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Electromagnetism
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A voltaic cell is constructed with two silver-silver chloride electrodes, each of which is based on the following half-reaction: AgCl(s)+e- = Ag(s)+Cl-(aq) The two cell compartments have (Cl-) = 1.45 * 10^-2 M and (Cl-) = 2.80 M, respectively. a) Which e
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Electromagnetism
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Explain why a soft-iron core increases the strength of an electromagnet.
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Electromagnetism
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How much sulfuric acid is in a car battery?
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Electromagnetism
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State two ways by which the strength of an electromagnet can be increased.
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Electromagnetism
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Cyclic voltammetry was used to study the response of an aqueous 1.46 mM solution of Ferrocyanide, Fe(CN)6^{4-} at a 2.5 mm diameter electrode. KCl was present at a level of 1.0 M as supporting electrolyte. Four CVs were run at various scan rates producing
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Electromagnetism
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How is electricity produced from magnetism?
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Electromagnetism
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The Vernier pH sensor functions by measuring a voltage between two electrochemical cells and converts that to a pH value. One half of the electrochemical cell is the solution that is being tested, and the other half is a Ag-AgCl cell within the sensor.
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Electromagnetism
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In the copper-silver cell, why must the Cu^{2+} and Ag^+ solutions be kept separate in containers?
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Electromagnetism
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You can make an electromagnet by wrapping a wire around a wire and connecting the ends to a battery. If the battery is connected so that current wraps up in the front and down in the back, which direction will the magnetic field of the nail point? Explain
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Electromagnetism
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What is the standard cell potential ( E c e l l ) for the voltaic cell based on the reaction below? S n 2 + ( a q ) + 2 F e 3 + ( a q ) 2 F e 2 + ( a q ) + S n 4 + ( a q ) A) +0.46 V B) +0.617 V C) +1.39 V D) -0.46 V E) +1.21 V
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Electromagnetism
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If an aluminum strip were placed in a tin(II) solution, what would you observe? A. The aluminum strip would dissolve B. Tin metal will plate out on the aluminum strip C. No reaction D. A and b
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Electromagnetism
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A very thin, infinitely long metal sheet lies in the xy-plane, between x = -w and x = w. A current of density h A/m flows in the +y-direction. What are the magnitude and direction of the magnetic field at a distance z – w above and below the sheet? Neglec
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Electromagnetism
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The Vernier pH sensor functions by measuring a voltage between two electrochemical cells and converts that to a pH value. One half of the electrochemical cell is the solution that is being tested, and the other half is an Ag-AgCl cell within the sensor. W
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Electromagnetism
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What is a Crookes tube?
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Electromagnetism
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How much current must pass through a horizontal power transmission cable in order for the magnetic field at a location 29 m directly below it to be equal to the Earth’s magnetic field, (a) Which is ap
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Electromagnetism
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Calculate delta G knot in kj/mol for the reaction AL(s)+ 3Ag^+(aq) –>Al^3+(aq)+3Ag(s), given that E knot = -1.66 V and Eknot =.80 V
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Electromagnetism
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In electrochemistry, spontaneous redox reactions are used for what purpose?
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