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April 16, 2014

Search: What charge in coulombs, is required to deposit 0.301 g Cu(s) from a solution of Cu2+ (aq)?

Number of results: 40,567

Inorganic chemistry
What change in coulombs, is required to deposit 0.301 g Cu(s) from a solution of Cu^2+(aq)
Saturday, April 11, 2009 at 11:22pm by Steve

Inorganic chemistry
What charge in coulombs is required to deposit 0.301g Cu(s) from a solution of Cu^2+? Cu^2+ 2e^- = Cu 0.301g/63.5g/mol = 4.7 x 10^-3 mol Cu (4.7 x 10^-3 mol Cu) (2 mol e^-/mol Cu) I should be able to mutiply that by 96,500 (Faraday number) to get 914C, but I don't. ...
Sunday, April 12, 2009 at 8:54pm by Steve

Chemistry
96,485 coulombs are required to produce 1/2 mole Cu(63.546g/2); therefore, x coulombs are required to produce 23.8 g Cu. There are 6.022 x 10^23 electrons in 96,485 coulombs.
Sunday, May 2, 2010 at 8:38am by DrBob222

Chemistry
coulombs = amperes x seconds 96,485 coulombs will deposit 63.54/2 g Cu and 32/2 g oxygen at STP
Friday, February 3, 2012 at 4:07pm by DrBob222

Electrochemistry
A current of 2.50 A is passed through a solution containing Cu+2 ions for 4.00 hours. Calculate the mass of Cu atoms that form at the cathode. Charge= current*time Convert the charge in coulombs to number of electrons. Since it takes two electrons per Cu+2 atom, divide the ...
Thursday, May 17, 2007 at 11:01am by Jerry

Chemistry
Coulombs = A x sec = 1.70 x 2 x 60 x 60 = ?? One equivalent weight will be deposited by passing 96,495 coulombs. ONe equivalent weight = 63.54 g/2 = 31.8 but you need to do that more accurately. Then 31.8 x #coulombs/96,485 = g Cu deposited. g Cu initially = 2L x 0.580M x 63....
Sunday, April 3, 2011 at 5:19pm by DrBob222

chemistry
amperes x seconds = coulombs coulombs/96,485 = Faraday's 1 Faraday will deposit 1 equivalent weight of Zn^+2 or 1/2 mole Zn^+2. I get 0.965 x 10 min x (60 sec/min) = ?? coulombs. That divided by 96,485 = 0.006 Faraday's and that will deposit 0.003 mole Zn^+2. How many moles Zn...
Thursday, February 19, 2009 at 6:58pm by DrBob222

Chemistry
A cell can deposit atomic mass Al/3 (about 27/3 = approx 9g) Al when 96,485 coulombs is passed through a solution. How many coulombs do you have? That's coulombs = amperes (that's amps) x seconds. So you have C = 5.00 x 5.00 hrs x (60 min/1 hr) x (60 sec/1 min) = about 9E4. ...
Sunday, April 6, 2014 at 4:58pm by DrBob222

Chemistry
Calculate the volume of 1.0 M copper(II) sulfate solution required to completely react with 1.0 g of Fe(s) according to this equation: 2 Fe(s) + 3 Cu^2+ (aq) --> 2 Fe^3+ (aq) + 3 Cu (s). the copper in the reactant has a charge of 2+ and the iron in the product has a charge ...
Tuesday, March 5, 2013 at 8:26pm by Sabrina

Chem
It takes 96,485 coulombs of electricity to plate (deposit) 1/2 mole copper metal. Use that information to calculate coulombs. Then amperes x seconds = coulombs.
Saturday, May 1, 2010 at 11:05am by DrBob222

physics
A point charge of +10 micro-coulombs lies at x = -0.39 m, y = 0 m, a point charge of -5.7 micro-coulombs lies at x = +0.39 m, y = 0 m, and a point charge of +14.9 micro-coulombs lies at x = 0 m, y = -0.3 m. A point charge of +10 micro-coulombs is moves from x = 0 m, y = +0.11 ...
Friday, February 10, 2012 at 8:32am by Mandaleigh

