# A compound metal bar has 4 kg of copper making up the first third of the bar, while the remainder is made of 12 kg of lead. The bar is 3 meters in length. In addition, a mass of 2

17,559 results
1. ## 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
2. ## physics

A metal bar of mass 100g is warmed from 20°c to 80°c. How much heat is absorbed by the metal bar if the specific heat capacity of this metal is 450J/Kg K.

asked by Anonymous on April 29, 2018
3. ## Chemistry

An unknown metal, m, forms an ionic compound with the formula, M2S3. Which formula represents the compound formed by the metal with oxygen? a) MO b) MO2 c) MO3 d) M2O3

asked by Anonymous on May 7, 2017
4. ## Chemistry

A strip of zinc metal was placed in a beaker that contained 120mL of a solution of copper(2) nitrate, Cu(NO3)2(aq). The mass of the copper produced was 0.813g. Find the initial concentration of the solution of copper(2)nitrate. Can u help me out with

asked by Kristien on March 5, 2013
5. ## 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

asked by lee on January 31, 2010
6. ## 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

asked by Joe on July 6, 2016
7. ## chem

1.Aqueous solutions of sodium and copper (II) chloride are mixed together. which statement is correct? a. both NaCl and CuS will precipitate from solution b. no precipitate will form c. CuS will precipitate from solution d. NaCl will precipitate from

asked by audrianna on December 3, 2009
8. ## Math

A golden bar of metal (5 centimeters by 18 centimeters by 4 centimeters) being transported by armored car is suspected of being fake, made from a less valuable metal with a thin coating of pure gold. The bar is found to have a mass of 2.7 kilograms. if the

asked by Chuck on February 7, 2016
9. ## Chemistry

A metal bar having a mass of 212 g is heated to 125.0°C and then dropped into 375 g of water at 24°C. After a while the temperature of the water and the metal is 34.2°C. If the specific heat of the metal is 0.831 J/g°C, how much heat did the metal

asked by Ellie on September 13, 2014
10. ## Physics

A conduction heat wave is caused to pass through a metal bar of average temperature Tmean = 36 degrees altering its temperature sinusoidally with an amplitude of Ti=2 degrees. The equation which gives the temperature T(x.t) of the metal bar at any place

asked by Michaela on April 15, 2011
11. ## physics

A compound metal bar has 4 kg of copper making up the first third of the bar, while the remainder is made of 12 kg of lead. The bar is 3 meters in length. In addition, a mass of 2 kg is hung 1m from the left end of the bar, and a mass of 6 kg is hung 2m

asked by tyger2020 on December 5, 2018
12. ## AP Chem

Write the net ionic formula. A bar of strontium metal is immersed in a 1.0 M copper (II) nitrate solution. How do I go about doing this?

asked by Needs help on October 3, 2007
13. ## chemistry

Based on the chemical formula, what type of compound is sodium fluoride (NaF)? Why? Sodium fluoride is an ionic compound because it is composed of a positive and negative ion (metal and nonmetal). A metallic compound would have multiple metal atoms bonded

asked by Kylee on November 11, 2019
14. ## Solid Mensuration

A metal hollow bar whose cross-section and dimensions are shown below weighs 8x10^3 kg/m^3 and measures 2m in lenght. Determine the mass of the metal bar with a square hole section.

asked by Gray on March 31, 2016
15. ## 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
16. ## 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)

asked by Jack on September 21, 2010
17. ## 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

asked by Shannon on April 16, 2014
18. ## Science

the specific heat capacity of solid copper metal is 0.385 j/g k. Calculate temperature rise of 100g bar of copper when 250J of heat is transferred into it?

asked by Sanjana on February 14, 2018
19. ## Chem! hELP

An experiment is preformed to determin the empirical formula of a copper iodide formed by direct combination of elements. A clean strip of copper metal is weighed accurately. Its is suspended in a test tube containing iodine vapor generated by heating

asked by ALie on October 22, 2006
20. ## chemistry

sodium iodide copper II chloride sodium sulphate NaOH HCl magnesium nitrate also is this true: if the metal in the compound is higher in the reactivity series than hydrogen then hydrogen is produced instead of the metal at the positive electrode.

asked by Nabiha on November 8, 2009
21. ## chemistry

What is formed at the anode and cathode when the following solutions are electrolysed? sodium iodide copper II chloride sodium sulphate NaOH HCl magnesium nitrate also is this true: if the metal in the compound is higher in the reactivity series than

asked by Nabiha on November 8, 2009
22. ## chemistry

What is formed at the anode and cathode when the following solutions are electrolysed? sodium iodide copper II chloride sodium sulphate NaOH HCl magnesium nitrate also is this true: if the metal in the compound is higher in the reactivity series than

asked by Nabiha on November 8, 2009
23. ## chemistry

An analysis for copper was performed on two pure solids. One solid was found to contain 43.0% copper; the other contained 32.0% copper. Could these solids be samples of the same copper-containing compound? Please help.

