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Answers by Dannie89E20
0
votes
22
views
How does the size and composition of microplastics affect their toxicity to marine organisms in aquatic environments?
answered
1 day
ago
in
Environmental Chemistry
0
votes
22
views
What is the most efficient method to prepare a high yield of acetylsalicylic acid from a given amount of salicylic acid and acetic anhydride with minimal impurities?
answered
4 days
ago
in
Chemical synthesis
0
votes
28
views
What is the electronegativity difference between a potassium atom (electronegativity value of 0.82) and a chlorine atom (electronegativity value of 3.16)?
answered
6 days
ago
in
Chemical bonding
0
votes
35
views
How does the acidity level of acid mine drainage affect the solubility and toxicity of heavy metals present in contaminated water sources, and what are the best treatment methods to mitigate their impact on the environment?
answered
Feb 17
in
Environmental Chemistry
0
votes
28
views
What is the bond energy required to break a C-C bond and a C-H bond in methane gas (CH4)?
answered
Feb 13
in
Chemical reactions
0
votes
48
views
How do industrial projects impact air quality in the surrounding environment and what environmental chemistry principles can be applied to assess and mitigate their potential negative effects?
answered
Feb 13
in
Environmental Chemistry
0
votes
38
views
What are the chemical properties of common oil spills and how do these properties affect the environment and its ecosystems?
answered
Feb 12
in
Environmental Chemistry
0
votes
44
views
How can the synthesis of polyethylene terephthalate from terephthalic acid and ethylene glycol be optimized for maximum yield and purity?
answered
Feb 11
in
Chemical synthesis
0
votes
10
views
How can the production of lubricants be optimized through the selection of raw materials, equipment design, and process parameters in the system design of a lubricant production plant?
answered
Feb 10
in
Chemical engineering
0
votes
31
views
How can the chemical structure of existing cardiovascular drugs be modified to improve their efficacy and reduce their side effects?
answered
Feb 6
in
Medicinal Chemistry
0
votes
69
views
What is the binding energy of a non-covalent interaction between a water molecule and a methane molecule, calculated through quantum chemical calculations?
answered
Jan 31
in
Computational Chemistry
0
votes
80
views
How does a change in pH affect the formation of the complex ion Fe(III)-thiocyanate, and what is the equilibrium constant for this reaction at a pH of 2.5?
answered
Jan 30
in
Chemical equilibrium
0
votes
78
views
What is the concentration of iron (II) ions in a water sample with absorbance of 0.295 at a wavelength of 510 nm, given that the molar extinction coefficient of iron (II) ions is 11,300 M^-1cm^-1 at this wavelength? Use colorimetry to determine the solution.
answered
Jan 30
in
Analytical Chemistry
0
votes
8
views
How can the concentration of lead in a water sample be determined using atomic absorption spectroscopy? What factors need to be considered when preparing the sample and setting up the instrument for analysis? How can the results be compared to regulatory limits for lead in drinking water to determine whether the sample is safe for consumption?
answered
Jan 29
in
Analytical Chemistry
0
votes
73
views
What is the pKa value for the conjugate acid of the following organic compound: 4-nitrophenol (C6H5NO3)?
answered
Jan 21
in
Organic Chemistry
0
votes
36
views
Why was the term 'crazy' challenged by mental health advocates?
answered
Jan 20
in
Psychology
0
votes
73
views
According to Path-Goal Theory, how does a leader provide direction for followers?
answered
Jan 20
in
Psychology
0
votes
13
views
According to the social identity theory, why do individuals discriminate against out-group members?
answered
Jan 17
in
Psychology
0
votes
28
views
According to Maslow's hierarchy of needs, when is a person motivated to fulfill their physiological needs?
answered
Jan 17
in
Psychology
0
votes
11
views
Please list some of the common biases that researchers may have in cross-cultural research.
answered
Jan 16
in
Psychology
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