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What is the optimal stoichiometric ratio of adipic acid and hexamethylenediamine for the synthesis of nylon-6,6 and how does varying this ratio affect the yield and properties of the final product?
asked
Feb 21
in
Chemical synthesis
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votes
1
answer
28
views
What is the effect of molecular structure and environment on electron transport in nanoscale systems? Analyze the transport properties of a specific molecular system using quantum mechanical methods and computational simulations.
asked
Feb 19
in
Quantum Chemistry
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1
answer
39
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How does surface modification of biomaterials affect protein adsorption?
asked
Feb 17
in
Surface Chemistry
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1
answer
79
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How does individual variation in genetic makeup affect the way drugs are metabolized in the body, and how can this information be used to optimize drug therapies for patients with different genetic backgrounds?
asked
Feb 13
in
Medicinal Chemistry
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votes
1
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67
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How can the surface chemistry of adhesives and coatings be manipulated to achieve strong and durable bonding on different types of substrates, such as metals, plastics, and composites?
asked
Feb 11
in
Surface Chemistry
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votes
1
answer
41
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How can one predict the bond strength of a molecule based on its chemical bonding? Provide specific examples and compare the bond strengths of various molecules to illustrate the concept.
asked
Feb 5
in
Chemical bonding
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1
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5.9k
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Consider the metalloprotein hemoglobin, which has four heme groups each coordinated to a single iron ion. Suppose that ferrous iron in the heme group of hemoglobin is oxidized to ferric state by reacting with hydrogen peroxide. Calculate the number of hydrogen peroxide molecules needed to oxidize all the iron ions of hemoglobin in a human body that has a total of 5 liters of blood, assuming the concentration of hemoglobin in blood is 15 grams per liter.
asked
Feb 3
in
Coordination Chemistry
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votes
1
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107
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How does the DNA repair pathway known as base excision repair (BER) work on a molecular level and what are the key enzymes involved in this process?
asked
Jan 31
in
BioChemistry
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1
answer
119
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How do amphipathic molecules contribute to the surface properties of biomembranes?
asked
Jan 31
in
Surface Chemistry
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1
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136
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How much sodium chloride (NaCl) can be obtained from a sample of 5 grams of sea salt, given that the percentage of NaCl in the sample is 85% and gravimetric analysis is being used for the quantification?
asked
Jan 30
in
Analytical Chemistry
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1
answer
78
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Calculate the lattice energy of magnesium oxide (MgO) given the following data: Ionization energy of magnesium (Mg): 738 kJ/mol Electron affinity of oxygen (O): -141 kJ/mol Lattice energy of MgO at standard conditions: -3795 kJ/mol Bond length between Mg and O: 203 pm
asked
Jan 23
in
Inorganic Chemistry
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1
answer
76
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Calculate the heat of hydration of copper (II) sulfate pentahydrate given that 5.00 g of the hydrate was dissolved in 100.0 mL of water at 25°C, and the resulting solution temperature increased from 25°C to 30°C. The molar mass of copper (II) sulfate pentahydrate is 249.685 g/mol and the specific heat capacity of water is 4.184 J/g°C.
asked
Jan 23
in
ThermoChemistry
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votes
1
answer
39
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Please evaluate the Stanford prison experiment.
asked
Jan 20
in
Psychology
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votes
1
answer
103
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According to the parallel-distributed processing model, what is the role of bottom-up processing?
asked
Jan 17
in
Psychology
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1
answer
16
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Who was Aaron Beck and how did he contribute to CBT theory?
asked
Jan 17
in
Psychology
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votes
1
answer
40
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What is the Criticism of PCT?
asked
Jan 16
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Psychology
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1
answer
60
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According to the cognitive behavioural approach, how might changing behaviour lead to changes in thinking?
asked
Jan 16
in
Psychology
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1
answer
54
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What is the role of social support in the stress and coping theory?
asked
Jan 16
in
Psychology
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1
answer
69
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What is the main premise of attachment theory?
asked
Jan 16
in
Psychology
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1
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105
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What is confirmation bias, and how does it relate to pop-psychology?
asked
Jan 15
in
Psychology
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