asked by Anonymous on January 21, 2013
24. ## 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
25. ## chemistry

oxygen will react with the metal copper it will also react with the nonmetallic compound butane (c4h10) which ofthese reactions is combustion reaction?explain your answer.

asked by lauren on September 1, 2011
26. ## Physics mit 2.01x

F13Q1_1: COMPOSITE BAR UNDER DISTRIBUTED LOADING The composite bar AB has length L and is fixed at A(x=0). The bar has a constant cross-section and is composed of two steel plates, of modulus Es=2E0 sandwiching a copper core of modulus Ec=E0. The steel

asked by Michael on July 15, 2014
27. ## 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

asked by sh on October 21, 2012
28. ## Chemistry

I have a problem that says: Copper is an excellent electrical conductor widely used in making electric circuits. In producing a printed circuit board for the electronics industry, a layer of copper is laminated on a plastic board. A circuit pattern is then

asked by Kerry on August 16, 2015
29. ## chemistry

a 0.2000 grams sample of aluminum metal is added to a solution containing 1.0000grams of an unknown compound made of platinum and chloride ion. the reaction results in the formation of aluminum chloride and platinum metal. when the reaction is complete,

asked by Anonymous on March 3, 2014
30. ## physics

A .5 m long, 3 cm diameter metal bar has a Young’s Modulus of 7.0x1010 N/m2. If a 50,000 N force is applied to the end of the bar, by how much will it compress?

asked by Kate on July 5, 2011
31. ## chemistry

Suppose that you wanted to be sure that a metal ion, any metal ion, would dissolve in water. What salt of the metal ion compound would you choose? 1. the hydroxide (OH−) salt of the metal ion 2. the carbonate (CO2− 3 ) salt of the metal ion 3. the

asked by cheri on September 19, 2012
32. ## 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

asked by Glenna on October 9, 2008
33. ## 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

asked by Lance on June 7, 2011
34. ## Chemistry

Starting with copper metal describe how a sample of crystals of copper (ii)chloride may be prepared in the lab

asked by Winnie on August 18, 2018
35. ## 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

asked by Caroline on April 16, 2014
36. ## 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

asked by Diane on June 16, 2017
37. ## chemistry

A rectangular metal bar has a volume of 50.0 inches cubed.The Metal BaR weighs 1.42kg. Calculate the density of the metal in grams per cubic centimeter.

asked by Kevin on October 12, 2009
38. ## 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)

asked by Dan on November 8, 2015
39. ## electricity

if a bar of copper is brought near a magnet, the copper bar will be? A)attracted by the magnet. B)unaffected by the magnet. C)repelled by the magnet. D)made into an induced magnet. B)unaffected by the magnet. Actually there is a very slight repulsn due to

asked by angela on August 24, 2005
40. ## 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

asked by Anonymous on October 18, 2008
41. ## Physics

A bar of aluminum (bar A) is in thermal contact with a bar of iron (bar B) of the same length and area. One end of the compound bar is maintained at Th = 75.5°C while the opposite end is at 30.0°C. Find the temperature at the junction when the energy

asked by Chelsea on November 27, 2010
42. ## chem

A student determines the composition of a copper chloride compound. Tell whether each of the situations described below would cause the student’s experimental value for the percent of copper in the compound to be greater than less than, or unchanged from

asked by Anonymous on March 2, 2014
43. ## Chemistry

A compound was found to contain copper and chlorine. The mass of the compound was 351 mg. The amount of copper in the sample was found to be 225 mg. What is the empirical formula for the compound?

asked by Sandy M. on October 6, 2009
44. ## 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.

asked by Amy on April 21, 2013
45. ## 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:

asked by Anonymous on October 5, 2009
46. ## 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

asked by Dan on November 8, 2015
47. ## 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
48. ## Physics

A "Bus" bar is in the form of a slab of copper 2meters long, 1cm wide, and 10 cm thick. a) What is the resistance of the bar at 0 degrees celcius? b) What potential difference is needed to push 5000 amps through the bar?

asked by Tristan on May 16, 2010
49. ## science

if a bar of copper is brought near a magnet, the copper bar will be not magnetic, nonferrous, not attracted to the magnet, etc

asked by rita on October 8, 2006
50. ## 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
51. ## Math

A length of a metal bar has a cross sectional square of 12cm. If the length is 2m, what is the volume of the metal bar in cm3?

