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Here is a precise problem for the student to solve:A copper electrode is placed in a solution of copper nitrate with a concentration of 0.1 M, while a platinum electrode is placed in a solution of hydrogen peroxide. The potential difference of the half-reactions for the copper/copper(II) and hydrogen peroxide/water couples are +0.34 V and +1.77 V, respectively. Calculate the current density (in A/m²) at the copper electrode when a current of 0.25 A is passed through the cell for 10 minutes.
asked
Feb 4
in
ElectroChemistry
1
answer
27
views
Calculate the standard entropy change for the reaction 2H2(g) + O2(g) → 2H2O(g) given the standard entropy values of H2(g) = 130.6 J/mol K, O2(g) = 205.0 J/mol K, and H2O(g) = 188.8 J/mol K. Also, determine whether the reaction is spontaneous or not at 298 K.
answered
Feb 3
in
Inorganic Chemistry
1
answer
46
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Calculate the heat of formation of carbon dioxide (CO2) using the following information: The heat of formation of carbon monoxide (CO) is -110.5 kJ/mol and the heat of formation of water (H2O) is -285.8 kJ/mol.
asked
Jan 23
in
Chemical bonding
1
answer
55
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Calculate the equilibrium constant for a reaction involving a weak oxidizing agent where the concentration of the oxidizing agent is 0.1 M and the concentration of the reduced species is 0.05 M at equilibrium. The balanced chemical equation of the reaction is given as follows:OX + 2 e- ⇌ REDwhere OX is the weak oxidizing agent and RED is the reduced species.
asked
Jan 23
in
Chemical equilibrium
1
answer
65
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A student wants to determine the concentration of silver ions (Ag+) in a solution. Using an Ag/Ag+ reference electrode, the student measures the cell potential to be +0.56 V when the solution is electrolyzed for 25 minutes at a constant current of 0.50 A. The volume of the solution is 150 mL. What is the concentration of silver ions in the solution in mol/L?
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Jan 22
in
ElectroChemistry
1
answer
68
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When might mindfulness-based interventions be useful?
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Jan 20
in
Psychology
1
answer
68
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What is the biological theory explanation for borderline personality disorder?
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Jan 17
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Psychology
1
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34
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Who proposed the theory of top-down processing?
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Jan 15
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Psychology
1
answer
64
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What is the impact of anxiety on daily functioning?
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Jan 14
in
Psychology
1
answer
38
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When boron10 absorbs a neutron, what does it emit?
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Jan 8
in
Science
1
answer
8
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What is the protist kingdom sometimes called as?
asked
Jan 7
in
Science
1
answer
28
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What is controlled by regulatory proteins that bind to regulatory elements on dna?
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Jan 6
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Science
1
answer
39
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The process of producing mature sperm is called what?
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Jan 2
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Science
1
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49
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The presence of what in leaf cells makes most leaves appear green?
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Dec 27, 2024
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Science
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