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Answers by LesleyTharp
0
votes
39
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How does the absorption of light by a molecule lead to the excited state dynamics and what is the role of ab initio calculations in understanding this process?
answered
Feb 17
in
Computational Chemistry
0
votes
36
views
What is the effect of surface coverage on the electronic properties of a metal surface, as predicted by density functional theory calculations?
answered
Feb 14
in
Computational Chemistry
0
votes
33
views
What is the difference between primary, secondary, and tertiary amines, and how does their basicity compare? Additionally, give an example of a common amine that is used in everyday products and explain its function.
answered
Feb 14
in
Organic Chemistry
0
votes
60
views
What are the photochemical properties of Eu(DBM)3Phen in solution, and how does the presence of oxygen affect its photoluminescence behavior?
answered
Feb 13
in
PhotoChemistry
0
votes
48
views
How can the photochemical degradation of pollutants in the environment be optimized using advanced oxidation processes and what are the mechanisms involved?
answered
Feb 10
in
PhotoChemistry
0
votes
42
views
How can the design of a heat exchanger be optimized to increase the efficiency of the process in a chemical plant that produces ethylene using a catalytic cracker? Consider the specific heat transfer requirements, flow rates, pressure drops, and heat exchange surfaces for the system.
answered
Feb 6
in
Chemical engineering
0
votes
32
views
How can coordination chemistry principles be applied to design more efficient chelating agents for the treatment of heavy metal poisoning in humans?
answered
Feb 5
in
Coordination Chemistry
0
votes
44
views
How can chemistry be applied to address economic and societal challenges, such as developing sustainable and environmentally-friendly technologies, improving healthcare systems, and creating new materials for various industries?
answered
Feb 4
in
Chemical education
0
votes
62
views
How does changing the concentration of the reactants affect the reaction rate and efficiency in the chemical reaction between sodium thiosulfate and hydrochloric acid?
answered
Feb 3
in
Chemical kinetics
0
votes
19
views
What is the concentration of copper ions present in a sample if the absorbance value is 0.345 and the path length is 1 cm? The molar absorptivity of copper ions is known to be 4.58 x 10^4 L mol^-1 cm^-1 at a wavelength of 600 nm in spectrophotometry.
answered
Jan 30
in
Analytical Chemistry
0
votes
97
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Calculate the enthalpy of solution for the dissolution of 15g of potassium chloride (KCl) in 100g of water (H2O) given that the temperature change was -12.5°C. The enthalpy of fusion for KCl is 17.2 kJ/mol and the specific heat capacity of water is 4.18 J/g•°C.
answered
Jan 23
in
ThermoChemistry
0
votes
41
views
A sample of nitrogen dioxide is placed in a container at 250°C and 1 atm, where it decomposes according to the following equation: 2NO2(g) ↔ 2NO(g) + O2(g)The initial concentration of NO2 is 0.10 M, and the equilibrium constant (Kc) at this temperature is 4.0 x 10^-3. If the volume of the container is suddenly decreased to one-half of its original volume, causing the pressure to double, what will happen to the amount of NO and O2 present at equilibrium? Calculate the new equilibrium concentrations of NO and O2.
answered
Jan 22
in
Chemical equilibrium
0
votes
54
views
Where does the stress-diathesis model place emphasis?
answered
Jan 20
in
Psychology
0
votes
35
views
What is the role of language in cognitive development?
answered
Jan 20
in
Psychology
0
votes
18
views
Who developed the positivist approach to psychology?
answered
Jan 16
in
Psychology
0
votes
87
views
When was the 'Authoritarian Personality Theory' introduced?
answered
Jan 15
in
Psychology
0
votes
107
views
What is the main goal of oral history research in psychology?
answered
Jan 15
in
Psychology
0
votes
55
views
What is discourse analysis?
answered
Jan 14
in
Psychology
0
votes
63
views
What is abnormal psychology?
answered
Jan 14
in
Psychology
0
votes
48
views
What is the DSM-5 criteria for diagnosing PTSD?
answered
Jan 14
in
Psychology
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