1. science

    What energy changes occur in an electrochemical cell when electric current flows from it? This is what I put down but I am not sure if it is right... In a primary cell, chemical reactions use up some of the materials in the cell as electrons flow from it.

    asked by helpmeplease on December 10, 2007
  2. Science

    Match these with the key terms (1) A form of energy that is always transferred from a warmer substance to a cooler one. (2) device that converts hear to a small amount of electric energy often used in temperature sensors. (3) A Push button barbecue lighter

    asked by Aurore on December 2, 2013
  3. chemistry

    an electrochemical cell uses Al and Al+3 in one compartment and Ag and Ag+ in the other write a balanced equation for the rxn that will occur spontaneously in this cell would that just be Al + Al+3 + 2e --> Ag + Ag+ ?

    asked by erin on January 18, 2009
  4. Assist me Plzz!

    What is the p.d. between 2 points in a circuit if 200J of electrical energy are changed to other forms of energy when 25 coulombs of electric charge pass? If the charge flows in 10 seconds, what is the current? Science help needed here. Vq=energy you know

    asked by Demola on April 17, 2007
  5. chemistry

    1)) The following two half-cells are paired up in a voltaic cell. How will lowering the pH affect the E of the overall cell? ClO3-(aq) + H2O(l) + 2e- ==> ClO2-(aq) + 2OH-(aq) Eo= 0.35 V I2(S) + 2e-==> 2I-(aq) Eo = 0.54 V A)dE will increase B)dE will

    asked by Val on March 23, 2010
  6. Chemistry

    1)) The following two half-cells are paired up in a voltaic cell. How will lowering the pH affect the E of the overall cell? ClO3-(aq) + H2O(l) + 2e- ==> ClO2-(aq) + 2OH-(aq) Eo= 0.35 V I2(S) + 2e-==> 2I-(aq) Eo = 0.54 V A)dE will increase B)dE will

    asked by Val on March 23, 2010
  7. Chemistry --Need Help!!

    Ive posted twice, but no one's answered yet...I could really use any kind of guidance--particularly for the 1st question :) 1)) The following two half-cells are paired up in a voltaic cell. How will lowering the pH affect the ƒ´E of the overall cell?

    asked by Val on March 24, 2010
  8. Chemistry

    3. The diagram shows an electrochemical cell with a gold strip (left) and aluminum glasses (right). In your response, do the following: • Label the cathode and the anode, including the charge on each. • Show the flow of electrons. • Describe what

    asked by kat on May 13, 2016
  9. chemistry

    consider the following electrochemical cell: Pt(s) | Hg2^2+ (0.250M), Hg^2+ (0.800M) || MnO4^-(0.650M), H^+ (1.00M), Mn^2+ (0.375M) | Pt(s) Using the half-reaction method, write a balanced chemical equation for the electrochemical cell.

    asked by Help Please!!!! on August 26, 2018
  10. chemistry

    Which of the following half-reactions would occur at the anode of an electrochemical cell? A. H+(aq) + Cl− (aq) → HCl(aq) B. Li+(aq) + e− → Li(s) C. Cu+(aq) + e− → Cu(s) D. Cu(s) → Cu+(aq) + e−

    asked by Morgan on October 20, 2014
  11. chemistry

    What is the difference between a galvanic cell and an electrolytic cell? A. A galvanic cell converts reduction reactions into an electrolytic cell, and an electrolytic cell converts oxidation reactions into a galvanic cell. B. A galvanic cell converts

    asked by Morgan on October 20, 2014
  12. electricity

    When all parts of a circuit are composed of conducting materials, the circuit is said to be? closed? Complete? Better than the alternative? when an electric current flows through along conductor, each free electron moves: when an electric current flows

    asked by erin on December 3, 2006
  13. chemistry

    need help drawing an electrochemical cell that could be used to plate zinc onto other metals.labeling cathode and anode, and reactions that occur.

