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0
votes
33
views
What are the resonance structures for the molecule of nitrate ion (NO3-)? Show how the pi electron density is distributed across the atoms in each resonance structure.
answered
Feb 21
in
Chemical bonding
0
votes
43
views
How does the chemical composition and structure of luminescent materials affect their photochemical properties, and how can this knowledge be applied to optimize the brightness and efficiency of these materials for various applications?
answered
Feb 18
in
PhotoChemistry
0
votes
39
views
How does surface modification of nanoparticles affect their properties and reactivity in various applications?
answered
Feb 17
in
Surface Chemistry
0
votes
69
views
How can the synthesis of polypropylene from propylene monomer be optimized to increase the yield and ensure sustainability?
answered
Feb 11
in
Chemical synthesis
0
votes
43
views
How can first principles calculations be used to predict the electronic and magnetic properties of topological materials and provide insights into their potential applications in spintronics and quantum computing?
answered
Feb 5
in
Quantum Chemistry
0
votes
80
views
Here's a precise problem for the student to solve: Calculate the standard enthalpy change for the neutralization of 50 mL of 0.10 M hydrochloric acid (HCl) with 50 mL of 0.10 M sodium hydroxide (NaOH) at 25°C, given that the specific heat capacity of the solution is 4.18 J/(g °C) and the density of the solution is 1.00 g/mL.
answered
Feb 4
in
Chemical thermodynamics
0
votes
54
views
Design a process for the purification of crude acetone obtained from the industrial production of phenol to obtain at least 99% pure acetone. Take into account the initial impurities in the crude acetone and suggest suitable separation techniques to remove them. Specify the equipment and operating conditions required for your proposed purification process.
answered
Feb 4
in
Chemical engineering
0
votes
71
views
Calculate the standard electrode potential for the redox reaction where Ag(s) is oxidized by Cu2+(aq) to form Ag+(aq) and Cu(s) given that the standard reduction potential for Ag+(aq) + e- → Ag(s) is 0.80 V and for Cu2+(aq) + 2e- → Cu(s) is 0.34 V.
answered
Feb 3
in
Chemical thermodynamics
0
votes
81
views
What strategies can be used to overcome the challenge of insufficient funding for chemistry education in schools, and how can students actively advocate for increased resources for their chemistry programs?
answered
Jan 30
in
Chemical education
0
votes
93
views
What is the concentration of iron in a water sample collected from a local lake using voltammetry with a standard potential of -0.44 V?
answered
Jan 30
in
Analytical Chemistry
0
votes
88
views
Calculate the enthalpy change when 50 ml of 0.2 M sodium chloride solution is mixed with 50 ml of 0.1 M silver nitrate solution. Given the enthalpy of precipitation of silver chloride as -64.8 kJ/mol.
answered
Jan 23
in
ThermoChemistry
0
votes
87
views
Calculate the activation energy of a reaction that has a rate constant of 8.23 x 10^-4 s^-1 at 300 K and a rate constant of 1.56 x 10^-2 s^-1 at 350 K.
answered
Jan 23
in
Chemical kinetics
0
votes
76
views
Who conducted the Rosenhan Experiment?
answered
Jan 20
in
Psychology
0
votes
71
views
Why is the ecological approach criticised for its lack of generalisability?
answered
Jan 20
in
Psychology
0
votes
74
views
How does the drive reduction theory explain motivation?
answered
Jan 20
in
Psychology
0
votes
72
views
According to Julian Rotter's social learning theory, how do individuals perceive control over their own lives?
answered
Jan 17
in
Psychology
0
votes
66
views
What is the role of emotions in parenting?
answered
Jan 17
in
Psychology
0
votes
36
views
How can correlation analysis be used in psychology research?
answered
Jan 17
in
Psychology
0
votes
57
views
What is a predictive validity?
answered
Jan 17
in
Psychology
0
votes
40
views
How does exposure therapy treat anxiety disorders?
answered
Jan 15
in
Psychology
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