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1
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18
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How does the molecular weight of a polymer affect its suitability for use in 3D printing, and what methods can be used to control and optimize the molecular weight for this application?
asked
4 days
ago
in
Materials Chemistry
0
votes
1
answer
27
views
What is the Lewis structure of the methane (CH4) molecule, and how many covalent bonds are formed between each carbon and hydrogen atom?
asked
4 days
ago
in
Chemical bonding
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votes
1
answer
15
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How does a change in pH affect the formation of the complex ion Cu(NH3)4^2+ from Cu2+ and NH3? Provide a detailed explanation with chemical equations and calculations.
asked
5 days
ago
in
Chemical equilibrium
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votes
1
answer
15
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What is the balanced chemical equation for the synthesis reaction of magnesium oxide (MgO) when magnesium (Mg) reacts with oxygen gas (O2)?
asked
Feb 17
in
Chemical reactions
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votes
1
answer
22
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How does the addition of dopants affect the electronic and optical properties of graphene and other 2D materials, and how can these changes be accurately calculated using quantum chemistry methods?
asked
Feb 17
in
Quantum Chemistry
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votes
1
answer
25
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What is the effect of surface functional groups (such as -COOH, -NH2, -OH, etc.) on the adhesion strength of a coating to a substrate, and how can this knowledge be used to develop more efficient adhesive and coating materials?
asked
Feb 14
in
Surface Chemistry
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votes
1
answer
9
views
How can we design a new cancer drug that targets cancer cells while minimizing harm to healthy cells?
asked
Feb 12
in
Medicinal Chemistry
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votes
1
answer
39
views
How can the principles of chemical engineering be applied to design a cost-effective and efficient system for the treatment of heavy metal wastewater in an industrial setting?
asked
Feb 10
in
Chemical engineering
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votes
1
answer
34
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How can the photochemical degradation of pollutants in the environment be optimized using titanium dioxide as a photocatalyst?
asked
Feb 10
in
PhotoChemistry
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votes
1
answer
39
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How can first principles calculations be used to predict the electronic and magnetic properties of topological materials and provide insights into their potential applications in spintronics and quantum computing?
asked
Feb 5
in
Quantum Chemistry
0
votes
1
answer
41
views
Calculate the standard enthalpy change for the formation of one mole of methane (CH4) gas given the following information: - Heat of combustion of methane gas is -890.36 kJ/mol - Heat of formation of water (H2O) liquid is -285.83 kJ/mol - Heat of formation of carbon dioxide (CO2) gas is -393.52 kJ/mol
asked
Feb 3
in
Chemical thermodynamics
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1
answer
71
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A student wants to synthesize a polymer using the monomer vinyl chloride. The reaction is exothermic and produces a polymer with an average molecular weight of 50,000 g/mol. The enthalpy change of polymerization for this reaction is -121.8 kJ/mol. How much heat is liberated during the polymerization of 1 mol of vinyl chloride?
asked
Jan 22
in
ThermoChemistry
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votes
1
answer
76
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What is the major product formed when propanal is treated with a catalytic amount of NaOH and CH3CH2I? Provide a stepwise mechanism to support your answer.
asked
Jan 21
in
Organic Chemistry
0
votes
1
answer
69
views
How might biological factors relate to ADHD?
asked
Jan 20
in
Psychology
0
votes
1
answer
30
views
What is the philosophy of mind's evaluation of visual illusions?
asked
Jan 20
in
Psychology
0
votes
1
answer
19
views
Who is more likely to support positive social change?
asked
Jan 20
in
Psychology
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votes
1
answer
34
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According to the demand characteristics theory, what do participants tend to do when they perceive the aims of a study?
asked
Jan 20
in
Psychology
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votes
1
answer
47
views
Why is object permanence an important concept for cognitive development?
asked
Jan 20
in
Psychology
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votes
1
answer
11
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Compare the contributions of Freud and Erik Erikson to developmental psychology.
asked
Jan 17
in
Psychology
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votes
1
answer
12
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Please compare the role of ego boundaries in Erikson's theory versus that of Wilfred Bion's theory of group processes.
asked
Jan 17
in
Psychology
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