    asked by anonymous on May 11, 2016
  14. Chemistry: Please check answers

    12. What balances charges that may build up as reduction and oxidation occur in a voltaic cell? *the salt bridge one of the half-cells the electrolyte solutions the moving electrons 13. What is the electrode in the center of the most common dry cell made

    asked by Cassie on April 9, 2013
  15. biology urgent

    Glucose is transported into a cell through a process of co-transport, where it is moved against its concentration gradient through a membrane channel. Moving any molecule against its concentration gradient requires energy, but these glucose channels do not

    asked by alex on May 21, 2013
  16. chemistry

    The reaction described by the equation Zn + Hg2Cl2 2Hg +Zn+2 + 2Cl is run on electrochemical cell. The E^0 of the cell at 25 degrees C is 1.03V. In the same cell, [Cl-]=.10 M and [Zn+2] is unknown, and the measured cell voltage is 1.21V. Compute the value

    asked by Dylan on April 12, 2012
  17. Physics

    Electric charge flows through a wire, which naturally has a cylindrical cross section. Suppose the charge has a current density given by J = A/r, where A is a constant and r is the distance to the wire's central axis. How much current flows through the

    asked by Lindsey on March 18, 2013
  18. chemistry

    The electrochemical cell described by the cell notation has a standard emf (electromotive force) of -0.68 V. Calculate the value (kJ) for the standard free energy change of the cell. Round your answer to 3 significant figures. Pt(s) l MnO2(s) l MnO4-(aq),

    asked by me on June 6, 2010
  19. chem

    Explain, in terms of electrical energy, how the operation of a voltaic cell differs from the operation of an electrolytic cell used in the Hall process. Include both the voltaic cell and the electrolytic cell in your answer. Would this be correct: In a

    asked by Anonymous on April 20, 2009
  20. Physical Science

    ok so i keep getting one wrong on a 4 question test and failing so can someone tell me what im getting wrong 1. What causes an electric current in a wire? A. Electric fields cause atoms to move in the wire. B. Electrons flow because of electrical

    asked by s on March 1, 2013
  21. physics

    A typical photovoltaic cell delivers 3.8×10−3 {\rm W} of electric energy when illuminated with 0.14 {\rm W} of light energy. what is the energy efficiency of the cell?

    asked by please help on January 8, 2012
  22. Physics

    Water flows through a pipe of radius 4 cm at a rate of 3.5 m/s. Suppose each water molecule is singly ionized (highly unrealistic). a) What is the electric current density associated with the flow of these ions? b) What is the electric current in the pipe?

    asked by Jake on July 10, 2017
  23. Physics

    Water flows through a pipe of radius 4 cm at a rate of 3.5 m/s. Suppose each water molecule is singly ionized (highly unrealistic). What is the electric current density associated with the flow of these ions? What is the electric current in the pipe?

    asked by Lindsey on March 18, 2013
  24. Biology

    Miguel is on the hockey team at school. He is at practice when the coach asks him to cover the goal. How does the nervous system respond to Miguel needing to change direction while skating? A . For any movement in Miguel to occur, first a message or

    asked by Caitlyn on January 7, 2019
  25. Chemistry

    Electrochemisry. Candy Chemist wishes to determine the concentration of CrO4^2- by electrochemical means in solution, and subsequently the Ksp of Ag2CrO4. She sets up one half-cell comprised of the Ag+|Ag couple (E=+0.799V) and a second half-cell in which

    asked by KRH on April 28, 2016
  26. Physics

    In a typical living cell, the electric potential inside the cell is 0.070 V lower than the electric potential outside the cell. The thickness of the cell membrane is 0.10µm. What is the magnitude and direction of the electric field (E) within the cell

    asked by Nina on March 30, 2013
  27. Physics/Eletrical engineering

    Which of the following is a conducting loop in which electrons carrying electric energy may be transferred from a suitable source to do a useful work and returned to the source? a.) Direct current b.) Indirect current c.) Electric circuit d.) source of

    asked by A-Yo on February 17, 2016
  28. Science

    describe how a simple electrochemical cell operates? how are electrochemical cells related to batteries?

