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1
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30
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How does the presence of a catalyst affect the rate of a specific heterogeneous catalyzed reaction? Provide experimental evidence to support your answer.
asked
Feb 22
in
Surface Chemistry
0
votes
1
answer
37
views
How does the polarity of the solvent affect the rate of the photochemical reaction for a specific light-sensitive compound?
asked
Feb 22
in
PhotoChemistry
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1
answer
34
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How does the molecular structure of photovoltaic materials affect their photochemical properties and efficiency in converting light energy into electrical energy?
asked
Feb 21
in
PhotoChemistry
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1
answer
37
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How does the composition of the lipid bilayer affect the surface charge density of a biomembrane?
asked
Feb 18
in
Surface Chemistry
0
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1
answer
36
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How can the efficiency of the photochemical degradation of pollutants be improved for industrial applications in water treatment facilities? What factors could potentially affect the photolysis rate of pollutants such as dyes, pharmaceuticals, and pesticides in the water?
asked
Feb 7
in
PhotoChemistry
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1
answer
34
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How can computational studies be used to predict and analyze the self-assembly behavior of supramolecular structures and their properties, such as stability and reactivity?
asked
Feb 5
in
Computational Chemistry
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1
answer
54
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How can chemistry students be better prepared for chemistry-related careers to effectively apply their education and skills to real-world situations?
asked
Feb 4
in
Chemical education
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1
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36
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How can chemistry educators provide better support for students with learning disabilities to ensure their success in the subject?
asked
Feb 4
in
Chemical education
+1
vote
1
answer
93
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Calculate the standard enthalpy of formation of potassium nitrate (KNO3) given the following information:- Heat of combustion of potassium is -468 kJ/mol- Heat of combustion of nitrogen is -940 kJ/mol- Heat of combustion of oxygen is -283.8 kJ/mol- Heat of formation of KNO3 is -383 kJ/mol.
asked
Feb 3
in
Chemical thermodynamics
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1
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74
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Calculate the standard enthalpy change for the phase transition reaction of solid water (ice) at -10°C into liquid water at 25°C if the enthalpy of fusion of ice is 6.01 kJ/mol and the specific heat capacity of ice and liquid water are 2.09 J/g°C and 4.18 J/g°C, respectively.
asked
Feb 3
in
Chemical thermodynamics
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votes
1
answer
67
views
Calculate the standard electrode potential for the redox reaction between the half cells Ag/Ag+ and Cu2+/Cu at 25°C, given that the standard electrode potentials for the half cells are +0.80 V and +0.34 V respectively.
asked
Feb 3
in
Chemical thermodynamics
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1
answer
55
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Calculate the overpotential for the reduction reaction of Ag+ to Ag on a silver electrode at 25°C with a current density of 0.5 A/cm2. The standard reduction potential of Ag+ to Ag is 0.799 V vs. the standard hydrogen electrode. The activation energy for this reaction is 65.0 kJ/mol, the transfer coefficient is 0.4 and the reaction order is 1.5.
asked
Feb 3
in
ElectroChemistry
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votes
1
answer
106
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What is the difference between aldehydes and ketones in terms of their functional groups and reactivity? Provide examples of aldehydes and ketones commonly found in household products and explain their uses.
asked
Jan 31
in
Organic Chemistry
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votes
1
answer
106
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How can students and instructors work together to increase awareness and implementation of safety protocols in chemistry labs to prevent accidents and ensure a safe learning environment?
asked
Jan 30
in
Chemical education
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votes
1
answer
74
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A student wants to calculate the corrosion rate of a zinc electrode in contact with a copper electrode, with a measured current of 0.5 amperes and a surface area of 2 cm². Given that the standard reduction potentials for copper and zinc electrodes are +0.34 V and -0.76 V, respectively, what is the corrosion rate of the zinc electrode in millimeters per year? (Assume a density of 7.14 g/cm³ for zinc and a Faraday constant of 96,500 coulombs per mole).
asked
Jan 22
in
ElectroChemistry
0
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1
answer
90
views
A student needs to calculate the Faraday constant for the reduction of copper ions in a solution using a current of 2.5 amperes for 5 minutes. If the mass of copper deposited on the cathode was 0.3 grams, what is the value of the Faraday constant?
asked
Jan 22
in
ElectroChemistry
0
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1
answer
83
views
According to the cognitive-behavioural model, what is the best way to treat phobias?
asked
Jan 20
in
Psychology
0
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1
answer
101
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How does the Strengths-Based Perspective contribute to end-of-life care?
asked
Jan 20
in
Psychology
0
votes
1
answer
31
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According to Lawrence Kohlberg's theory of moral development, what are the three levels of moral reasoning?
asked
Jan 20
in
Psychology
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1
answer
85
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How does the concept of positive organisational behaviour relate to positive psychology principles?
asked
Jan 20
in
Psychology
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