# How many ounces of a 19% copper alloy metal must be added to 42% ounces of a 40% copper alloy metal to produce a metal which is 31% copper alloy

33,025 results

1. ### algebra

How many ounces of a 19% copper alloy metal must be added to 42% ounces of a 40% copper alloy metal to produce a metal which is 31% copper alloy
2. ### math

Anne and Nancy use a metal alloy that is 23.5% copper to make jewelry. How many ounces of a 21% alloy must be mixed with a 30% alloy to form 108 ounces of the desired alloy?
3. ### algebra

Solve the problem. Anne and Nancy use a metal alloy that is 24.9% copper to make jewelry. How many ounces of a 20% alloy must be mixed with a 27% alloy to form 100 ounces of the desired alloy?
4. ### College Pre Calculus

anne and nancy use a metal alloy that is 19.3% copper to make jewelry. how many ounces of a 19% alloy must be mixed with a 20% alloy to form 110 ounces of the desired alloy?

Solve the problem. Anne and Nancy use a metal alloy that is 24.9% copper to make jewelry. How many ounces of a 20% alloy must be mixed with a 27% alloy to form 100 ounces of the desired alloy?
6. ### 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?
7. ### 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?
8. ### 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?
9. ### Algebra

solve linear equation-an alloy of metal is 25% copper. Another alloy is 50% copper. how much of each alloy should be used to make 1000 grams of an alloy that is 45% copper
10. ### maths

In 60 ounces of alloy for watch cases there are 20 ounces of gold.how much copper must be added to the alloy so that a watch case weighing 4 ounces,made from the new alloy,will contain 1 ounce of gold.......answer is 20 ounces
11. ### Math

A metalworker has a metal alloy that is 25% copper and another alloy that is 65% copper. How many kilograms of each alloy should the metalworker combine to create 50 kg of a 57% copper alloy?
12. ### math

a metalworker has a metal alloy thay is 25% copper and another alloy that is 60% copper. how many kilograms of each alloy should the metalworker combine to create 90kg of a 53% coppet alloy
13. ### Geometry

An alloy of copper is 10% copper and weighs 25 pounds. A second alloy is 18% copper. How much (to the nearest tenth lb.) of the second alloy must be added to the first alloy to get a 13% mixture.
14. ### math

An alloy of copper is 10% copper and weighs 25 pounds. A second alloy is 18% copper. How much (to the nearest tenth lb.) of the second alloy must be added to the first alloy to get a 13% mixture.

An alloy of metals is 25% copper .Another alloy is 50% copper. How much of each alloy should be used to make 1000grams of an alloy that is 45% copper?
16. ### math

An alloy of metals is 25% copper. Another alloy is 50% copper. How much of each alloy should be used to make 1000 grams of an alloy that is 45% copper
17. ### math

an alloy of metals is 20% copper. another alloy is 50% copper.how much of each should be used to make 1000 gram of an alloy that is 45% copper?
18. ### Math

an alloy of metals is 20% copper. another alloy is 70% copper.how much of each should be used to make 80 gram of an alloy that is 50% copper?
19. ### Algebra

an alloy of metals is 20% copper. another alloy is 70% copper.how much of each should be used to make 80 gram of an alloy that is 50% copper?
20. ### Math

If an alloy requires copper, nickel, and zinc in a ratio of 12:5:3, how many kilograms of each metal are needed to make 5 kg of the alloy?
21. ### Math

An alloy is composed of nickel, zinc, and copper in a ratio of 3:4:13. How many kilograms of each metal are needed to make 4 kg of this alloy?
22. ### Math

There are two alloys consisting of zinc, copper and tin. The first alloy contains 25% zinc and the second alloy contains 50% copper. The percentage of tin in the first alloy is twice that in the second alloy. 200 kg of the first alloy and 300 kg of the second are melted ...
23. ### chem

An experimental alloy contained by copper and tantalum. 3.7950 g of the alloy was dissolved and analyzed gravimetrically. The copper was precipitated and weighed as CuO, a mass of 0.1805 g was obtained. Calculate the %w/w Cu in the alloy. [Answer in 2 decimal places]
24. ### math