    asked by Bob on May 28, 2008
  29. CHEMISTRY

    The half-cell, Tl | Tl+(1 mol L-1), is connected to a Pt | H+ | H2(1 atm) half-cell in which the concentration of H+ is unknown. The measured cell voltage is 0.0841 V and the Pt | H2 | H+ half-cell is the cathode. Standard reduction potentials are given on

    asked by sabrina: Anyone know how to answer this? on November 28, 2012
  30. CHEMISTRY

    The half-cell, Tl | Tl+(1 mol L-1), is connected to a Pt | H+ | H2(1 atm) half-cell in which the concentration of H+ is unknown. The measured cell voltage is 0.0841 V and the Pt | H2 | H+ half-cell is the cathode. Standard reduction potentials are given on

    asked by sabrina: Can someone please help! on November 28, 2012
  31. CHEMISTRY

    The half-cell, Tl | Tl+(1 mol L-1), is connected to a Pt | H+ | H2(1 atm) half-cell in which the concentration of H+ is unknown. The measured cell voltage is 0.0841 V and the Pt | H2 | H+ half-cell is the cathode. Standard reduction potentials are given on

    asked by sabrina on November 27, 2012
  32. Biology

    A researcher applies a drug that interferes with polymerization and depolymerization of microtubules. What would you predict about the cell’s ability to go through cell division? A. The cell division process would not be affected. B. Cell division would

    asked by Mary Jane on October 15, 2018
  33. Physics-Ohms Law

    Will you check my answers please? A volt is a unit of current and an amprere is a unit of current. It is common to call electric potential difference- voltage A current of 1 ampere is a flow of charge at the rate of 1 coulomb per second. When a charge of

    asked by Jennifer on October 24, 2007
  34. Physics

    A typical photo-voltaic cell delivers 4.2×10^−3W of electric energy when illuminated with 0.15W of light energy. What is the efficiency of the cell?

    asked by Anonymous on December 4, 2012
  35. Physics

    A typical photovoltaic cell delivers 4.2×10−3 W of electric energy when illuminated with 0.15 W of light energy. What is the efficiency of the cell?

    asked by benjamin on October 12, 2017
  36. Chemistry

    The diagram shows an electrochemical cell with a gold strip (left) and aluminum glasses (right). In your response, do the following: • Label the cathode and the anode, including the charge on each. • Show the flow of electrons. • Describe what type

    asked by kat on May 13, 2016
  37. Physics

    When a nerve cell depolarizes, charge is transferred across the cell membrane, changing the potential difference. For a typical nerve cell, 9.0 pC of charge flows in a time of 0.50ms. What is the average current(Value and units)?

    asked by Anthony on February 17, 2010
  38. Chemistry

    the corrosion of iron is similar to the reactions that occur in an electrochemical cell. Oxidation and reduction occur at separate places on the metal and the circuit is completed by an electrolyte in solution one possible corrosion is Fe(s)+O2(g) + H2O(l)

    asked by ryan on November 30, 2011
  39. electricity

    the function of a capacitor in an electric circuit is to? A)allow current flow between its plates. B)measure the amount of current in the circuit. C)increase circuit power. D) store electric charges. A and D are both correct, if you include in "current

    asked by angela on August 23, 2005
  40. physics

    Water flows over Victoria Falls, which is 128 m high, at a rate of 1.4 x 106 kg/s. If half the potential energy of this water were converted into electric energy, how much electric power would be produced by these falls?

    asked by katie on March 4, 2010
  41. Physics

    Need help matching the numbers to a - f. I need some explanations to understand. 4. The water enters the pump at a low pressure and the pump does work on the water to eject it at high pressure and with more energy. 5. The water pump provides the motive

    asked by |-/ on March 18, 2018
  42. chemistry

    Calculate the standard cell potential for each of the electrochemical cells? 2Ag+(aq)+Pb(s)→2Ag(s)+Pb2+(aq) E∘cell......V? 2ClO2(g)+2I−(aq)→2ClO−2(aq)+I2(s) E∘cell......V? O2(g)+4H+(aq)+2Zn(s)→2H2O(l)+2Zn2+(aq) E∘cell......V?

