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What is the step-by-step reaction mechanism for the preparation of 2-chloro-4-nitroaniline from aniline and chlorine gas, and what are the optimal conditions required to yield a high conversion rate?
asked
Feb 22
in
Chemical synthesis
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votes
1
answer
23
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What is the mechanism of the nucleophilic substitution reaction between bromomethane and ammonia?
asked
Feb 21
in
Organic Chemistry
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1
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49
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How does the coordination chemistry of lanthanides and actinides differ from that of transition metals, and what are the implications of these differences on their chemical and physical properties?
asked
Feb 19
in
Coordination Chemistry
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1
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39
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How does the absorption of light by a molecule lead to electronic excitations and what are the subsequent photophysical and photochemical processes that occur in the excited state?
asked
Feb 17
in
Quantum Chemistry
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1
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24
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What is the difference between primary, secondary, and tertiary amines in terms of their synthesis and properties? Provide examples of each and explain their reactivity with electrophiles.
asked
Feb 14
in
Organic Chemistry
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1
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40
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How can inadequate training for chemistry teachers affect the quality of education in student learning and performance in chemistry?
asked
Feb 6
in
Chemical education
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1
answer
41
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How can chemistry students be better educated on the importance and implementation of safety protocols in the laboratory to prevent accidents and injuries?
asked
Feb 4
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Chemical education
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1
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50
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Calculate the surface tension of a liquid whose weight is 0.1 N and the length of a wire that floats on the surface of the liquid is 20 cm. The density of the liquid is 1.2 g/cm³.
asked
Feb 3
in
Surface Chemistry
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1
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73
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How can the concentration of a specific substance in a sample be determined using colorimetry? Provide a detailed stepwise procedure for the same and explain the underlying principle behind it.
asked
Jan 29
in
Analytical Chemistry
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70
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Calculate the lattice energy of MgO using Born-Haber Cycle. Given the following information: - The enthalpy change of sublimation of Mg = +1472 kJ/mol- The first ionization energy of Mg = +738 kJ/mol- The second ionization energy of Mg = +1450 kJ/mol- The enthalpy change of electron affinity of O = -141 kJ/mol- The enthalpy change of formation of MgO = -601 kJ/mol- Assume that all other enthalpy changes are negligible.
asked
Jan 23
in
Inorganic Chemistry
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1
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88
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Calculate the bond length between two hydrogen atoms (H-H) that are bonded together by a single covalent bond, knowing that the bond energy is 436 kJ/mol and the force constant is 432 N/m.
asked
Jan 23
in
Chemical bonding
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1
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82
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A chemistry student wants to know how the concentration of reactants and products affects the equilibrium constant of a chemical reaction. They decide to investigate the reaction between nitrogen gas and oxygen gas to form nitrogen dioxide gas, and the equilibrium constant Kc for this reaction. What is the relationship between the concentration of reactants and products and the equilibrium constant for this reaction, and how can this be explained by Le Chatelier's principle?
asked
Jan 22
in
Physical Chemistry
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1
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19
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Where is the emphasis in existential therapy?
asked
Jan 20
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Psychology
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1
answer
90
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When should debriefing occur in a research study?
asked
Jan 17
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Psychology
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1
answer
73
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How could temperament affect parent-child interactions?
asked
Jan 17
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Psychology
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1
answer
61
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What is the difference between OCD and OCPD?
asked
Jan 14
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Psychology
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1
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83
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How does cognitive behavioural therapy (CBT) help individuals cope with grief and loss?
asked
Jan 14
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Psychology
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1
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76
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Which genetic disorder results in the inability of melanocytes to produce melanin?
asked
Jan 8
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Science
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1
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50
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What type of fertilization do most reptiles have?
asked
Jan 8
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Science
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1
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48
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What is a sac filled with fluid or other material?
asked
Jan 6
in
Science
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