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votes
1
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23
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What factors affect the rate of the reaction between sodium thiosulfate and hydrochloric acid, and how do they influence the rate constant?
asked
3 days
ago
in
Inorganic Chemistry
0
votes
1
answer
23
views
How does the chemical structure of detergents and cleaning agents affect their ability to remove oil-based and water-based stains from various surfaces?
asked
Feb 18
in
Surface Chemistry
0
votes
1
answer
10
views
How can we design a polymer-based smart material that undergoes a reversible color change in response to changes in temperature?
asked
Feb 12
in
Polymer Chemistry
0
votes
1
answer
41
views
How does the density functional theory calculations of electronic properties of materials change when the applied external electric field increases or decreases? Provide key factors that can affect the accuracy of the electronic property predictions.
asked
Feb 12
in
Computational Chemistry
0
votes
1
answer
36
views
What are the chemical components present in crude oil and how do they impact the environment when an oil spill occurs?
asked
Feb 12
in
Environmental Chemistry
0
votes
1
answer
51
views
How does the computational analysis of enzyme catalysis aid in the discovery of potential drug targets for the treatment of diseases? Use examples of specific enzymes and diseases to support your answer.
asked
Feb 12
in
Computational Chemistry
0
votes
1
answer
38
views
How can the surface chemistry of food and beverage processing be manipulated for better product quality and longer shelf life?
asked
Feb 11
in
Surface Chemistry
0
votes
1
answer
32
views
How can the preparation of 2,4-dinitrophenol from phenol and nitric acid be optimized to increase yield and minimize waste products?
asked
Feb 10
in
Chemical synthesis
0
votes
1
answer
35
views
How can chemistry teachers provide better support to students with learning disabilities in the classroom, in terms of instructional strategies and accommodations, to facilitate and enhance their learning and success in chemistry?
asked
Feb 5
in
Chemical education
0
votes
1
answer
47
views
How can chemistry teachers provide better support and accommodations for students with learning disabilities to effectively learn and understand chemistry concepts and apply them in laboratory experiments?
asked
Feb 5
in
Chemical education
0
votes
1
answer
48
views
Determine the standard enthalpy change of the dissolution reaction of 2.50 g of NaOH in water, given that the molar enthalpy of hydration of Na+ and OH- ions are -406.8 kJ/mol and -230.0 kJ/mol respectively. The heat capacity of the calorimeter is 25.2 J/°C and the initial and final temperatures were 24.0°C and 29.2°C respectively.
asked
Feb 4
in
Chemical thermodynamics
0
votes
1
answer
87
views
How does the ab initio calculated dipole moment of water compare to the experimental value?
asked
Jan 30
in
Computational Chemistry
0
votes
1
answer
65
views
Calculate the enthalpy of ionization of magnesium if 50 mL of 0.1 M HCl solution is added to 1 g of magnesium powder at 25°C, and the change in temperature is -10°C. The specific heat capacity of the solution is 4.18 J•g-1•K-1.
asked
Jan 23
in
ThermoChemistry
0
votes
1
answer
58
views
Calculate the enthalpy change for the reaction of 2.5 g of hydrogen gas with excess oxygen gas to produce water, given that the enthalpy of formation of water is -285.83 kJ/mol and the molar mass of hydrogen gas is 2.02 g/mol.
asked
Jan 23
in
ThermoChemistry
0
votes
1
answer
52
views
Calculate the enthalpy change for the hydrolysis of 2 moles of sucrose (C12H22O11) into glucose (C6H12O6) and fructose (C6H12O6), given the enthalpy change of hydrolysis for glucose and fructose are -2801 and -2802 kJ/mol respectively.
asked
Jan 23
in
ThermoChemistry
0
votes
1
answer
65
views
Calculate the anodic Tafel slope (in mV/decade) for the corrosion of iron in a solution containing 0.1 M HCl, given that the corrosion current density is 2.5 mA/cm2 and the exchange current density is 0.25 mA/cm2. Assume T = 25°C and the activation energy of the reaction is 40 kJ/mol.
asked
Jan 23
in
ElectroChemistry
0
votes
1
answer
42
views
When was the Wechsler Adult Intelligence Scale WAIS first published?
asked
Jan 20
in
Psychology
0
votes
1
answer
70
views
What is the role of the limbic system in emotional processing?
asked
Jan 20
in
Psychology
0
votes
1
answer
39
views
According to the cognitive theory, what is the difference between worry and anxiety?
asked
Jan 17
in
Psychology
0
votes
1
answer
40
views
What criticisms have been lodged against social exchange theory?
asked
Jan 16
in
Psychology
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