    asked by John on April 11, 2014
  43. physics

    Need help matching the numbers to a - f. 4. The water enters the pump at a low pressure and the pump does work on the water to eject it at high pressure and with more energy. 5. The water pump provides the motive force that pushes water through the pipes.

    asked by help on May 19, 2019
  44. Physics repost

    A current of 5.0 A flows for 20.0 minutes through a bulb and delivers 15000 J of electric energy to the bulb. What is the potential difference across the bulb? A)2.5 V B)4 V C)100 V D)100 V (book typo) I was told to do this: energy= V*I*time in seconds

    asked by Jon on April 9, 2008
  45. Chemistry

    Calculate the standard cell potential for each of the electrochemical cells? What would the answers be to something like this? If someone could work out the answer I would really appreciate it. My online hw keeps telling me its wrong.

    asked by John on April 12, 2014
  46. Chemistry

    Calculate the standard cell potential for each of the electrochemical cells? What would the answers be to something like this? If someone could work out the answer I would really appreciate it. My online hw keeps telling me its wrong.

    asked by John on April 12, 2014
  47. Chemistry

    How would you start and finish these questions by a step by step process? Does Amp equal to Joules? 1. How many grams of aluminum can be produced by the electrolysis of aqueous aluminum chloride by a current of 5.00 amps for 5.00 hours? 2. Consider the

    asked by Erika on April 6, 2014
  48. chemistry

    The electrochemical cell described by the cell notation has a standard cell potential of -0.35 V. Calculate the Wmax (kJ) the cell has done if 1893.5 g of MnO42-(aq) (Molar Mass - 118.94 g/mol) forms. Round your answer to 3 significant figures. Pt(s) |

    asked by eng on June 4, 2010
  49. science

    why is the electron the part of the atom that moves when an electric current flows?

    asked by jacob on May 23, 2008
  50. physics

    A typical cell membrane is 8.0 nm thick and has an electrical resistivity of 1.3 × 107Ω.m. (i) If the potential difference between the inner and outer surfaces of a cell membrane is 75 mV, how much current flows through a square area of membrane on a

    asked by Jason on October 15, 2014
  51. physics

    A typical cell membrane is 8.0 nm thick and has an electrical resistivity of 1.3 × 107Ω.m. (i) If the potential difference between the inner and outer surfaces of a cell membrane is 75 mV, how much current flows through a square area of membrane on a

    asked by maranda on October 15, 2014
  52. Physics

    Remember the Poynting vector? The magnitude of this vector gives the amount of energy per second that flows through a unit area (in the direction it gives) because of the presence of a combination of electric and magnetic field, like in an electro-magnetic

    asked by Ryan on October 14, 2015
  53. Science

    a. A human cell is placed in a container of sugar water. Explain what would occur, if the cell membrane is impermeable to sugar. b. Another cell is placed into a container of sugar water. However, this cell has the capability to allow large molecules such

    asked by Eliza on October 11, 2015
  54. Biology

    a. A human cell is placed in a container of sugar water. Explain what would occur, if the cell membrane is impermeable to sugar. b. Another cell is placed into a container of sugar water. However, this cell has the capability to allow large molecules such

    asked by Eliza on October 3, 2015
  55. Physics

    1)A 15.0 resistor and a 20.0 resistor are connector in parallel. A 5.00 resistor is connected in series with this parallel arrangement. The resistors are connected across a 1.00(I think something else is suppose to be after that but its missing)10^2-V

    asked by Jon on April 9, 2008
  56. Science

    How does an electrical current in a circuit produce thermal, sound, and magnetic energy? The electrical current flows through devices that convert the electrical energy to mechanical or electomagnetic waves. i have a science project do tommorrow but i need

    asked by SasukeUchihaFanatic on March 29, 2007
  57. chemistry(check my steps)

    The electrochemical cell described by the cell notation has a standard cell potential of -0.35 V. Calculate the Wmax (kJ) the cell has done if 1893.5 g of MnO42-(aq) (Molar Mass - 118.94 g/mol) forms. Round your answer to 3 significant figures. Pt(s) |

    asked by eng on June 3, 2010
  58. Physics

    An electric current of 50 +/- 1 mA flows through an electric bulb filament that has a resistance of 10 +/- 2 ohm. Estimate the power dissipated by the filament and the associated error in the power.

    asked by Robert on January 26, 2012
  59. Chemistry Please help!!