physics2
A charge of -6.5 micro-Coulombs is placed at the origin of a coordinate system. Another charge of -7.6 micro-Coulombs is placed at x = +0.29 m, y = +0.17 m. A third charge of +14 micro-Coulombs is placed at x = -0.29 m, y = 0 m. What is the magnitude of the total electric ...
Saturday, January 29, 2011 at 12:06pm by kelly

chemistry
It takes 96,485 coulombs to deposit 1 equivalent weight of Al (27/3 = 9 grams). Therefore, it will take 96,485 x (25/9) to deposit 25.0 grams = ?? The amperes x sec = coulombs. You know sec (convert 5 min to seconds) and coulombs, calculate amperes.
Tuesday, April 20, 2010 at 5:07pm by DrBob222

Food Analysis
1.If 0.5l of 5M solution of CU(NO3) is diluted to a volume of 0.80l by adding water, what is the molarity of the resulting diluted solution? 2.How many ml of water will be required to dilute 11ml of 0.45Macid solution to a molarity of 0.1M? 3.Calculate the weight CuSO4.5H2O ...
Tuesday, March 8, 2011 at 9:07am by Sarah

Chemistry
a. 96,500 coulombs will deposit 1 equivalent of a metal. 1 equivalent of Ag is 107.9/1 electron = 107.9 grams. You have 94,500 C so..... b. 2Cl^- ==> Cl2 + 2e 96,500 C will release molar mass Cl2/2 = ? grams and that will occupy 22.4 L at STP. You have 96,500 C so ...... c...
Friday, June 21, 2013 at 8:59pm by DrBob222

NEED HELP! CHEMISTRY
96,485 coulombs will deposit 1 equivalent weight of a metal. For Cu, that is 95,485C will deposit 63.546/2= 31.77 g. The deposit was 3.10 g and that is 3.10/31.77 = 0.0976 C that flowed through the cells. 1 equivalent weight Sn = 118.71/2 = ?? 1 equivalent weight Fe = 55.85/3...
Monday, March 29, 2010 at 11:16pm by DrBob222

chemistry
I get 1.528 which would round to 1.53 but it won't make that much difference. I think your problem is the molar mass of Cr. 1 F (96,485 coulombs) will deposit 1 equivalent of Cr and 1 eq is molar mas of 52 divided by change in number of electrons. The problem isn't really ...
Tuesday, April 22, 2008 at 11:25pm by DrBob222

college chemistry
Perhaps I can get you started but that is it. Since the concns are not standard, first calculate the Eo value for each half cell but BOTH as reductions. For Zn^+ + 2e = Zn we have E = Eo-(0.0592/n)*log[(Zn)/(Zn^+2)] = -.763-(0.0592/2)*log[1/0.1)] = -0.793v. (check my work on ...
Wednesday, April 28, 2010 at 12:42pm by DrBob222

Math
Two small conducting spheres are identical except that sphere x has a charge of -10 micro coulombs and sphere y has a charge of + 6 micro coulombs . After the spheres are brought in contact and then separated,what is the charge on each sphere ,in micro coulombs ?
Thursday, August 18, 2011 at 5:21pm by Troy

physics 2
A charge of -6.8 micro-Coulombs is placed at x = 0, y = 0. A charge of -18.5 micro-Coulombs is placed at x = 0, y = +37 cm. Another charge of -12.9 micro-Coulombs is placed at x = +17 cm, y = 0 cm. What is the angle the total electric force on the charge at x = +17 cm, y = 0 ...
Friday, January 18, 2013 at 2:18pm by Jessica

physics
The current in Amperes (which is Coulombs/s)is 5.0. Multiply that by 240 s for the charge transfer, in Coulombs. Divide the answer by the electron charge (1.6*10^-19 C) for the number of electrons transferred.
Thursday, October 14, 2010 at 3:02am by drwls

