked by Amber Deana B. on January 11, 2016
  71. 6 grade Math

    241.5 grams of gold has a volume of 12.5 cubic cm. what is the volume of 193.2 grams of gold How do you set this problem up?

    asked by Kj on November 30, 2015
  72. chemistry

    consider the reaction between copper metal and chlorine gas producing solid copper(1) chloride. when 16.2g of copper is reacted in an excess of chlorine, how many grams of copper(1) chloride will be produced

    asked by janice on April 28, 2012
  73. algebra

    British sterling silver is a copper-silver alloy that is 7.5% copper by weight. How many grams of pure copper and how many grams of British sterling silver should be used to prepare 170 grams of a copper-silver alloy that is 16% copper by weight?

    asked by aaaa on January 26, 2011
  74. chemistry

    Copper (II) flouride contains 37.42% F by mass. Use this percentage to calculate the mass of flourine (in grams) contained in 35.6 g of copper (II)fluoride. --- How many grams of Cl are present in 55g of CFCl3?

    asked by Anonymous on March 26, 2008
  75. math

    A metal worker has a metal alloy that 30% copper and another one is 55% copper. how many kilograms of each alloy should the metalworker combine to make 50kg of a 50% copper alloy?

    asked by Anon on March 25, 2016
  76. math

    A metal worker has a metal alloy that 15% copper and another one is 70% copper. how many kilograms of each alloy should the metalworker combine to make 120kg of a 48% copper alloy?

    asked by Anon on March 25, 2016
  77. Chemistry

    A reaction that has been calculated to produce 60.0 grams of Copper (II) Chloride actually produces 50.0 grams of Copper (II) Chloride. What is the percent yield? A 0.833% B 96.1% C 83.8% D 120%

    asked by Jarel on May 24, 2012
  78. Chemistry

    A galvanic cell is connected to a small light bulb for 40.0 minutes. The electrodes are copper and silver and the copper electrode is immersed in a solution of copper sulfate. During that time, the average current drawn by the bulb is 0.12 A. a. What is

    asked by Wade on May 23, 2018
  79. 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

    asked by Theresa on December 16, 2014
  80. chemistry

    Answers for copper has a density of 8.92g/cm3 and nickel has a density of 8.90 . which one is denser

    asked by Anonymous on November 4, 2010
  81. math

    Todd is moving sand from his driveway to the backyard. The wheelbarrow weighs 30 kilograms when it is full of sand. When it is empty, it weighs 12 kilograms. How many grams of sand did Todd move if he filled and emptied the wheelbarrow five times?

    asked by mi on May 2, 2013
  82. 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)

    asked by Maria on November 18, 2012
  83. 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

    asked by missy on June 26, 2011
  84. 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?

    asked by Amy Love on September 27, 2011
  85. 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?

    asked by Toulouse on October 4, 2012
  86. Algebra

    How much 20% and 40% copper alloy should be mixed to yield 500 kilograms of 25% copper alloy

    asked by Jenny on April 29, 2011
  87. science

    If 14.0 kilograms of Al2O3(s), 57.4 kilograms of NaOh(l), and 57.4 kilograms of HF(g) react completely, how many kilograms of cryolite will be produced?

    asked by Chase on March 6, 2012
  88. Chemistry

    If 14.0 kilograms of Al2O3(s), 57.4 kilograms of NaOh(l), and 57.4 kilograms of HF(g) react completely, how many kilograms of cryolite will be produced?

    asked by John on March 6, 2012
  89. Chemistry

    If 16.3 kilograms of Al2O3(s), 60.4 kilograms of NaOH(l), and 60.4 kilograms of HF(g) react completely, how many kilograms of cryolite will be produced?

    asked by Harley on October 23, 2011
  90. chemistry

    You are a chemist requested to review and analyse certain debris found on thebottom of aboot found in a crime scene. The debris contains metal fragments. If you identify the metal fragments---it will help the detctive identify the locations traveled by the

    asked by Jimmy on February 26, 2012
  91. 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. !

    asked by Nicole on July 26, 2010
  92. physical sciences

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

    asked by kl on April 26, 2012
  93. Math

    If 241.5 grams of gold has a volume of 12.5 cubic centimeters, what is the density of gold?

    asked by Camma Breezy on January 8, 2013
  94. Flotation is widely used for processing all kinds

    In most instances, flotation is used for processing sulfide auriferous ores whose flotability is quite high and the effect is most notable. By flotation, the gold can be enriched to sulfide ore concentrate as much as possible and the abandoned tailings can

    asked by jiandan on July 22, 2012
  95. Chem

    copper sulfate reacts with sodium hydroxide producing copper hydroxide and sodium sulfate.. If sodium hydroxide is the limiting agent how many grams of copper hydroxide should precipitate out?{There are 634.44 g of copper sulfate and 240 grams of sodium

    asked by Steve on October 3, 2015
  96. 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

    asked by hillary on March 16, 2011
  97. 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

    asked by tina on October 14, 2011
  98. 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

    asked by Garrett on January 6, 2014
  99. 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

    asked by Loui on April 24, 2011
  100. technological institute of the philippines

    seventu grams of a piece of iron at 95 degree celsius is dropped into a copper calorimeter containing 150 grams of water at 20 degree celsius. the mass of copper calorimeter is 90 grams the final temperature of the mixture is 25 degree celsius. determine

    asked by Anonymous on June 26, 2013