How many ounces of an alloy containing 30% gold on the world market must be added to 10 ounces of an alloy containing 5% to produce an alloy containing 20% gold?
25. ### math

how many 0z of a metal containing 90% copper must be combined with 3 0z of purecopper to form an alloy containing 92% copper?
26. ### Math (Word Problem into formula)

A chemist is studying the properties of a bronze alloy (mixture) of copper and tin. She begins with 6 kg of an alloy that is one sixth tin. Keeping the amount of copper constant, she adds small amounts of tin to the alloy. Letting x be the total amount of tin added, define c(x...
27. ### Algebra

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

A scientist wants to combine two metal alloys into 20 kg of a third alloy which is 60% aluminum. He plans to use one alloy with 45% aluminum content, and a second alloy with 70% aluminum content. How many kilograms of each alloy must be combined?
29. ### Algebra

One alloy of brass is 70% copper and 30% zinc. Another alloy of brass is 40% copper and 60% zinc. How many grams of each of these alloys need to be melted and combined to obtain 300 grams of a brass alloy that is 60% copper and 40% zinc
30. ### algebra

how much copper and how much iron should be added to 100% pounds of an alloy containing 25% copper and 40% iron in order to obtain an alloy containing 30% copper and 50% iron?
31. ### math

The ratio of zinc and copper in an alloy is seven ratio nine if weight of copper in the alloy is eleven point kg then find the weight of zinc in the alloy
32. ### Maths

The ratio of zinc and copper in an alloy is7:9 if the weight of the copper in the alloy is 11.7 kg , find weight of the zinc in the alloy
33. ### math

an alloy is formed by mixing 4.5g copper and 2.8g zinc.how much alloy of similar kind can be formed by using 13.5g copper?
34. ### math

Bronze is an alloy or mixture of the metals copper and tin. The properties of bronze depends on the percentage of copper in the mix. A chemist decides to study the properties of a given alloy of bronze as the proportion of copper is varied. She starts with 7 kg of bronze that ...
35. ### STS

IN AN ALLOY THERE IS 12% OF COPPER. TO GET 69 KG OF COPPER, HOW MUCH ALLOY WILL BE REQUIRED?
36. ### 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 your answers to one ...
37. ### math

The ratio of zinc and copper in an alloy is 7:9. if the weight of copper in the alloy is 11.7 kg, find the weight of zinc in alloy?
38. ### 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 the nearest tenth)
39. ### Chemistry

A piece of copper alloy with a mass of 73.0 g is heated from 23.0◦C to 44.0◦C. In the process, it absorbs 558 J of energy as heat. What is the specific heat of this copper alloy?
40. ### math

A SERVING TRAY MADE OF BRASS WEIGHS 21 OUNCES. THIS BRASS IS AN ALLOY OF 70 PERCENT COPPER AND 30 PERCENT TIN. WHAT IS THE WEIGHT IN COPPER? CHECK MY SOLUTION PLEASE! 70% OF 21 OZ= 30Z
41. ### 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?
42. ### Chemistry

A piece of metal alloy (a solution of metals) is made of gold and silver. It is 20% by mass silver. An irregularly shaped piece of this alloy contains 0.356 lb of gold. When the alloy is added to a graduated cylinder that contains 31.55 mL of alcohol, the level in the cylinder...
43. ### Chemistry

A piece of Copper alloy with a mass of 89.0 g is heated at 30.0 degrees C to 50.0 degrees C. In the process, it absorbs 517 J of energy as heat. What is the specific heat of this copper alloy? and Please do a step by step, I really want to see where I keep going wrong.
44. ### material science

A uniform compressive stress σz is applied to the surface of the metal alloy, and it may be assumed that there is no friction between the alloy and the die. This aluminum alloy has Young’s modulus E=70GPa and a Poisson’s ratio ν=0.33. Determine the value of σz, in MPa, ...
45. ### math

A 200g alloy is made of copper and zinc. the number of copper atoms is 3 times that of zinc, a)calculate the number of copper and zinc atoms. b)calculate the weight of copper and zinc in the alloy. so for a) can i assume that the mol ratio is cu:zn = 3:1? if so, i solved it ...
46. ### chemistry