Chemistry
It will require 96,485 coulombs to deposit 27/3 = 9 g Al. Therefore, it will require 96,485 x (15/9) coulombs to deposit 15 g. 1 C = Amp x sec. You know C and amps solve for seconds.
Monday, December 3, 2012 at 12:21am by DrBob222

chemistry
I don't get 4.6 hours. 96,485 C will deposit 63.546/2 g (31.773 g) Cu. So we need how many coulombs? 96,485 C x (4.23/31.773) = ? C amperes x seconds = coulombs 75 x seconds = ? C = about 171 seconds. I note that 0.77 amps would take 4.6 hours. I wonder if that could be a typo...
Monday, June 18, 2012 at 2:15pm by DrBob222

Physics
Compute the potential energy of the configuration, assuming that the charges are brought in from infinity one at a time. The will be the energy required. Let each corner charge be q and the square side length a. brining in the first charge requires no work. The second charge ...
Thursday, August 19, 2010 at 10:52pm by drwls

chemistry
Find coulombs, then amp x seconds = coulombs. How many grams Cu do you have that's deposited.
Monday, June 18, 2012 at 2:15pm by DrBob222

chemistry
2H2O ==> 2H2 + O2 amp x seconds = coulombs. 96,485 coulombs will deposit 1 g H atoms or 2*96,485 coulombs will deposit 2g H2 molecules which will occupy 22.4L at STP. Coulombs for 1.0L will be 2*96,485 x (1.0/22.4) = about8615 (approximately) ,then amps x sec = about 8615, ...
Thursday, March 7, 2013 at 11:07pm by DrBob222

Chemistry
One electron has a charge of 1.6E-19 coulombs 16E-19 coulombs/e x #e = 18E-6 coulombs. Solve for #e.
Monday, September 17, 2012 at 11:49pm by DrBob222

Chemistry
You may not be able to post for a few days but I think you can read responses. Here is how you do this problem. You want 7.30g Ni. 96,485 coulombs will deposit 58.7g/2 or 29.35g Ni. so you will need 96,485 coulombs x (7.35/29.35) = approx 24,000 coulombs but that's an estimate...
Wednesday, April 2, 2014 at 8:32pm by DrBob222

physics
Calculate the magnitude and direction of the Coulomb force on each of the three charges connected in series: 1st - 6 micro Coulombs (positive charge) 2nd - 1.5 micro Coulombs (positive charge) 3dr - 2 micro Coulombs (negative charge) Distance between 1st and 2nd - 3cm Distance...
Wednesday, May 16, 2012 at 11:19pm by andrew

physics
Calculate the magnitude and direction of the Coulomb force on each of the three charges connected in series: 1st - 6 micro Coulombs (positive charge) 2nd - 1.5 micro Coulombs (positive charge) 3dr - 2 micro Coulombs (negative charge) Distance between 1st and 2nd - 3cm Distance...
Monday, May 21, 2012 at 7:35am by andrew

Gen Chem
Chromium can be electroplated from an aqueous solution containing sulfuric acid and chromic acid, H2CrO4. What current is required to deposit chromium at a rate of 1.25 g/min? 1mol H2CrO4 has 51.996 grams current= coulomb/sec How do I convert to get coulombs from the problem?
Friday, March 28, 2008 at 8:59pm by Sarah H

Chemistry
coulombs = A X S convert 89 mins to seconds ____ c (1 c/1 mol e-) = ___ mol e- ____ mol e- (1 mol/2 e- cu 2+) = mol cu mol cu x MW cu = g cu
Sunday, April 21, 2013 at 12:20pm by Wrinkly

physics
An infinite sheet with a surface charge density of -2.1 micro-coulombs/m2 runs parallel to the x axis. Another infinite sheet a surface charge density of +2.1 micro-coulombs/m2 runs parallel to the y axis. A charge of -4.1 micro-coulombs moves at a 45 degree angle towards the ...
Friday, February 10, 2012 at 8:33am by Mandaleigh

