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0
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31
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How do changes in the size and shape of nanoparticles affect their electronic and optical properties and how can these properties be calculated using quantum chemistry methods?
answered
Feb 24
in
Quantum Chemistry
0
votes
39
views
How does the molecular weight and branching of a polymer affect its suitability for use in 3D printing, and how can these properties be optimized for improved printing quality and mechanical strength of the printed object?
answered
Feb 21
in
Materials Chemistry
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votes
31
views
What is the effect of temperature on the adsorption of gas molecules on a solid surface? Is the adsorption process exothermic or endothermic? Support your answer with experimental data and a suitable equation.
answered
Feb 19
in
Physical Chemistry
0
votes
38
views
How does the change in temperature affect the rate of electron transfer in a redox reaction between iron and copper ions in an aqueous solution, according to the principles of quantum chemistry?
answered
Feb 18
in
Quantum Chemistry
0
votes
66
views
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?
answered
Feb 11
in
Surface Chemistry
0
votes
39
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How can magnetic resonance spectroscopy be used to determine the purity and concentration of a sample of aspirin? Provide a step-by-step explanation of the process and discuss the factors that can affect the accuracy of the results.
answered
Feb 5
in
Physical Chemistry
0
votes
38
views
How can chemistry students in low-resource areas access quality textbooks and resources to enhance their understanding of complex topics?
answered
Feb 5
in
Chemical education
0
votes
84
views
Design a process for the purification of 500 grams of crude aspirin containing impurities such as acetic acid and sulfuric acid. The final product must have a purity of at least 99.5%. Describe the steps involved in the purification process, including the necessary equipment, reagents, and conditions for each step. Also, calculate the percent yield of the final product based on the initial mass of crude aspirin.
answered
Feb 4
in
Chemical engineering
0
votes
69
views
What is the effect of changing the surface functionalization of gold nanoparticles on their stability and reactivity in water, as predicted by molecular dynamics simulations?
answered
Feb 3
in
Computational Chemistry
0
votes
106
views
What is the effect of altering the concentration of reactants and products on the equilibrium constant and reaction rate of a reversible reaction?
answered
Jan 31
in
Chemical kinetics
0
votes
96
views
According to the visual capture effect, what happens when auditory and visual information conflict?
answered
Jan 20
in
Psychology
0
votes
83
views
When did Pearson develop the correlation coefficient?
answered
Jan 20
in
Psychology
0
votes
39
views
According to the diathesis-stress model, how do genetic predispositions and environmental stressors interact in the development of PTSD?
answered
Jan 17
in
Psychology
0
votes
31
views
When evaluating the ecological validity of a theory, what needs to be considered?
answered
Jan 16
in
Psychology
0
votes
57
views
What perspective sees people as inherently good and strives for self-actualisation?
answered
Jan 15
in
Psychology
0
votes
45
views
Why are exotic species also called invasive species?
answered
Jan 8
in
Science
0
votes
126
views
What is the term for a very rapid motor response that is not directed by the brain?
answered
Jan 7
in
Science
0
votes
56
views
What do you call a predator species that affects other species' populations when its own population size changes?
answered
Jan 6
in
Science
0
votes
73
views
What can lenses be used to make?
answered
Jan 6
in
Science
0
votes
98
views
What broad group of animals - which includes rats, dogs and camels - have highly developed brains and often perform work for humans?
answered
Jan 6
in
Science
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