    An electrochemical cell that uses the reaction Ti^3+ + 2Cr^2+ -> Ti^1+ + 2Cr^3+ Has a standard cell potential of E¢ªcell = +1.19V a. Write the two half-cell reactions. b. Determine the E¢ªred(reduction).

    asked by Anna on April 16, 2011
  60. CHEMISTRY HELP PLEASE!!!

    The cell potential of the following electrochemical cell depends on the pH of the solution in the anode half-cell: Pt(s)|H2(g,1atm)|H+(aq,?M)||Cu^2+(aq,1.0M)|Cu(s) what is the pH of the solution if Ecell is 375 mV? I first got .65 as my pH, but it said

    asked by clara on March 30, 2013
  61. Physics

    an electric cell of internal resistance of 0.5Π deliver a a current of 2.0A when resistance of 3Πis connected across it. the emf of the cell is

    asked by Poppy on May 15, 2019
  62. Biology

    9. a molecule shaped like a spiral staircase (double helix) is a typical of a. deoxyribonucleic acid b. ribonucleic acid c. carbohydrates d. both a and b D? 10. ATP is important to living organisms because it a. stores hereditary information b. stores

    asked by mysterychicken on January 20, 2010
  63. Biology

    9. a molecule shaped like a spiral staircase (double helix) is a typical of a. deoxyribonucleic acid b. ribonucleic acid c. carbohydrates d. both a and b D? 10. ATP is important to living organisms because it a. stores hereditary information b. stores

    asked by mysterychicken on January 21, 2010
  64. Chemistry

    A solution of H2SO4 was electrolyzed using the inert platinum electrodes. A) Write the balanced half-reactions for the anode and cathode in this cell. B) How many coulombs passed through the cell in 90 minutes at 8.0 amperes? C) How many moles of electrons

    asked by Melanie on January 6, 2013
  65. chemistry

    A balanced equation that represents an overall cell reaction is shown. Choose the cell notation which corresponds to the electrochemical cell that is described by this equation. 2H2O(l) → 2H2(g) + O2(g) i don't get why the answer is this. How can OH-

    asked by eng on June 3, 2010
  66. chemistry

    I did a lab using an electrochemical cell to establish a relationship between cell potential and concentration. I derived two equations from lines of best fit. One is Cell potential of Ag vs. Cu Concentration: y = -0.04520x+0.5515. The other is cell

    asked by Morgan on November 10, 2010
  67. analytical chemistry

    Shown below is a diagram of an electrochemical cell. Write the shorthand, or schematic, notation for this cell

    asked by yara on May 4, 2013
  68. Chemistry

    What is E° of the cell if an electrochemical cell consisted of: Pb|Pb2+ (0.50M)||Au3+(0.10M| Au°

    asked by sea lively on August 17, 2018
  69. Chemistry

    The reduction potentials for the species involved in an electrochemical cell are as follows: M+ + e– => M is 0.20 V J+ + e– => J is 1.00 V. All solutions are 1.00 M and J+ J is connected to M+ M What is E*cell (in V)? * is a 0. It stands for E not

    asked by Tom on July 10, 2008
  70. Chemistry

    The reduction potentials for the species involved in an electrochemical cell are as follows: M+ + e– => M is 0.20 V J+ + e– => J is 1.00 V. All solutions are 1.00 M and J+ J is connected to M+ M What is E*cell (in V)? * is a 0. It stands for E not

    asked by TOM on July 12, 2008
  71. Batteries - Engineering

    Here we consider instead dissolving guns (which we will assume are pure iron) with sulfuric acid. Fe+H2SO4->FeSO4+H2 It is apparent that they must use an outside source of electrical power to drive the dissolution of the iron. They use a small current so

    asked by Chris on December 18, 2013
  72. Chemistry

    Provide the balanced reaction, the value of K, and E(cell) at equilibrium for the for the electrochemical cell created from the two half-cell reactions below Cr^(3+) + e ==> Cr^(2+) Fe^(2+) + 2e ==> Fe Well, I got the balanced reaction: 2Cr^(2+) + Fe^(2+)

    asked by Nora on March 18, 2015
  73. Chemistry

    Determine the mass of chlorine produced when 200A of current flows for 24 hours through a cell of molten NaCl.