Determine how much of each product (in g or L) is formed. 2.50g of aluminum metal is placed in a large container of concentrated copper (ll) suflate to produce copper metal.
47. ### Chemistry

True or False? a) wet metallic copper can be rinsed with acetone to help any remaining cation to metal reduction occur b)copper metal is readily oxidized by nitric acid to yield copper(II) nitrate
48. ### material science

A uniform compressive stress σz is applied to the surface of the metal alloy, and it may be assumed that there is no friction between the alloy and the die. This aluminum alloy has Young’s modulus E=70GPa and a Poisson’s ratio ν=0.33. Determine the value of σz, in MPa, ...
49. ### AP Chem

A silver-copper alloy had a mass of 0.1264g. When the alloy was dissolved in nitric acid and the silver precipitated as silver chloride, the precipitate had a mass of 0.1375g. Calculate the percent of silver in the alloy. Show your calculations.
50. ### Chemistry

A silver-copper alloy had a mass of 0.1264g. When the alloy was dissolved in nitric acid and the silver precipitated as silver chloride, the precipitate had a mass of 0.1375g. Calculate the percent of silver in the alloy. So, how would you do this? Is it possible to use moles ...
51. ### Chemistry

ammonia gas reacts with copper (ii) oxide at high temperatures to produce elemental nitrogen, copper metal, and water vapor. Assume that 36.2g ammonia reacts with 180.8 g copper ii oxide. (balanced equation: 2 NH4 (ammonium) (g) + 4 CuO (copper ii oxide) ==> N2 (nitrogen ...
52. ### maths

An alloy is made by using copper and zinc in the ratio of 17:3 how much zinc is used to make 4kg of the alloy?
53. ### Math

An alloy is made up of 25% copper, 30% iron an rest being zinc. Find the mass of zinc in 720 gm of the alloy
54. ### mechanical behaviour of materials

n isotropic alloy contains 5% by volume of a precipitate of radius 10nm. Assume the primary metal is in a simple cubic arrangement. The alloy has a Young's modulus E=70GPa and a Poisson's ratio ν=0.35. If Γ=0.9J/m2 (the energy needed to cut through the precipitate lattice ...
55. ### chemistry

Duralin is an alloy of aluminium containing 4.5% manganese, 3.5% copper, and 0.45% magnesium. How much magnesium is present in a 90 g sample of this alloy? Answer in units of mol
56. ### Chemistry

Duralin is an alloy of aluminium containing 4.5% manganese, 3.5% copper, and 0.45% magnesium. How much magnesium is present in a 32 g sample of this alloy? Answer in units of mol
57. ### Algebra

160 kg of an alloy of copper and aluminium contains 55 percent of aluminium. How much aluminium must be melted into it to make the alloy contain 70 percent of alluminium
58. ### Chemistry

Consider an alloy that is 14.1% copper by mass in tin. Copper makes up what percentage of the atoms in this sample?
59. ### Chemistry

is it easy to distinguish between between the different oxidation states of copper? why? -I answered yes because copper (I) is not as stable as copper (II), and there is a noticeable colour difference You synthesized copper (I) chloride and copper (I) oxide. How do they differ...
60. ### chem

Copper sulfate is a blue solid that is used as an algicide. Solutions of copper sulfate that come in contact with zinc metal such as the surface of galvanized (zinc-plated) steel- undergo the following reaction that forms copper metal on the zinc surface: CuSO4(aq)+Zn(s) ---&...
61. ### chemistry

Sterling silver, an alloy of silver and copper, contains 7.5 percent copper by mass and has a density of 10.3 g/cm3. How many copper atoms are in a sterling silver sphere whose radius is 2.0 in?
62. ### 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?
63. ### chemistry

A 1.2431 -g alloy sample was analyzed for its copper content iodometrically. The alloy was dissolved in hot, concentrated nitric acid and prepared for analysis. The addition of excess KI(aq) solution precipitated the copper as cuprous iodide and liberated elemental iodine ...
64. ### Chemistry

