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What is the most efficient catalyst to use in the synthesis of polyethylene terephthalate from terephthalic acid and ethylene glycol, and how does varying the amount of catalyst affect the yield and quality of the final product?
answered
Feb 21
in
Chemical synthesis
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34
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What is the most effective synthesis method for producing a high-performance catalyst material for use in fuel cells, and how can its properties be characterized and optimized to improve fuel cell efficiency and durability?
answered
Feb 21
in
Materials Chemistry
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33
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What is the electronic configuration of the carbon monoxide (CO) molecule? Using quantum mechanics principles, calculate the bond order and predict the bond length of the CO molecule.
answered
Feb 20
in
Physical Chemistry
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39
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What are the key photochemical properties of silver halide crystals used in traditional black and white photography and how do these properties contribute to the formation of an image on photographic film?
answered
Feb 14
in
PhotoChemistry
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votes
91
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How can we design drugs to selectively target specific metabolic pathways in the body, such as those involved in glucose regulation, and minimize off-target effects that could potentially harm the patient?
answered
Feb 12
in
Medicinal Chemistry
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32
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How can we design a drug to treat a genetic disorder caused by abnormal protein folding?
answered
Feb 12
in
Medicinal Chemistry
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votes
33
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How can the synthesis of metal nanoparticles be optimized for size and shape in order to improve their catalytic activity and stability?
answered
Feb 11
in
Materials Chemistry
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votes
75
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How can the structure and properties of coordination polymers and metal-organic frameworks be manipulated for specific applications such as gas storage, catalysis, or drug delivery?
answered
Feb 11
in
Coordination Chemistry
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votes
75
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Calculate the melting point of a solution containing 20 g of benzoic acid (C6H5COOH) and 80 g of naphthalene (C10H8). The melting points of pure benzoic acid and naphthalene are 122.4 °C and 80.2 °C, respectively. The molal freezing point depression constant for naphthalene is 6.8°C/m.
answered
Jan 23
in
Physical Chemistry
0
votes
75
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An unknown compound is synthesized in the lab and needs to be identified using mass spectrometry. Design a step-by-step plan to analyze the compound, including sample preparation, instrument settings, interpretation of data, and identification of possible functional groups.
answered
Jan 22
in
Analytical Chemistry
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90
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A chemistry student wants to determine the percent composition of calcium oxide in a given sample of limestone. The student does an experiment and obtains the mass of the limestone sample, the mass of carbon dioxide evolved upon heating the limestone, and the mass of calcium oxide left behind. Using mass balance calculations, determine the percent composition of calcium oxide in the limestone sample.
answered
Jan 22
in
Analytical Chemistry
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95
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A 0.1 M solution of ammonia (NH3) has a pH of 11.64 at room temperature. If sodium hydroxide (NaOH) is added to this solution such that the concentration of OH- ions becomes 0.01 M, what will be the new pH of the solution? (Assume that the dissociation of water can be ignored)
answered
Jan 22
in
Chemical equilibrium
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78
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Assuming a constant temperature and pressure, what is the solubility of calcium sulfate (CaSO4) in water, given that the concentration of Ca2+ ion in a saturated solution is 4.7 x 10^-5 mol/L? Provide your answer in grams per liter.
answered
Jan 21
in
Inorganic Chemistry
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votes
101
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Identify the oxidizing and reducing agents in the following reaction: Cu(s) + 4HNO3(aq) → Cu(NO3)2(aq) + 2NO2(g) + 2H2O(l)
answered
Jan 21
in
Organic Chemistry
0
votes
85
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How does the social learning theory explain the role of group dynamics in radicalisation and terrorism?
answered
Jan 20
in
Psychology
0
votes
93
views
Why is trauma-informed care important in mental health treatment?
answered
Jan 20
in
Psychology
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votes
42
views
What is the impact of attention on behaviour disorders?
answered
Jan 17
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Psychology
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votes
51
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How does the attachment theory explain the role of attachment figures in coping with trauma?
answered
Jan 17
in
Psychology
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votes
97
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What is a criticism of positive psychology?
answered
Jan 16
in
Psychology
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46
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What is Bandura's theory of observational learning?
answered
Jan 15
in
Psychology
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