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1
answer
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How does the presence of surfactants in detergents affect the surface tension of water and its ability to remove dirt and stains from clothes?
asked
3 days
ago
in
Surface Chemistry
0
votes
1
answer
32
views
How does the electronic transport property (conductivity) of a graphene nanoribbon change as the width of the ribbon is varied, as predicted by density functional theory (DFT) calculations?
asked
5 days
ago
in
Computational Chemistry
0
votes
1
answer
22
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What is the change in enthalpy (ΔH) for the combustion of methane (CH4) at standard conditions?
asked
6 days
ago
in
Physical Chemistry
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votes
1
answer
28
views
How does the chemical structure of phosphorescent materials affect their photochemical properties such as lifetime, quantum yield, and emission spectrum?
asked
6 days
ago
in
PhotoChemistry
0
votes
1
answer
31
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How does the chemical composition of polymer filaments affect the properties and quality of 3D-printed objects, and what methods can be used to optimize the properties of the final printed product?
asked
Feb 18
in
Materials Chemistry
0
votes
1
answer
24
views
What is the bond strength of a carbon-carbon bond in ethane?
asked
Feb 18
in
Chemical bonding
0
votes
1
answer
33
views
What factors contribute to the bond strength of a molecule and how can you predict the bond strength of a given molecule? Provide examples of molecules with strong and weak bonds and explain how their structures affect their bond strength.
asked
Feb 14
in
Chemical bonding
0
votes
1
answer
42
views
How does the ligand geometry affect the electronic and magnetic properties of metallofullerenes and metalloclusters in coordination chemistry?
asked
Feb 13
in
Coordination Chemistry
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votes
1
answer
38
views
What is the effect of changing the concentration of the reactants on the rate of reaction in a first-order reaction? Provide experimental evidence to support your answer.
asked
Feb 13
in
Chemical kinetics
0
votes
1
answer
9
views
How can we design a small molecule drug that selectively targets and inhibits the activity of the autoimmune cell signaling pathway while avoiding unwanted side effects on healthy cells and tissues?
asked
Feb 12
in
Medicinal Chemistry
0
votes
1
answer
26
views
How can the ion conductivity of solid polymer electrolytes be enhanced to improve battery performance?
asked
Feb 7
in
Polymer Chemistry
0
votes
1
answer
34
views
How can chemistry teachers spark interest in the subject among students who perceive it as difficult and uninteresting?
asked
Feb 6
in
Chemical education
0
votes
1
answer
57
views
Calculate the heat capacity of a 25.0 g sample of copper, given that it was heated from 25°C to 50°C when it absorbed 209 J of heat. The specific heat capacity of copper is 0.385 J/g°C.
asked
Jan 23
in
Chemical thermodynamics
0
votes
1
answer
69
views
Calculate the enthalpy change for the combustion of methane gas (CH4) if 37.0 g of CH4 is completely burned in a bomb calorimeter and the temperature increases by 285.4 K. Assume that the calorimeter has a heat capacity of 4.40 kJ/K and that the combustion reaction is as follows: CH4(g) + 2O2(g) -> CO2(g) + 2H2O(l); ΔH=-890.4 kJ/mol. What is the enthalpy change for the combustion of one mole of methane gas?
asked
Jan 23
in
Chemical reactions
0
votes
1
answer
58
views
Calculate the bond enthalpy for the carbon-oxygen bond in carbon dioxide (CO2) using the following data:- Bond enthalpy of carbon-oxygen double bond = 799 kJ/mol- Bond enthalpy of carbon-oxygen single bond = 358 kJ/molShow all calculations and units.
asked
Jan 23
in
Chemical bonding
0
votes
1
answer
32
views
Why is the exosystem important in ecological systems theory?
asked
Jan 20
in
Psychology
0
votes
1
answer
33
views
Who is known for the social-learning theory?
asked
Jan 17
in
Psychology
0
votes
1
answer
77
views
What is a potential solution for reducing conflict based on the relative deprivation theory?
asked
Jan 17
in
Psychology
0
votes
1
answer
44
views
Please evaluate the Tend and Befriend theory.
asked
Jan 16
in
Psychology
0
votes
1
answer
49
views
Where are polarised opinions from the scientific community typical?
asked
Jan 16
in
Psychology
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