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Answers by HildredU3922
0
votes
23
views
How does the intensity of light affect the rate of a chemical reaction involving the decomposition of hydrogen peroxide?
answered
4 days
ago
in
Chemical kinetics
0
votes
20
views
What is the balanced equation for the single replacement reaction between magnesium (Mg) and hydrochloric acid (HCl), and what are the products of the reaction?
answered
Feb 17
in
Chemical reactions
0
votes
30
views
What are the chemical compounds present in air pollutants that have the greatest impact on human health, and how can we effectively monitor and control their concentrations to reduce the risk of long-term adverse health effects?
answered
Feb 14
in
Environmental Chemistry
0
votes
31
views
How do the photochemical properties of quantum dots vary with changes in their size, shape, and composition?
answered
Feb 14
in
PhotoChemistry
0
votes
32
views
How can we use quantum chemistry methods to predict the catalytic activity and selectivity of a specific reaction?
answered
Feb 14
in
Quantum Chemistry
0
votes
50
views
How can inadequate training for chemistry teachers affect students' learning outcomes and their interest in pursuing further education or careers in chemistry-related fields?
answered
Feb 5
in
Chemical education
0
votes
45
views
Determine the activation energy for the electrochemical reaction between zinc and copper (II) sulfate solution, given that the rate constant is 2.8 x 10^-3 s^-1 at 298 K and 8.7 x 10^-3 s^-1 at 308 K.
answered
Feb 4
in
ElectroChemistry
0
votes
54
views
Calculate the standard electrode potential for the following cell: Mg (s) | Mg2+ (aq, 0.10 M) || Ag+ (aq, 1.0 M) | Ag (s) Given: E°(Ag+/Ag) = +0.80 V E°(Mg2+/Mg) = -2.37 V
answered
Feb 3
in
ElectroChemistry
0
votes
35
views
Calculate the rate of electroplating of copper on a metallic surface at a current of 2.5 amperes for a duration of 3 hours using a copper nitrate solution with a concentration of 0.2 M. Given that the standard potential of the reduction reaction of Cu2+ to Cu is +0.34 V and the charge of one mole of electrons is 96500 C/mol.
answered
Feb 3
in
ElectroChemistry
0
votes
51
views
How can UV-Vis spectroscopy be used to identify the presence of specific functional groups in a compound, such as aldehydes or ketones? What are the characteristic absorbance wavelengths for these functional groups, and how can their presence be confirmed through spectral analysis?
answered
Jan 29
in
Analytical Chemistry
0
votes
52
views
Calculate the enthalpy of adsorption when 2.0 grams of activated charcoal adsorbs 25 mL of methane gas at a constant temperature of 298 K, given that the pressure is 1 atm. Assume ideal gas behavior for methane.
answered
Jan 23
in
ThermoChemistry
0
votes
59
views
A student needs to calculate the enthalpy change for a chemical reaction given the enthalpies of formation of the reactants and products. The specific problem is: Calculate the enthalpy change for the reaction:CH4(g) + 2O2(g) → CO2(g) + 2H2O(l)Given the following enthalpies of formation:ΔHf(CH4) = -74.8 kJ/molΔHf(CO2) = -393.5 kJ/molΔHf(H2O) = -285.8 kJ/mol
answered
Jan 22
in
Chemical reactions
0
votes
51
views
What is splitting and how does it relate to borderline personality disorder?
answered
Jan 20
in
Psychology
0
votes
39
views
What is Pearson's correlation coefficient?
answered
Jan 20
in
Psychology
0
votes
23
views
Why is correlation not always sufficient to establish causation?
answered
Jan 17
in
Psychology
0
votes
88
views
Why might a therapist use rational-emotive behaviour therapy?
answered
Jan 17
in
Psychology
0
votes
60
views
How can we assess the empirical support of psychodynamic theories?
answered
Jan 16
in
Psychology
0
votes
34
views
According to the interpersonal theory, what is the cause of depression?
answered
Jan 15
in
Psychology
0
votes
42
views
What is the relationship between ecology and animal behaviour?
answered
Jan 14
in
Psychology
0
votes
54
views
What is the role of sleep in cognitive functioning?
answered
Jan 14
in
Psychology
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