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0
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31
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How does the presence of different functional groups on cations and anions affect the viscosity of ionic liquids at different temperatures?
answered
Feb 22
in
Physical Chemistry
0
votes
30
views
What is the most efficient method for synthesizing polystyrene from styrene monomer at a large scale while minimizing waste and maximizing yield?
answered
Feb 21
in
Chemical synthesis
0
votes
30
views
What is the molecular geometry and bond angles of the molecule CH4 (methane) using quantum chemistry calculations?
answered
Feb 21
in
Quantum Chemistry
0
votes
43
views
How can we optimize the process parameters (such as temperature, pressure, and reaction time) for the production of environmentally-friendly detergents with high cleaning performance?
answered
Feb 14
in
Chemical engineering
0
votes
56
views
How does increasing pressure affect the rate of a chemical reaction, specifically the reaction between hydrogen gas and iodine gas to form hydrogen iodide?
answered
Feb 13
in
Chemical kinetics
0
votes
75
views
How can the synthesis and characterization of new materials be optimized for use in gas sensors to detect volatile organic compounds (VOCs) in industrial and household environments?
answered
Feb 11
in
Materials Chemistry
0
votes
36
views
How can the optical properties of glasses be optimized for specific applications, such as lenses for eyeglasses or camera lenses, and what parameters need to be considered in the design process?
answered
Feb 10
in
Materials Chemistry
0
votes
38
views
How can the mechanical properties of 3D printed polymer materials be improved for industrial applications?
answered
Feb 10
in
Polymer Chemistry
0
votes
30
views
How can chemistry students who have limited access to extracurricular activities related to chemistry supplement their education to enhance their understanding of the subject?
answered
Feb 5
in
Chemical education
0
votes
81
views
Find the standard enthalpy change for the reaction: 2C2H5OH(l) + 9O2(g) --> 6CO2(g) + 8H2O(l) given the following information: Standard enthalpy of formation (ΔHfº) of C2H5OH(l) = -277 kJ/mol Standard enthalpy of formation (ΔHfº) of CO2(g) = -393.5 kJ/mol Standard enthalpy of formation (ΔHfº) of H2O(l) = -285.8 kJ/mol Assume that the reaction occurs at standard conditions.
answered
Feb 4
in
Chemical thermodynamics
0
votes
82
views
Determine the enthalpy change of precipitation for the reaction between 50ml of 0.1M sodium sulfate and 50ml of 0.1M barium nitrate, given that the final temperature is 25°C and the initial temperature was 30°C. The specific heat capacity of the solution is 4.18 J/g °C and the density is 1 g/mL. (Assume the reaction goes to completion and all volumes are additive.)
answered
Feb 4
in
ThermoChemistry
0
votes
61
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Calculate the standard enthalpy change for the reaction between [Co(en)2Cl2]Cl and NaNO2 to form [Co(en)2(NO2)2]Cl and NaCl, given the following information: [Co(en)2Cl2]Cl and [Co(en)2(NO2)2]Cl have a ΔHf° of -288 kJ/mol and -136 kJ/mol, respectively. The ΔHf° of NaNO2 and NaCl are -463.2 kJ/mol and -411.2 kJ/mol, respectively. Assume that the reaction is conducted at a constant pressure and temperature of 298 K.
answered
Feb 3
in
Chemical thermodynamics
0
votes
104
views
What is the electronic configuration and molecular orbital diagram for the carbon monoxide (CO) molecule?
answered
Jan 31
in
Quantum Chemistry
0
votes
78
views
Calculate the equilibrium constant, Ka, for the dissociation of a weak acid HA with an initial concentration of 0.10 M that ionizes to form H+ and A-. At equilibrium, the concentration of H+ is found to be 1.0 x 10^-5 M and the concentration of A- is 0.09 M.
answered
Jan 23
in
Chemical equilibrium
0
votes
120
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A student needs to prepare a buffer solution with a pH of 4.5 using acetic acid (pKa = 4.76) and its conjugate base sodium acetate. The student has 100 mL of 0.1 M acetic acid and has access to sodium acetate. What mass of sodium acetate (in grams) should the student add to the solution to achieve the desired pH?
answered
Jan 22
in
Chemical reactions
0
votes
125
views
What is the cognitive neuroscience approach's evaluation of visual illusions?
answered
Jan 20
in
Psychology
0
votes
35
views
Where can t-tests be used in psychology research?
answered
Jan 20
in
Psychology
0
votes
42
views
When was the Hamilton Rating Scale for Depression HAM-D first published?
answered
Jan 20
in
Psychology
0
votes
64
views
Why is internal consistency an important criterion for evaluating neuroscience theories?
answered
Jan 20
in
Psychology
0
votes
36
views
Please compare correlational and experimental research designs.
answered
Jan 17
in
Psychology
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