Physics
Coulombs (ampere-seconds) came about when electrical currents were measured at levels that had easily measured observable effects, in laboratories of the 1800's. The concept of electric charge was first proposed by Benjamin Franklin, nearly a century earlier than that. He ...
Sunday, October 21, 2007 at 4:14pm by drwls

physics 2
Three charges are placed on the y axis. One charge of -3.2 micro-Coulombs is placed at y = 0, another charge of +2.6 micro-Coulombs is placed at y = -0.29 meters, and another unknown charge is placed at y = +0.51 meters. The total force on the charge at y = 0 due to the other ...
Friday, January 18, 2013 at 2:19pm by Jessica

chemistry
coulombs = amperes x seconds. C = 10A x 180 min x (60 s/min) = ?? It takes 96,500 coulombs to deposit 1 mol Cr/3 or 52.01/3 grams.
Friday, June 11, 2010 at 2:59am by DrBob222

chem
If 10.4 liters of O2 at STP are produced by the electrolysis of water, how many coulombs of charge were required?
Saturday, April 20, 2013 at 5:09pm by sarah

chemistry
If 10.4 liters of O2 at STP are produced by the electrolysis of water, how many coulombs of charge were required?
Sunday, April 21, 2013 at 8:42pm by sarah

physics
Using Coulomb's Law, calculate the force of repulsion between a positive charge of 110 Coulombs and another positive charge of 220 coulombs separated by a distance of 2 meters. Use scientific notation. (Hint: use the proportionality constant)
Sunday, June 17, 2012 at 9:54am by LL

physics
Using Coulomb's Law, calculate the force of repulsion between a positive charge of 110 Coulombs and another positive charge of 220 coulombs separated by a distance of 2 meters. Use scientific notation. (Hint: use the proportionality constant)
Sunday, June 17, 2012 at 9:21pm by LL

Chemistry
For the following reaction, what is the correctly balanced overall reaction? Fe(OH)3(s) + Cu(s) → Fe(s) + Cu+(aq) + OH-(aq) A. Fe(OH)3(s) + Cu(s) → Fe(s) + Cu+(aq) + 3 OH-(aq) A can't be right because the charge doesn't balance (zero on left and -2 on right--also ...
Thursday, March 18, 2010 at 3:29pm by DrBob222

Chemistry
If 30.3 liters of O2 at 273K and 1 atm are produced by the electrolysis of water, how many coulombs of charge were required?
Friday, November 19, 2010 at 7:10pm by Dana

Chemistry
If 30.3 liters of O2 at 273K and 1 atm are produced by the electrolysis of water, how many coulombs of charge were required?
Friday, November 19, 2010 at 7:27pm by Dana

Chemistry
If 30.3 liters of O2 at 273K and 1 atm are produced by the electrolysis of water, how many coulombs of charge were required?
Friday, November 19, 2010 at 7:29pm by Dana

physics2
Charges are placed on an equilateral triangle (all angles are equal and equal to 60 degrees). The length of each side of the triangle is 5.7 meters. A charge of +7.1 micro-Coulombs is placed at the bottom corner of the triangle and another charge of +7.1 micro-Coulombs is ...
Saturday, January 29, 2011 at 12:08pm by kelly

Chem
7.2 amps x 90 min x (60 sec/min) = about 40,000 coulombs but you do it more accurately. 96,485 coulombs will deposit 58.7/2 grams Ni. So how much will 40,000 deposit. (58.7g/2) x (40,000/96,485) = ? g Ni.
Tuesday, March 19, 2013 at 4:40pm by DrBob222

physics
A point charge of +4.6 micro-coulombs lies at x = 0 and a point charge of -7.3 micro-coulombs lies at x = +3.3 m. Where on the x axis, is the total electric potential equal to zero? Answer in meters.
Friday, February 10, 2012 at 8:31am by Mandaleigh

chemistry
amperes x seconds = coulombs. coulombs/96,485 = Faradays 1 Faraday will deposit 1 equivalent weight (1/2 mole) Zn. Subtract moles Zn from initial Zn concn and change to molarity.
Monday, February 23, 2009 at 10:58pm by DrBob222

physics
The voltage on A dropped from 10.70 to 6.40 V, or by 4.30 Volts. Capacitor A lost C(A)*deltaV = 1.264*10^-4 Coulombs of charge. That charge flowed to capacitor B, leaving it with 1.264*10^-4 Coulombs and a charge of 6.40 V C(B) = Q/V = 1.264*10^-4/6.4 = 19.8 uF
Wednesday, November 23, 2011 at 10:53pm by drwls