    asked by kat on January 18, 2017
  74. Physics

    Photons of energy 12eV are incident on a metal. It is found that current flows from the metal until a stopping potential of 8.0V is applied. What would happen if the wavelength of the incident photons was tripled? Would the energy be 4eV,so 12/3=4, and

    asked by Sheila on April 22, 2013
  75. Physics

    Photons of energy 12eV are incident on a metal. It is found that current flows from the metal until a stopping potential of 8.0V is applied. What would happen if the wavelength of the incident photons was tripled? Would the energy be 4eV,so 12/3=4, and

    asked by Sheila on April 23, 2013
  76. Physics Please help out

    Photons of energy 12eV are incident on a metal. It is found that current flows from the metal until a stopping potential of 8.0V is applied. What would happen if the wavelength of the incident photons was tripled? Would the energy be 4eV,so 12/3=4, and

    asked by Sheila on April 24, 2013
  77. Physics conceptional question Please help

    Photons of energy 12eV are incident on a metal. It is found that current flows from the metal until a stopping potential of 8.0V is applied. What would happen if the wavelength of the incident photons was tripled? Would the energy be 4eV,so 12/3=4, and

    asked by Sheila on April 24, 2013
  78. Solar Energy Please Help

    Figure 1 shows a simplication of the AM1.5 solar spectrum at 1000W/m2. The spectrum is divided in three spectral ranges: A for 0nm

    asked by Anonymous on October 26, 2013
  79. BIology

    A cell cycle is exposed to intensive UV irradiation that results in damage to the cells DNA. Shortly after UV exposure, the cell receives signals telling it to undergo cell division. What are the most likely next events to occur in the cell? A- The cell

    asked by Anonymous on November 24, 2009
  80. chemistry

    Why is it that an electrochemical cell(galvanic cell) cannot operate forever?

    asked by LALA on February 20, 2010
  81. physics

    please check these for me: When a positive charge moves in the direction of the electric field, what happens to the electrical potential energy associated with the charge? a. it increases b. it decreases c. it remains the same d. it sharply increases, and

    asked by physics on March 12, 2009
  82. Chemistry

    Study the two half reactions of an electrochemical cell. Ag(s) → Ag^+(aq) + e^– E^0 = 0.80 V Cu(s) → Cu^2+(aq) + 2e^– E^0 = 0.34 V Which option correctly gives the standard cell potential of Ag^+(aq) + Cu (s) → 2Ag(s) + Cu^2+(aq) reaction? The

    asked by Summer on April 5, 2018
  83. Chemistry

    Calculate the standard cell potential for each of the following electrochemical cells. Ni^+2(aq)+Mg(s)--->Ni(s)+Mg^+2(aq) I used the e cell values from the back of my book. They are: Ni^+2(aq)+2e--->Ni(s) E^0= -0.23 V Mg^+2(aq)+2e--->Mg(s) E^0= -2.37 I did

    asked by Eddie on April 18, 2010
  84. Science

    My question is, What was the function of a capacitor in an electric current? Could someone please help me I ruled out one of my theorys already and that was to increase circuit power. Was it to allow current flow between its plates? Was it to measure the

    asked by schoolfreak on November 11, 2011
  85. Physics

    A certain "brand-new" (never-used) 9.0 volt cell contains 40mC of charge. The Electric energy "stored" in the cell amounts to about (___) joules. 0.0 0.06 37.5 .36 60x10^-4 I'm not too sure how to figure this problem out. I initially thought 40/9, but the

    asked by Amber on February 5, 2011
  86. Physics

    An electric eel develops a potential difference of 460 V, driving a current of 0.80 A for a 1.0 ms pulse. Find the power of this pulse. Find the total energy of this pulse. Find the total charge that flows during the pulse.

