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What is the maximum amount of work that can be obtained from a chemical reaction at constant temperature and pressure, assuming perfect reversibility and no external work?
asked
Feb 20
in
Physical Chemistry
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votes
1
answer
31
views
What is the effect of temperature on the reaction sustainability of the decomposition of hydrogen peroxide catalyzed by potassium iodide?
asked
Feb 20
in
Chemical kinetics
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1
answer
30
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How does the coordination environment of metal ions affect the activity of metalloproteins and metalloenzymes? Provide examples of metalloproteins or metalloenzymes whose activity is modulated by changes in their coordination geometry.
asked
Feb 19
in
Coordination Chemistry
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1
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81
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Calculate the standard enthalpy change for the liquid-to-gas phase transition of water at 100°C and atmospheric pressure, given that the enthalpy of vaporization of water is 40.7 kJ/mol.
asked
Feb 3
in
Chemical thermodynamics
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1
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61
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How does changing the pH affect the equilibrium position of a redox reaction involving a weak acid and its conjugate base? Provide a specific example to illustrate your answer.
asked
Feb 3
in
Chemical equilibrium
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1
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149
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How can X-ray diffraction be used to analyze the crystal structure of a sample and determine its chemical composition?
asked
Jan 30
in
Analytical Chemistry
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80
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Calculate the corrosion potential of copper in seawater environment having a pH of 8.2 and a temperature of 25°C given that the standard hydrogen electrode potential is -0.76 V and the concentration of copper ions in seawater is 2.5 x 10^-5 M.
asked
Jan 23
in
ElectroChemistry
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1
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73
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Calculate the change in entropy for the reaction: 2H2(g) + O2(g) → 2H2O(g)if the standard entropy values of H2, O2, and H2O are 130.7 J/mol*K, 205.0 J/mol*K, and 188.7 J/mol*K, respectively.
asked
Jan 23
in
Inorganic Chemistry
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78
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A chemistry student wants to design an electrochemical cell that produces a voltage of at least 1.5 volts. The available electrodes are copper and aluminum. Using Faraday's law, calculate the mass of copper needed to produce the required voltage if aluminum is used as the other electrode. The specific gravity of copper is 8.96 g/cm³, and the standard reduction potential of copper and aluminum are -0.34 V and -1.66 V, respectively.
asked
Jan 22
in
Physical Chemistry
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1
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68
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A bottle contains a mixture of nitrogen and oxygen gases. At a specific temperature and pressure, the nitrogen molecules move on an average velocity of 500 m/s and oxygen molecules move at 400 m/s. What is the partial pressure of nitrogen and oxygen in the mixture if the total pressure of the gas is 1 atm?
asked
Jan 22
in
Physical Chemistry
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1
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80
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A certain polymerization reaction has a ΔH°rxn of -250 kJ/mol. If you need to make 500 grams of the polymer, how much energy in kilojoules will be released or absorbed during the reaction?
asked
Jan 22
in
ThermoChemistry
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1
answer
96
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When was the Tuskegee Syphilis Study conducted?
asked
Jan 20
in
Psychology
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1
answer
68
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According to the theory of classical Test Theory, how is the reliability of a measure measured?
asked
Jan 20
in
Psychology
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1
answer
48
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What is the influence of technology on cognitive development?
asked
Jan 20
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Psychology
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1
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54
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According to Piaget, what is the final stage of cognitive development?
asked
Jan 20
in
Psychology
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1
answer
64
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In contrast, how does existential therapy focus on the meaning of life?
asked
Jan 17
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Psychology
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1
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108
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How did Bandura's Bobo doll experiment demonstrate observational learning?
asked
Jan 17
in
Psychology
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1
answer
72
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How can the biopsychosocial model be applied to chronic pain management?
asked
Jan 16
in
Psychology
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1
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89
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What is feature detection theory?
asked
Jan 15
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Psychology
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1
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69
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Who introduced the concept of Self-Transcendence?
asked
Jan 15
in
Psychology
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