PHYSICS
5.00x 10^-2 mass with charge +0.75 micro coulombs is hung by a thin insulated thread. Charge of -0.9 micro coulombs is held .15meters directly to the right so that the thread makes an angle with the vertical. What is the angle and the tension in the string?
Tuesday, March 29, 2011 at 10:14pm by T

chemistry
5Fe(2+ charge) + MnO4(-1 charge) +8H(1+ charge) -> 5Fe(3+ charge) + Mn(2+ charge) + 4H2O In a titration experiment based on the equation above, 25ml of an Acidified Fe(2+ charge) solution requires 14 ml of standard .050 M MnO4(1- charge) solution to reach the equivalence ...
Wednesday, October 3, 2007 at 11:10pm by corey

physics
A sphere has a radius of 0.20 meters and has a uniform surface charge density equal to 6.3 micro coulombs per meter squared. A second point charge has a magnitude of 0.58 micro coulombs and is 0.61 meters away from the center of the sphere. Find the magnitude of the force ...
Saturday, March 17, 2012 at 10:21pm by doug

Chemistry
in the presence of NH3, Cu+2 forms the complex ion [Cu(NH3)4]+2. If the equilibrium concentrations of Cu+2 and [Cu(NH3)4]+2 are 1.8x10^-17M and 1.0x10^-3M respectively, in a 1.5 M NH3 solution, calculate the value for the overall formation constant of [Cu(NH3)4]+2. Cu+2(aq)+ ...
Tuesday, April 3, 2012 at 8:15pm by lena

Chemistry
E = Ecello - (0.0592/n)*log Q. [See the last line for the equation from which you can get the expression for Q). You know Ecello = 2.71 v from the problem. What you must do is calculate the new concns of Cu^+2 (which is being used up) and Mg^+2 (which is being increased) after...
Sunday, May 2, 2010 at 8:31pm by DrBob222

physics
A conducting spherical shell with a total charge of +12.6 micro-coulombs has a point charge of -3.6 micro-coulombs placed at its center. The negative point charge will push the electrons in the spherical shell away from it. This will leave the inner shell with positive charge ...
Friday, February 10, 2012 at 8:30am by Mandaleigh

chemistry
amperes x seconds = coulombs. 96,485 coulombs will deposit 1 equivalent weight of Cr. Equivalent weight Cr = atomic mass/change in number of electrons in the half reaction.
Saturday, April 19, 2008 at 11:53pm by DrBob222

physics-E&M
An infinite line charge of uniform linear charge density lambda = -2.5 micro Coulombs lies parallel to the y axis at x = 0 m. A point charge of 3.5 micro Coulombs is located at x = 2.5 m, y = 3.5 m. Find the x- and y-components of the electric field at x = 3.5 m, y = 3.0 m. So...
Friday, January 27, 2012 at 5:29pm by aaron b.

Chem
1 Faraday of electricity = 96,485 coulombs and that amount of electricity will deposit 1 equivalent weight of a metal. The equivalent weight = molar mass/change in electrons (in this case delta n = 3). Coulombs = amperes x seconds
Sunday, March 30, 2008 at 6:20pm by DrBob222

physics (coulombs law)
a charge +6 C experiences a force of 2mN in +x direction. a)what was the electric field there before charge was placed ? b)describe the force which a -2c charge would experience if it is located at the point in place of the +6c for a) i assumed the charge is 0 'cos there's no ...
Saturday, December 8, 2012 at 9:48pm by lola

