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0
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1
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36
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How does the rate of the reaction between hydrochloric acid and sodium thiosulfate change as the temperature increases?
asked
Feb 22
in
Chemical kinetics
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votes
1
answer
38
views
What is the bond energy and bond strength of a chlorine molecule? Provide neutron scattering data to support your answer.
asked
Feb 18
in
Chemical bonding
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votes
1
answer
51
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How does the arrangement and structure of supramolecular assemblies affect their photochemical properties? Provide examples of supramolecular assemblies and their corresponding photochemical properties.
asked
Feb 17
in
PhotoChemistry
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votes
1
answer
37
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How does temperature affect the molecular ordering and behavior of liquid crystals using Monte Carlo simulations?
asked
Feb 17
in
Computational Chemistry
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1
answer
75
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How can the properties of polymer-based optical materials be controlled and optimized for various applications, such as in optical sensors or devices?
asked
Feb 10
in
Polymer Chemistry
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1
answer
48
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How can the pharmacodynamics of a drug be investigated and optimized for therapeutic efficacy while minimizing side effects in the human body?
asked
Feb 10
in
Medicinal Chemistry
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votes
1
answer
16
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How can the efficiency of the production process of paints and coatings be improved while minimizing the negative impact on the environment?
asked
Feb 7
in
Chemical engineering
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1
answer
42
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How can the bandgap of a semiconductor be calculated and manipulated for optimal performance in electronic devices?
asked
Feb 6
in
Materials Chemistry
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1
answer
44
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How can knowledge of chemistry principles be applied to real-world scenarios such as the production and use of common household items such as laundry detergent or shampoo? What are some of the key chemical processes involved in their creation and use?
asked
Feb 5
in
Chemical education
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1
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72
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Calculate the standard enthalpy change for the reaction: Fe2O3(s) + 3CO(g) → 2Fe(s) + 3CO2(g) Given the following standard enthalpy of formation values: ΔHf° [Fe2O3(s)] = -824 kJ/mol ΔHf° [CO(g)] = -110 kJ/mol ΔHf° [CO2(g)] = -393.5 kJ/mol ΔHf° [Fe(s)] = 0 kJ/mol.
asked
Feb 3
in
Chemical thermodynamics
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votes
1
answer
88
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What is the concentration of iron (Fe) in a sample of river water using spectrophotometry at a wavelength of 510 nm? Given that the absorbance value of the sample at 510 nm is 0.42, and the molar absorptivity of iron (Fe) at that wavelength is 18,000 M^-1 cm^-1.
asked
Jan 30
in
Analytical Chemistry
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1
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121
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A student wants to measure the heat of crystallization of sodium acetate trihydrate. The student takes 50 g of sodium acetate trihydrate and dissolves it in 100 ml of water at 70°C. The solution is then allowed to cool to 20°C, during which the sodium acetate trihydrate crystallizes out. The student measures the temperature change during this process and finds that the temperature drops to 45°C. What is the heat of crystallization of sodium acetate trihydrate in kJ/mol?
asked
Jan 22
in
ThermoChemistry
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1
answer
131
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A chemistry student wants to determine the effect of adding more reactant or product on the equilibrium position of a chemical reaction. The student has a 0.50 M solution of N2O4 and NO2 at equilibrium at 25°C, with the equation N2O4(g) <--> 2NO2(g). If the student adds more N2O4 to the reaction mixture, what will happen to the equilibrium concentration of NO2? Will it increase, decrease or stay the same? Justify your answer with a chemical equation and relevant calculations.
asked
Jan 22
in
Chemical equilibrium
0
votes
1
answer
116
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What is the correct IUPAC name of the following organic compound: CH3-CH2-CH(CH3)-CH2-Br?
asked
Jan 21
in
Organic Chemistry
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1
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100
views
When is the foot-in-the-door FITD technique most effective?
asked
Jan 20
in
Psychology
0
votes
1
answer
69
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According to Freud's psychoanalytic theory, how does personality develop?
asked
Jan 20
in
Psychology
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1
answer
110
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Why is it important to address stigma surrounding mental illness?
asked
Jan 17
in
Psychology
0
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1
answer
39
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What is a wait-list control?
asked
Jan 16
in
Psychology
0
votes
1
answer
38
views
What is the Cognitive Behavioural Theory?
asked
Jan 15
in
Psychology
0
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1
answer
76
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What is the dynamic systems theory of development?
asked
Jan 14
in
Psychology
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