asked by Lillie on September 21, 2016
52. ## Chemistry

So I have to find the % by mass of an unknown metal that reacted with HCl to create MCl2 (with the M being unknown). Then I need to determine identity of the missing metal. I know that the final mass of the compound MCl2 is 12.47g and that the original

asked by Krys on September 21, 2016
53. ## 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

asked by Julia on November 30, 2011
54. ## science

An analysis for copper was performed on two pure solids. One solid was found to contain 43.0% copper; the other contained 32.0% copper. Could these solids be samples of the same copper-containing compound?

asked by Donald on October 23, 2013
55. ## chemistry

Calculate the current that must be passed into a solution of copper(ii)salt for 70sec in order to deposit 29gram of copper metal which atomic mass of copper is for 64

asked by dubem on June 30, 2019
56. ## 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.

asked by jennifer on June 29, 2015
57. ## Calculus I

Suppose we have a metal bar of length L0 metres at temperature T0 in degrees Celsius.When the bar is heated or cooled, the length of the bar changes. The amount that the length changes is proportional to the product of the temperature change and the

asked by Anonymous on September 16, 2014
58. ## 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)

asked by dannystein on February 13, 2016
59. ## 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)

asked by dannystein on February 12, 2016
60. ## strength of materials

The composite bar BCD in the figure is fixed at the wall B (x=0), and has constant cross sectional area A_0. The bar is composed by joining, at section C, two segments (BC and CD) of equal length L. Segment CD is homogeneous, made of copper. Segment BC is

asked by ashwni on July 17, 2016
61. ## PHYSICS

Two parallel METAL rods form a plane inclined at 20.0° to the horizontal. The upper end of the rods are connected together by a resistor of 118.0 Ω. The lower end of the rods are held in an ELECTRICALLY INSULATING block. They are separated horizontally

asked by Khuan on November 29, 2014
62. ## Physics

The composite bar BCD in the figure is fixed at the wall B (x=0), and has constant cross sectional area A_0. The bar is composed by joining, at section C, two segments (BC and CD) of equal length L. Segment CD is homogeneous, made of copper. Segment BC is

asked by skrillex on July 17, 2016
63. ## Physics

A bar of gold is in thermal contact with a bar of silver of the same length and area. One end of the compound bar is maintained at 80.0°C while the opposite end is at 30.0°C. When the energy transfer reaches steady state, what is the temperature at the

asked by Brody on January 30, 2014
64. ## Chemistry

A metal bar having a mass of 212 g is heated to 125.0°C and then dropped into 375 g of water at 24°C. After a while the temperature of the water and the metal is 34.2°C. If the specific heat of the metal is 0.831 J/g°C, how much heat did the metal

asked by El on September 13, 2014
65. ## 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?

asked by megan on July 5, 2013
66. ## 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

67. ## chemistry

1)RuO2 is molecular, but why is it insulator even though Ru is metal? 2)Why is TiO ionic? I thought only group 1 and 2 would make ionic compound 3)If the the compound has metal and metalloid like GaAs, is it always semiconductor

asked by eng on February 21, 2010
68. ## science

When 90 kJ is removed from a 2-kg copper bar, its temperature drops from 200°C to 85°C. The specific heat of copper is

asked by Anonymous on October 14, 2014
69. ## 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.

asked by sonya on October 20, 2014
70. ## Physics

The substation bus bar is made up of 2-iches round copper bars 20 ft. long. What is the resistance of each bar if resistivity is 1.724 x 10-6 ohm-cm.

asked by Jhun on September 25, 2015
71. ## Physics

A hammer taps on the end of a 8.13m long metal bar at room temperature. A microphone at the other end of the bar picks up two pulses of sound, one that travels through the metal and one that travels through the air. The pulses are separated in time by

asked by rory on November 21, 2012
72. ## Calculus

I do not understand what this question is asking and how to get the result for it: "Suppose we have a metal bar of length L0 metres at temperature T0 in degrees Celsius.When the bar is heated or cooled, the length of the bar changes. The amount that the

asked by Anonymous on September 16, 2014
73. ## physics

A hammer taps on the end of a 4.02 m long metal bar at room temperature. A microphone at the other end of the bar picks up two pulses of sound, one that travels through the metal and one that travels through the air. The pulses are separated in time by

asked by Anonymous on November 16, 2009
74. ## physics

A hammer taps on the end of a 3.32 m long metal bar at room temperature. A microphone at the other end of the bar picks up two pulses of sound, one that travels through the metal and one that travels through the air. The pulses are separated in time by

asked by Anonymous on November 21, 2008
75. ## Physics

A hammer taps on the end of a 4.20 m long metal bar at room temperature. A microphone at the other end of the bar picks up two pulses of sound, one that travels through the metal and one that travels through the air. The pulses are separated in time by