Chem. help please
I get 1.069 for Ecell. In 8 hrs, coulombs = A x seconds. C = 5A x 8 hrs x (60 min/1 hr) x (60sec/1 min) = about 144,000 coulombs. That is how much of a Faraday? 144,000/96,485 = about 1.49 F. 1.49 F will dissolve 65.38/2 g Zn and deposit 63.54/2 g Cu. Subtract g Zn from 250 ...
Saturday, March 10, 2012 at 2:01pm by DrBob222

physics/biology
Determine the number of uncompensated ions (both total number and as a percentage of the bulk ions) required to establish a charge of 100mV across a membrane of a spherical cell that is 25 m in diameter. Assume that the total number of ions inside and outside the cell is .5M...
Tuesday, January 30, 2007 at 12:47pm by Ann

2 more physics questions I need help on, please?
current in amps is coulombs of charge per second I = Q/t so Q = I t 4*1 = 4 2*.5 = 1 8*2 = 16 coulombs Q = i t so t = Q/i t = 2.5 /5*10^-3 = (1/2) * 10^3 = 500 seconds
Saturday, April 23, 2011 at 7:57pm by Damon

physics E&M
I posted a question on here earlier but I wasn't able to solve from what the person had told me. An infinite line charge of uniform linear charge density lambda = -2.5 micro Coulombs lies parallel to the y axis at x = 0 m. A point charge of 3.5 micro Coulombs is located at x...
Friday, January 27, 2012 at 8:00pm by aaron b. (again sorry)

chemistry
What volume of 16M HNO3 is required to dissolve 0.50g of Cu metal in the following reaction? Cu(s) + 4HNO3(aq) ---> Cu(NO3)2 + 2H2O + 2NO2
Thursday, February 3, 2011 at 8:41pm by Alex

physics/biology
Determine the number of uncompensated ions (both total number and as a percentage of the bulk ions) required to establish a charge of 100mV across a membrane of a spherical cell that is 25 μm in diameter. Assume that the total number of ions inside and outside the cell is...
Monday, January 29, 2007 at 8:57pm by Anna

Chemistry
Convert 1.0 L H2 to grams H2 and convert that to coulombs required remembering that 96,485 coulombs will release 1 gram equivalent weight of H2. Then amperes x time(seconds) = coulombs. Solve for time in seconds.
Wednesday, June 5, 2013 at 10:58am by DrBob222

re-chem please
if i had a beaker with .0001M of Cu solution and copper solid (anode) and another beaker with 1M Cu solution and Cu solid (cathode), how would i calculate the half reactions of these two? would the two equations be: cu2+(aq) --> Cu(s) + 2e- and ?
Monday, January 26, 2009 at 2:07pm by sarah

chemistry
Calculate the standard reduction potential for the reaction of Cu(III) to Cu(II) Use the following data: 1) Cu^+3 + 2e^- -> Cu^+, E1 = 1.28 V 2) Cu^+2 + e^- -> Cu^+, E2 = 0.15 V 3) Cu^+2 + 2e^- -> Cu(s), E3 = 0.34 V 4) Cu^+ + e^- -> Cu(s), E4 = 0.52 V
Thursday, March 1, 2012 at 9:11pm by Katie

chemistry
You have 0.250L x 0.433M = about 0.1 mol You want 0.250L x 0.167 = about 0.04 mol. You want to deposit about 0.1-0.04 = about 0.06 mols Cu. g Cu = about 0.06 x 63.546 = about 4.2 g Cu 96,485 C will deposit 63.546/2 or about 31 g Cu. How many C do we need? 96,485 x 4.2/31 = ...
Monday, June 18, 2012 at 2:15pm by DrBob222

Physics
Require than m * g = q * E q is the charge. m is the mass in kg. g is the acceleration of gravity, in m/s^2. E is the field strength, in N/C Solve for the field, charge, q, in Coulombs. The charge must be negative so that the upward electrical force can balance the weight.
Monday, January 30, 2012 at 9:22pm by drwls

Physics
a) Use Gauss' Law for the surface charge density in coulombs/m^2. The front and back surfaces will have equal and opposite charge densities, since the net charge is zero. b) Multiply the answer in a) by the plate area, 0.25 m^2.
Friday, September 18, 2009 at 9:15pm by drwls

chemistry please
if i had a beaker with .0001M of Cu solution and copper solid (anode) and another beaker with 1M Cu solution and Cu solid (cathode), how would i calculate the half reactions of these two?
Monday, January 26, 2009 at 1:44am by sarah

physics
They are asking for charge (in Coulombs), not the number of protons. +e is the charge of one proton.
Monday, March 8, 2010 at 10:04am by drwls

