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Answers by Tyler10U150
0
votes
29
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What is the optimum reaction condition for the synthesis of polystyrene from styrene monomer, in terms of temperature and initiator concentration, to achieve the highest yield and highest molecular weight?
answered
Feb 22
in
Chemical synthesis
0
votes
30
views
What is the most effective metal catalyst and reaction conditions for selective oxidation of methane to methanol on metal surfaces?
answered
Feb 21
in
Surface Chemistry
0
votes
28
views
What is the type of inorganic compound formed between Calcium and Chlorine, and how can you identify it as ionic, covalent or metallic?
answered
Feb 20
in
Inorganic Chemistry
0
votes
31
views
What is the coordination environment and electronic structure of the iron atom in the heme group of hemoglobin? How does this structure allow hemoglobin to bind oxygen and transport it throughout the body?
answered
Feb 19
in
Coordination Chemistry
0
votes
34
views
How does the composition of the spilled oil affect its degradation rate in the environment, and what are the most effective methods for remediation of oil spills according to their chemical properties?
answered
Feb 18
in
Environmental Chemistry
0
votes
36
views
How does the choice of polymer affect the mechanical properties of 3D printed objects and how can this be optimized for specific applications?
answered
Feb 18
in
Materials Chemistry
0
votes
23
views
What is the bond angle in the water molecule and how is it predicted using the VSEPR theory and the electron pair geometry of the molecule?
answered
Feb 18
in
Chemical bonding
0
votes
37
views
What is the balance chemical equation for the combustion reaction of propane gas (C3H8) with oxygen to form carbon dioxide and water?
answered
Feb 17
in
Chemical reactions
0
votes
34
views
What is the mechanism behind the enhancement of Raman signals observed in SERS, and how can it be optimized for detection of trace amounts of analytes in a sample?
answered
Feb 17
in
Surface Chemistry
0
votes
55
views
What are the chemical mechanisms behind the process of eutrophication and how do they lead to harmful algal blooms and oxygen depletion in aquatic ecosystems?
answered
Feb 13
in
Environmental Chemistry
0
votes
35
views
How can chemistry students overcome limited access to laboratory equipment and facilities and still effectively learn and apply experimental techniques in the field?
answered
Feb 5
in
Chemical education
0
votes
44
views
How can chemistry students gain practical experience and develop their skills in a field with limited availability of chemistry-related internships and job opportunities?
answered
Feb 5
in
Chemical education
0
votes
70
views
Consider a solution of gas X in contact with a solid surface at a constant temperature. The Langmuir adsorption isotherm for this system is represented by the equation /= _/(1+), where is the partial pressure of gas X, is the volume of the gas, _ is the saturation pressure of the gas, and is the Langmuir adsorption constant. Suppose a student conducts an experiment to investigate the Langmuir adsorption isotherm for gas X on a particular solid surface. They measure the partial pressure of the gas at various volumes and obtain the following results: (mL/g) : 2.0 2.5 3.0 3.5 4.0 (atm) : 0.2 0.4 0.6 0.8 1.0 Using these values, what is the Langmuir adsorption constant, , for the given system?
answered
Feb 3
in
Surface Chemistry
0
votes
44
views
Calculate the standard reaction entropy of the reaction: 2Fe(s) + 3/2O2(g) --> Fe2O3(s) given that the standard enthalpy of the reaction is -824.2 kJ/mol at 298K.
answered
Feb 3
in
Inorganic Chemistry
0
votes
72
views
Calculate the standard Gibbs free energy change, ΔG°, for the electrochemical reaction of 2 moles of aluminum (Al) being oxidized to form 3 moles of aluminum oxide (Al2O3) in a standard state. Given that E°cell for the reaction is 1.66 V and the standard potential for the reduction of Al3+ ions to Al is -1.66 V.
answered
Feb 3
in
ElectroChemistry
0
votes
99
views
How does the drug aspirin work at the molecular level to relieve pain and reduce inflammation in the body?
answered
Jan 31
in
Medicinal Chemistry
0
votes
95
views
How can a chemical engineer develop a process for purifying a chemical contaminated with organic impurities using distillation method?
answered
Jan 30
in
Chemical engineering
0
votes
94
views
How can X-ray diffraction be used to determine the exact composition and crystal structure of an unknown inorganic sample and what are the main factors that affect the accuracy of the analysis?
answered
Jan 30
in
Analytical Chemistry
0
votes
85
views
Calculate the enthalpy change for the precipitation reaction of barium chloride and sodium sulfate, given that the initial concentrations of the two solutions are 0.2 M and are mixed in a coffee cup calorimeter. The final temperature observed is 25°C and the heat capacity of the coffee cup is 10 J/°C.
answered
Jan 23
in
ThermoChemistry
0
votes
70
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A droplet of water weighing 0.2 grams is placed on the surface of a perfectly clean glass plate. The diameter of the droplet is measured to be 5 mm. Calculate the surface tension of water in dynes/cm.
answered
Jan 22
in
Surface Chemistry
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