asked by Gavin on November 22, 2010
76. ## chemistry

What is formed at the anode and cathode when the following solutions are electrolysed? sodium iodide copper II chloride sodium sulphate NaOH HCl magnesium nitrate also is this true: if the metal in the compound is higher in the reactivity series than

asked by Nabiha on November 8, 2009
77. ## chemistry

What is formed at the anode and cathode when the following solutions are electrolysed? sodium iodide copper II chloride sodium sulphate NaOH HCl magnesium nitrate also is this true: if the metal in the compound is higher in the reactivity series than

asked by Nabiha on November 8, 2009
78. ## chem/science

Please predict what will happen. Im not very good in chem. Iron metal and pb(NO3) Lead metal and Mg(9NO3)2 Copper metal and AL(NO3)3 Lead metal and AgNO3

asked by jim on April 18, 2013
79. ## chemistry

1) Arrange the metal-metal ion reactions (aluminum, copper, nickel), M^n+ + ne^- --> M^0, in a column, in order of decreasing ability as oxidizing agents... What I put was : Al^+3 + 3e^- --->Al Ni^+2 + 2e^- --->Ni Cu^+2 + 2e^- --->Cu 2) Also, explain your

asked by danny on March 11, 2009
80. ## 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.

asked by Juliana on January 11, 2015
81. ## Mechanics

The composite bar BCD in the figure is fixed at the wall B (x=0), and has constant cross sectional area A0. The bar is composed by joining, at section C, two segments (BC and CD) of equal length L. Segment CD is homogeneous, made of copper. Segment BC is

asked by Tony on October 28, 2017
82. ## binary compounds

an example of a binary compound is Take a metal and combine it with a non-metal to make a binary compound. Post your answer here if you want us to comment on it.

asked by mimi on November 11, 2006
83. ## 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.

asked by amber on December 10, 2007
84. ## chemistry

You are given a small bar of an unknown metal, X. You find the density of the metal to be 11.7 g/cm3. An X-ray diffraction experiment measures the edge of the unit cell as 5.12 angstroms. Assuming the metal crystallizes in a face-centered cubic lattice,

asked by Anonymous on February 15, 2012
85. ## AP CHEM

A bar of strontium metal is immersed in a 1.0 M copper(ll) nitrate solution. write the net ionic. I have the molecular formula written out but im not sure how to write the net ionic for this single displacement reaction

asked by Sophie on September 18, 2016
86. ## Chemistry 106

An unidentified metal forms an ionic compound with the carbonate anion. The metal forms a 2+ cation. If the minimum ration of the number of protons in the metal to the oxygen protons s 5:6, what is the metal?

asked by Samantha on October 13, 2010
87. ## 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

asked by Brittany on October 18, 2008
88. ## 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

asked by Glenna on October 18, 2008
89. ## 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.

asked by astoeck on October 2, 2010
90. ## chemistry

if unlimited iron is available to react with 34.0g of copper (II) chloride, how many g of copper metal would be produced?

asked by me on May 14, 2011
91. ## Chemistry

Starting with copper metal, describe how a sample crystals of copper 2 chloride may be prepared in the labaratory

asked by Faith on August 12, 2015
92. ## 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
93. ## chemistry

explain changes that occur when the following substances are separated heated in oven crucible 1)copper metal. 2)copper nitrate

asked by fatma on December 31, 2018
94. ## 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?

asked by Lakshmi on December 20, 2016
95. ## Chemistry

Suppose that you wanted to be sure that a metal ion, any metal ion, would dissolve in water. What salt of themetal ion compound would you choose? 1. the carbonate (CO2−3 ) salt of the metal ion 2. the hydroxide (OH−) salt of the metal ion 3. the

asked by May on October 4, 2010
96. ## 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
97. ## science

when copper metal is added to silver nitrate in solution, silver metal and copper (II) nitrate are produced. if 1.00*10^2g of copper metal is added to the solution containing 1000.0 g of silver nitrate, what mass of silver metal will be produced?

asked by Destiny on January 28, 2020
98. ## math

A cylindrical metal bar of diameter 14 cm and length 2m is melted and moulded into spherical balls.In the process,5% by volume is lost and what remains makes ball of radius 3.5cm.a)calculate the volume of metal used to make the balls.b)find to the nearest

asked by lucy on April 15, 2020
99. ## College Chemistry 104

Students are attempting to construct a battery in the laboratory that will light up a light bulb. Compare the following lists prepared by students and determine which student will not be able to successfully build a "battery" that will light up the bulb.

asked by Claire on May 10, 2013
100. ## chemistry

A 77.40 kg piece of copper metal is heated from 19.6°C to 337.3°C. Calculate the heat absorbed (in kJ) by the metal.

asked by Dani on October 21, 2016