    asked by Anthony on February 17, 2010
  87. Chemistry

    Constants The following values may be useful when solving this tutorial. Constant Value E∘Cu 0.337 V E∘Fe -0.440 V R 8.314 J⋅mol−1⋅K−1 F 96,485 C/mol T 298 K Part A In the activity, click on the E∘cell and Keq quantities to observe how they

    asked by Jasper on March 28, 2018
  88. Chemistry

    Write the equations describing the electrode reactions and the net cell reaction for this electrochemical cell containing tin and silver: Sn(s)|Sn2 (aq)||Ag (aq)|Ag(s) what is the equation for cathode, anode, and net cell reaction

    asked by Katie on February 27, 2012
  89. Chemistry

    Write the equations describing the electrode reactions and the net cell reaction for this electrochemical cell containing tin and silver: Sn(s)|Sn2 (aq)||Ag (aq)|Ag(s) what is the equation for cathode, anode, and net cell reaction

    asked by Katie on February 27, 2012
  90. chemistry

    Give the cell diagram notation of the electrochemical cell that could be used to determine experimentally the dissociation constant (Kw) of water. The standard reduction potential for: O2 + 2H20 + 4e- ---------> 4 OH- 0.40 V

    asked by anne on March 9, 2010
  91. Physical Science

    Need help with these questions- 1.What causes an electric current in a wire? A.Electric feilds cause atoms to move in the wire B.Electrons flow because of electrical attraction and repulsion C.Electrons move because of heat D.Electrons build up in the wire

    asked by mysterychicken on May 11, 2009
  92. Chemistry Cell notations

    Enter the balanced chemical equation including states that describes the electrochemical cell that is represented by the cell notation as shown. Pt(s) l H2O(l) l O2(g) l H+(aq) ll H+(aq), Cr2O72-(aq), Cr3+(aq) l Pt(s)

    asked by Confused on December 2, 2010
  93. Chemistry

    An electrochemical cell that uses the reaction Ti^3+ + 2Cr^2+ -> Ti^1+ + 2Cr^3+ Has a standard cell potential of E¢ªcell = +1.19V a. Write the two half-cell reactions. b. Labeling all parts and show the direction of flow of electrons. (Place the anode

    asked by Anna on April 15, 2011
  94. Electricity

    when an electric current flows through a long conductor, each free electron moves? A)from one end of the conductor to the other end. B)with a speed of 300,000,000 m/s. C)back and forth between the ends of the conductor. D)through a relatively short

    asked by angela on August 20, 2005
  95. CHEMISTRY

    The two half-reactions for the LeClanche dry cell battery are shown below. Describe the direction of spontaneous electron flow in this electrochemical cell. Zn(s) ---> Zn2+(aq) + 2e- 2NH4+(aq) + 2e- ---> 2NH3(g) + H2(g)

    asked by Alicia on May 10, 2013
  96. Chemistry

    Is electroplating an industrial electrochemical process? What would be an industrial electrochemical process?? electric generator or electrolysis?

    asked by scilover on May 20, 2013
  97. chemistry

    What am I doing wrong? If a current of 54 A flows into a cell for 45 minutes 30 s, determine the mass of chronium deposited. My answer: 54 x 2730 s = 147420 147430/96485 = 1.52 mols m = n x M =1.52 x 52 = 79.5

    asked by Amandeep on April 22, 2008
  98. Physics

    Name the energy transfers which occur when. An electric bell rings

    asked by Icon on October 20, 2018
  99. Functions/Logarithims

    Energy is needed to transport a substance from outside a living cell to inside the cell. This energy is measured in kilo calories per gram molecule, and is given by E = 1.4 log (C1) / (C2 where C1 represents the concentration of the substance outside the

    asked by Steph on March 8, 2012
  100. Biology

    a. A human cell is placed in a container of sugar water. Explain what would occur, if the cell membrane is impermeable to sugar. I know that the water in the cell is the high concentration and will go to the sugar water which is the low concentration. b.

    asked by Judy on October 5, 2015