Write the balanced net ionic equations for the reactions of the halogens with copper metal. The halogens are oxidizing agents and the copper metal is a reducing agent. a) Bromine (Br2)+copper metal (Cu) b) Iodine (I2) + copper metal (Cu) Based on your observations and ...
65. ### chemistry

write out the reaction, predicting products where applicable. Zinc metal is added to a solution of copper(II) sulfate. Copper metal is produced and zinc sulfate is left in solution.
66. ### math

Two metal alloys, containing 26% copper and 54% copper are to be mixed together to get 210 oz that is 30% copper. How much of each should be used?
67. ### Physics

Mixing copper and zinc atoms produces the alloy brass. What would be produced with the fusion of copper and zinc nuclei?
68. ### physics

A copper wire that has a diameter of 2.9 mm carries a current of 39.0 A. Assuming that each copper atom contributes one free electron to the metal, find the drift velocity of the electrons in the wire. The molar mass of copper is 63.5 g/mol and the density of copper is 8.95 g/...
69. ### chemisty

Consider the following unbalanced equation between copper(I) ions and iron to produce copper metal and iron(II) ions: Cu+ + Fe → Cu + Fe2+ What is oxidized in this reaction? A) copper(I) ion B) iron C) copper D) iron(II) ion
70. ### Math

An alloy contains zinc and copper in the ratio 7:9. Find the weight of copper if it has 31:5 kg of zinc
71. ### chemistry

10.5 g sample of copper metal at 25.0°C is heated by the addition of 150.0 J of energy. The final temperature of the copper is _____°C. The specific heat capacity of copper is 0.38 J/ goC.
72. ### Science-chemistry

an alloy of metal A and B in the eatio of 2:5 and weighs 36g the percentage of metal A is 22.22% if atomic mass of A is 40 then atomic mass of metal B is
73. ### chemistry

pure zinc metal into a solution of copper(II) sulfate, the zinc will slowly dissolve to produce zinc sulfate solution, and the copper(II) ion of the copper(II) sulfate will be converted to metallic copper. Write the unbalanced equation for this process. (Include states-of-...
74. ### 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
75. ### Chemistry

a coffee cup calorimeter normally consists of two nested styrofoam cups with a lid. a coffee cup calorimeter of this type contains 125.0 g of water at 20.00 degrees C. A 120.0 g sample of copper metal is heated to 98.0 degrees C by putting it into a beaker of hot water. The ...
76. ### Math

A certain alloy contains 5.25% copper. How much copper is there in a piece weighing 200 pound? A)1.50 pounds B)105 poounds C)10.5 pounds D)1050 pounds i think its D am i right
77. ### chemistry

(1) The same quantity of electricity is passed through 2voltameters connected in series, one copper voltmeter with copper electrode in a copper(ii) tetraoxosulphate(vi) solution. The other platinum electrode in a dilute solution of tetraoxosulphate (vi) acid. 500cm³ of dry ...
78. ### chemistry..

(1) The same quantity of electricity is passed through 2voltameters connected in series, one copper voltmeter with copper electrode in a copper(ii) tetraoxosulphate(vi) solution. The other platinum electrode in a dilute solution of tetraoxosulphate (vi) acid. 500cm³ of dry ...
79. ### Physics

1)An alloy of copper zinc has a mass of 4.9kg.when suspended in water.0.98kg of water was displaced by it.calculate the mass of zinc in the alloy if 2.5 and 19.6 are the specific gravity of the zinc and copper respectively 2) A steel ball of diameter 0.2mm, falls with a ...
80. ### check 3 quick physic questions

Identify the areas of physics involved in each of the following tests of a lightweight metal alloy proposed for use in sailboat hulls: a. testing the effects of a collision on the alloy Would this be relativity since relativity includes particle collisions? b. testing the ...
81. ### chemistry 21

13. Pure copper may be produced by the reaction of copper(I) sulfide with oxygen gas as follows: Cu2S(s) + O2(g) „_ 2Cu(s) + SO2(g) If the reaction of 0.540 kg of copper(I) sulfide with excess oxygen produces 0.140 kg of copper metal, what is the percent yield? A) 32.5% B) ...
82. ### Chemistry

