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1
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29
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What are the resonance structures of the nitrate ion (NO3-)? Show how the electrons are delocalized among the oxygen atoms in the molecule.
asked
Feb 21
in
Chemical bonding
0
votes
1
answer
34
views
What is the crystal structure of sodium chloride (NaCl) and how does it contribute to its physical properties such as melting point, boiling point, and solubility?
asked
Feb 14
in
Physical Chemistry
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votes
1
answer
35
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How do persistent organic pollutants affect the quality of soil in agricultural areas?
asked
Feb 14
in
Environmental Chemistry
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1
answer
35
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How do hydrogen bonds participate in stabilizing protein-protein interactions and complexes?
asked
Feb 13
in
BioChemistry
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votes
1
answer
30
views
How can we design drugs that target specific types of bacteria without harming beneficial bacteria in the body?
asked
Feb 12
in
Medicinal Chemistry
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1
answer
41
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How can the efficiency of a solar cell be improved by synthesizing and characterizing new materials for use as the absorber layer? Specifically, what properties should the new material possess to achieve optimal energy conversion and what are the best methods for characterizing these properties?
asked
Feb 7
in
Materials Chemistry
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votes
1
answer
41
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How can the depletion of ozone in the atmosphere affect the concentration of harmful UV radiation reaching the Earth's surface, and what can be done to prevent further ozone depletion?
asked
Feb 6
in
Environmental Chemistry
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votes
1
answer
66
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Calculate the standard enthalpy change of the reaction below at 298K.Fe2O3(s) + 3CO(g) → 2Fe(s) + 3CO2(g)Given the following standard enthalpies of formation (ΔHf°):ΔHf°[Fe2O3(s)] = -824.2 kJ/molΔHf°[Fe(s)] = 0 kJ/molΔHf°[CO(g)] = -110.5 kJ/molΔHf°[CO2(g)] = -393.5 kJ/mol. Also, calculate the change in standard entropy of the system (ΔS°) and determine whether the reaction is spontaneous or not.
asked
Feb 3
in
Inorganic Chemistry
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votes
1
answer
81
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Calculate the Heat of Sublimation of iodine (I2) if 20.0 grams of iodine sublimate at standard temperature and pressure (STP) from a solid to a gas phase absorbing 62.30 kJ of heat energy in the process.
asked
Jan 23
in
ThermoChemistry
0
votes
1
answer
100
views
A chemical engineering company has a mixture of ethanol and water with a concentration of 30% ethanol to separate using a distillation column. The company needs to obtain a concentration of 80% ethanol in the distillate at a reflux ratio of 3. Calculate the number of theoretical plates required in the column for the separation, assuming no vapor or liquid bypass, and that the minimum vapor velocity is maintained.
asked
Jan 22
in
Chemical engineering
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1
answer
85
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A 0.50 L vessel contains 1.0 mol of N2(g) and 3.0 mol of H2(g) at equilibrium at 400 K according to the following equation:N2(g) + 3H2(g) ⇌ 2NH3(g)If the volume of the vessel is suddenly decreased to 0.25 L, what will happen to the equilibrium position? Will the concentration of NH3 increase or decrease? Calculate the new equilibrium constant at this new volume.
asked
Jan 22
in
Chemical equilibrium
0
votes
1
answer
49
views
Please evaluate the Zimbardo prison experiment.
asked
Jan 20
in
Psychology
0
votes
1
answer
104
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How did Milgram's obedience study contribute to our understanding of obedience to authority?
asked
Jan 20
in
Psychology
0
votes
1
answer
41
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When looking at cognitive theory, who is the primary figure?
asked
Jan 20
in
Psychology
0
votes
0
answers
55
views
Who developed the cognitive behaviour therapy?
asked
Jan 17
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Psychology
0
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1
answer
45
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How can evolutionary psychology inform public policy?
asked
Jan 16
in
Psychology
0
votes
1
answer
59
views
What is the main limitation of the social cognitive theory?
asked
Jan 15
in
Psychology
0
votes
1
answer
88
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According to the cognitive processing model, how do cognitive biases contribute to the development of eating disorders?
asked
Jan 15
in
Psychology
0
votes
1
answer
85
views
How does the phi phenomenon explain our perception of motion?
asked
Jan 15
in
Psychology
0
votes
1
answer
77
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What is the difference between a group and a crowd?
asked
Jan 14
in
Psychology
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