Chemistry
The Cu+ ion is relatively easily oxidized by air but since the coordination number of Cu is 4, it would add two more molecules to make [Cu(NH3)2(X)2]+2. If in water solution the X probably would be H2O molecules, if in ammonia solution it would form the [Cu(NH3)4]+2 ion.
Saturday, March 13, 2010 at 3:23pm by DrBob222

science
2.7moles of Cu is 2.7*Avag number of atoms.. each atom takes two electrons. electrons= 2*2.7*avagnumber charge=electrons*chargeonOneelectron = 2*2.7*avagnumber*1.60217657 10-19 current required=charge/time Well, I have went further than the question asked. Your teacher is ...
Thursday, April 18, 2013 at 8:48pm by bobpursleyl

physics
a. number=charge/e where e is the charge on one electron. b. Use coulombs force equation.
Monday, September 10, 2007 at 10:32pm by bobpursley

CHEMMMM
a solution is 0.10M in free NH3, 0.10M in NH4Cl, and 0.015M in [cu(NH3)4]. Will Cu(OH)2 (s) precipitate from this solution? Ksp of Cu(OH)2 is 2.2810^-20
Saturday, April 18, 2009 at 9:57pm by Jasleen

PHYSICS
(#1) If two pith balls - one which is neutral and another which has a charge of -9.6 uC (micro-Coulombs) - are touched together, how many extra electrons will each ball have? (#2) Charge q1 = 6 uC is at the origin, charge q2 = 7 uC is at y = 2m, x = 0, charge q3 = 1.5 uC is at...
Wednesday, April 8, 2009 at 9:55pm by Bill

Physics
What is the electric field at a point midway between a -7.34 micro coulombs and a +4.49 micro coulombs charge apart 31.5m apart?
Tuesday, July 9, 2013 at 9:17am by Amalia

daily-life
A cash deposit is paying a bill with dollar bills or a check. When a person makes a large purchase, such as a house or car, a cash deposit is required. It a person opens a checking account, then a cash deposit is also necessary.
Tuesday, March 29, 2011 at 9:24pm by Ms. Sue

chemistry
The plastic article must be one of the electrodes but it doesn't conduct electricity. Therefore, the graphite coasting serves that purpose. I would think a graphite rod or carbon rod would serve as the other electrode. amp x seconds = coulombs 0.5A x 300 s = 150 coulombs, 96,...
Sunday, March 10, 2013 at 6:39am by DrBob222

Calculus
The total charge in an electrical circuit as a function of time is given by q=t/(t^2+1) coulombs. Find the maximum charge of q.
Saturday, March 10, 2012 at 1:34pm by Candy

chemistry
For a particular redox reaction NO is oxidized to NO3^ and Cu^2+ is reduced to Cu. Complete and balance the equation for this reaction in basic solution: NO + Cu^2+ --> NO3^- + Cu^+ help. thanks.
Tuesday, December 4, 2012 at 12:21am by dr. bob rocks

physics
That many electrons have total charge Q = 3.5*10^20*1.6*10^-19 = 56 Coulombs Require that I*t = 56 C where I is the current in Amps (Coulombs per second). I = 0.130 C/s Solve for t.
Tuesday, February 22, 2011 at 11:09pm by drwls

Physics
Use F = q V B to solve for the charge, q, in Coulombs. F is the force (N) B the magnetic field (Tesla) and V is the velocity (m/s). If they mean how many ELECTRONS (positive or negative) the particle's charge corresponds to, divide q by the electron charge, e. That will give ...
Wednesday, June 4, 2008 at 5:49pm by drwls