1. is it easy to distinguish between between the different oxidation states of copper? why? 2. You synthesized copper (I) chloride and copper (I) oxide. How do they differ from their copper (II) analogs? comment on the stability of these moist solids in air. If unstable, what ...
83. ### chemistry

one piece of copper metal at 105 C has twice the mass of another copper piece at 45 C. What is the final temperature if these two pieces are placed in a calorimeter. Specific heat of copper is 0.387 J/g.K.
84. ### science

when copper metal is added to silver nitrate in solution, silver metal and copper (II) nitrate are produced. what mass of silver is produced from 100.g Cu?
85. ### chemistry

Determine themass of the copper solid produced when excess magnessuim metal reacts with 250 ml of 0.0500M copper acetate solution. if 6.00g of copper was recovered experimentally determine the percent yeild. Thank you in advance.
86. ### math

A certain alloy contains 5.25% copper. How much copper is there in a piece weighing 200 pounds. A.1.05 pounds B.105 pounds C.10.5 pounds D.1050 pounds Would it be C 10.5 pounds

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 more reactive, copper ...
88. ### chem

A greenish blue salt known to be composed of copper and chloride ions is dissolved in DI water. Aluminum metal is used to reduce the copper ions to metallic copper, which is collected, dried and weighed. If the origanal sample has a mass 1.362g and the collected copper has a ...
89. ### physics

the relative density of an alloy is 6.5.find the mass of the solid alloy cube of side 20cm.what volume of the alloy has a mass of 13kg
90. ### physics

the relative density of an alloy is 6.5.find the mass of the solid alloy cube of side 20cm.what volume of the alloy has a mass of 13kg
91. ### Physics

The relative density of an alloy is 6.5,calculate the mass of the solid alloy cube of sides 20cm.what volume of alloy has a mass of 3kg
92. ### Chemistry

Write the balanced net ionic equation for the following? a) Copper metal and zinc ion b) zinc and cupric ion c) Copper metal and hydrogen ion d) zinc metal and hydrogen ion e) iron metal and hydrogen ion f) Chlorine (Cl2) and bromide ion (Br-) g) Chlorine (Cl2) and iodide ion...
93. ### physics

The relative Density of an alloy is 65.(a) find the mass of a solid alloy cube of side 20cm.(b) what vol of the alloy has a mass of 13kg? Please explain in details
94. ### Chemistry

The specific heat of copper metal was determined by putting a piece of the metal weighing 33.6 g in hot water. The quantity of heat absorbed by the metal was calculated to be 47 J from the temperature drop of the water. What was the specific heat of the metal if the ...
95. ### Chemistry

The specific heat of copper metal was determined by putting a piece of the metal weighing 33.6 g in hot water. The quantity of heat absorbed by the metal was calculated to be 47 J from the temperature drop of the water. What was the specific heat of the metal if the ...
96. ### Science

The specific heat of copper metal was determined by putting a piece of the metal weighing 33.6 g in hot water. The quantity of heat absorbed by the metal was calculated to be 47 J from the temperature drop of the water. What was the specific heat of the metal if the ...
97. ### Chemistry

The specific heat of copper metal was determined by putting a piece of the metal weighing 39.4 g in hot water. The quantity of heat absorbed by the metal was calculated to be 47 J from the temperature drop of the water. What was the specific heat of the metal if the ...
98. ### Chem

Final question.. An alloy used in aircraft construction consists of aluminium, copper and magnesium. An 11.34g sample of alloy was treated with alkali to dissolve the aluminium, leaving a residue of mass 2.73g. This residue was treated with dilute hydrochloric acid solution to...
99. ### Chemistry

A mettallurgist decided to make a special alloy. He melted 30 grams of Au(Gold) with 30 grams of Pb. This melting process resulted to 42 grams of an Au-Pb alloy and some leftover Pb. This scientist wanted to make 420 grams of this alloy with no leftovers of any reactants. how ...
100. ### algebra

A jeweler wants to make a silver alloy to be used to make necklaces. How many ounces of a silver alloy that costs \$3.50 per ounce should be mixed with one that costs \$7.00 per ounce to make a new 30-ounce alloy that costs \$6.30 per ounce