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1
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18
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What is the molecular geometry of the molecule CH4? How does it differ from the molecular geometry of NH3? Explain the factors that determine the molecular geometries of these two compounds.
asked
4 days
ago
in
Chemical bonding
0
votes
1
answer
29
views
What is the molecular geometry and bond angles of ammonia (NH3) and how do they relate to its polarity and dipole moment?
asked
4 days
ago
in
Quantum Chemistry
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votes
1
answer
16
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How does the length of conjugated polymer chains affect their electronic and optical properties? Use quantum chemical calculations to compare the electronic and optical properties of a short and long-chain conjugated polymer.
asked
5 days
ago
in
Quantum Chemistry
0
votes
1
answer
14
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How does changing the pH of the reaction mixture affect the rate of the iodine clock reaction between potassium iodate and sodium bisulfite?
asked
5 days
ago
in
Chemical kinetics
0
votes
1
answer
25
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What is the impact of temperature on the surface tension of water and how can it be measured experimentally using a capillary tube and a balance?
asked
5 days
ago
in
Surface Chemistry
0
votes
1
answer
18
views
What is the effect of increasing the concentration of NaCl in a solution on the solubility of a sparingly soluble salt, such as AgCl? Show the calculations and explain the reasoning behind your answer.
asked
5 days
ago
in
Chemical equilibrium
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votes
1
answer
5
views
How can we design a system that produces a specific flavor compound efficiently and economically, while also ensuring the safety of the workers and the environment?
asked
Feb 12
in
Chemical engineering
0
votes
1
answer
40
views
How does the presence of CFCs in the atmosphere lead to depletion of the ozone layer, and what are some potential solutions to prevent further damage?
asked
Feb 12
in
Environmental Chemistry
0
votes
1
answer
31
views
How can the efficiency of solar cells be improved by synthesizing and characterizing new materials with improved light absorption, charge transport, and stability under solar radiation?
asked
Feb 7
in
Materials Chemistry
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votes
1
answer
9
views
How can molecular docking studies be used to design more effective and specific drugs?
asked
Feb 5
in
Computational Chemistry
0
votes
1
answer
42
views
Determine the enthalpy of hydrolysis for sodium acetate (NaC2H3O2) given that the enthalpy of neutralization for acetic acid (HC2H3O2) and sodium hydroxide (NaOH) is -55.9 kJ/mol and the heat of formation for NaC2H3O2 is -382.7 kJ/mol.
asked
Feb 4
in
ThermoChemistry
0
votes
1
answer
45
views
Calculate the standard enthalpy change of the formation of water (H2O) given the following data:- Standard enthalpy of formation of hydrogen gas (H2) = 0 kJ/mol- Standard enthalpy of formation of oxygen gas (O2) = 0 kJ/mol- Standard enthalpy of formation of water vapor (H2O(g)) = -241.8 kJ/mol
asked
Feb 3
in
Chemical thermodynamics
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votes
1
answer
68
views
How does changing the reaction mechanism affect the rate of a chemical reaction, and what are the factors that influence this relationship?
asked
Feb 3
in
Chemical kinetics
0
votes
1
answer
61
views
How do changes in the molecular structure of a conjugated polymer affect its electronic and optical properties, and how can we calculate these changes using quantum chemistry methods?
asked
Jan 31
in
Quantum Chemistry
0
votes
1
answer
60
views
How do changes in pH affect the structure and function of proteins? Provide 3 examples of how a change in pH can impact protein structure and function.
asked
Jan 31
in
BioChemistry
0
votes
1
answer
60
views
How does the presence of acid mine drainage in bodies of water impact the pH level, dissolved oxygen content, and heavy metal concentrations of the water, and what can be done to mitigate these effects?
asked
Jan 30
in
Environmental Chemistry
0
votes
1
answer
81
views
What is the concentration of iron ions in a sample of tap water using spectrophotometry?
asked
Jan 30
in
Analytical Chemistry
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1
answer
37
views
Calculate the effect of adding a buffer solution consisting of equal amounts of acetic acid (pKa = 4.76) and sodium acetate to a 0.1 M solution of acetic acid (Ka = 1.8 x 10^-5) at equilibrium. The volume of the buffer added is equal to the volume of the acetic acid solution.
asked
Jan 23
in
Chemical equilibrium
0
votes
1
answer
24
views
When was the concept of working memory proposed?
asked
Jan 20
in
Psychology
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votes
1
answer
37
views
How do humanistic psychologists view the concept of self-actualisation?
asked
Jan 17
in
Psychology
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