Physics
Divide that charge by the electron charge, e = 1.6*10^-19 Coulombs Looks like it will be about a billion electrons
Monday, May 10, 2010 at 3:58pm by drwls

physics coulombs law
a negative charge 5.0 X 10^-4 C exerts a repulstio force of 7.0 N .on second charge away 0.05 m away. what is the sign and magnitude of the second charge
Wednesday, December 5, 2012 at 4:37am by adithya

Physics
Four coulombs of positive charge flow from the +6 V positive terminal of a battery to the negative terminal at 0V. What is the charge in potential energy of the charge.
Wednesday, January 19, 2011 at 10:13pm by Adriana

physics (coulombs law)
2m N/ 6 C = E in Newtons/coulomb (-2/6) (2m N) ==================================== for a) i assumed the charge is 0 'cos there's no charge placed before that.is it correct? NO! E is force experienced by test charge of one coulomb
Saturday, December 8, 2012 at 9:48pm by Damon

Solution Stoichiometry
If 75.0 mL of an AgNO3 solution reacts with enough Cu to produce .25g Ag by single displacement, what is the molarity of the initial AgNO3 solution if Cu(NO3)2 is the other product?
Sunday, March 29, 2009 at 5:10pm by Anonymous

PHYS 1112
Q = I*t, which means (charge,coulombs) = [current,amps)*(time,seconds) Divide the Charge Q by the electron charge, e, to get the number of electrons. Look up the electron charge if you don't know it. It is a number you should memorize. You should also memorize the formula.
Thursday, February 11, 2010 at 2:06pm by drwls

Chemistry
I like to know where we're going so I don't buy a pig-in-a-poke but on the basis of what you wrote. Cu(NO3)2 + NaOH ==> Cu(OH)2(s) , that is, copper(II) hydroxide precipitates. Adding HNO3 just dissolves it again because the HNO3 neutralizes the NaOH, the solution is not ...
Sunday, March 21, 2010 at 11:38pm by DrBob222

Physics
The total charge in an electrical circuit as a function of time is given by q=t/t^2+1 coulombs. Find the maximum charge q. Please provide your reasoning.
Thursday, May 3, 2012 at 11:04pm by Liz

Physics
a micro is 10^-6 or one millionth so we are talking about -30 *10^-6 coulombs the charge on the electron is -1.6 *10^-19 Coulombs so N electrons * (-1.6*10^-19 coulombs/1 electron) = -30 *10^-6 coulombs so N = 30 *10^-6 /1.6*10^-19 that is (30/1.6) * 10^13 which is (3/1.6) *10...
Monday, January 7, 2008 at 6:04pm by Damon

Chemistry
How many moles of electrons are required to produce 23.8 g Cu from a CuSO4 solution?
Sunday, May 2, 2010 at 8:38am by Angel

physics
Given that the mass of an electron is 9.1 x 10^-28 grams and the charge on an electron is 1.6 x 10^-19 Coulombs, calculate the voltage required to lift an electron 5 cm. not quite sure how to do this.
Saturday, May 19, 2012 at 7:04pm by Martin

AP Chemistry
What volume of 6.48 M HNO3 is required to prepare 301 mL of a 1.2 M HNO3 solution? Answer in units of mL.
Sunday, October 24, 2010 at 2:33pm by Anonymous

Chemistry
Given the following chemical equation: 3 Cu + 8 HNO3 = 3 Cu(NO3)2 + NO + 4 H2O. How many moles of HNO3 are required to react with 6 moles of Cu?
Monday, July 14, 2008 at 2:01pm by Persia

Chemistry
Thank you! Can you further explain the significance of the placement of Ag relative to Cu in the activity series and the effect on displacing the Cu^(2+) ions in the Cu(NO3)2 solution? Or where could I find information regarding this topic?
Wednesday, March 24, 2010 at 10:22pm by Ryan

physics
I know that 1 micro-coulomb is 1*10^-6 coulombs and 1 electron has 1.60217646 * 10-19 coulombs. I'm not sure if you have to divide or multiply them? And don't you need the mass of the carpet to do it? My answers on true/false; False, it does depend on the magnitude of the ...
Monday, January 10, 2011 at 11:11pm by Jaden

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