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0
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19
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How does the size and shape of nanomaterials affect its catalytic activity in chemical reactions?
answered
23 hours
ago
in
Materials Chemistry
0
votes
26
views
What is the effect of increasing the concentration of the reaction product on the rate of reaction, using the reaction between hydrogen peroxide and potassium iodide as an example?
answered
3 days
ago
in
Chemical kinetics
0
votes
20
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How do the properties of the dispersed phase and continuous phase of a colloid affect its stability and coagulation, and what mechanisms can be used to control these processes?
answered
3 days
ago
in
Surface Chemistry
0
votes
18
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How does the increasing atmospheric concentration of carbon dioxide affect the absorption and emission of infrared radiation, contributing to the enhanced greenhouse effect and global warming?
answered
5 days
ago
in
Environmental Chemistry
0
votes
19
views
What is the effect of temperature on the fluidity of cell membranes?
answered
5 days
ago
in
BioChemistry
0
votes
28
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What is the effect of temperature on the reaction rate and safety of the exothermic reaction between sodium hydroxide and hydrochloric acid?
answered
5 days
ago
in
Chemical kinetics
0
votes
28
views
What is the effect of activated carbon particle size on the adsorption of toxic gas pollutants from air?
answered
5 days
ago
in
Surface Chemistry
0
votes
23
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How does the cooling rate affect the crystalline morphology of polyethylene?
answered
6 days
ago
in
Polymer Chemistry
0
votes
25
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How does the addition of a chiral molecule affect the properties and behavior of liquid crystals?
answered
Feb 17
in
Physical Chemistry
0
votes
33
views
What is the molecular geometry and polarity of the nitrogen trifluoride (NF3) molecule?
answered
Feb 14
in
Inorganic Chemistry
0
votes
30
views
What is the effect of increasing pressure on the reaction rate of the gas phase reaction between hydrogen gas and iodine gas to form hydrogen iodide, and how can this effect be explained using collision theory and the ideal gas law?
answered
Feb 13
in
Chemical kinetics
0
votes
44
views
How does the coordination chemistry of metalloenzymes and metalloproteins contribute to their catalytic activity? Provide an example of a metalloenzyme or metalloprotein and explain the role of the metal ion in its catalytic mechanism.
answered
Feb 12
in
Coordination Chemistry
0
votes
35
views
How can new materials be synthesized and characterized for the removal of specific contaminants, such as heavy metals, from water sources? What type of characterization techniques can be used to determine the effectiveness and efficiency of these materials for water purification?
answered
Feb 5
in
Materials Chemistry
0
votes
59
views
Calculate the standard enthalpy change for the reaction: 2 NaOH(aq) + H2SO4(aq) → Na2SO4(aq) + 2 H2O(l)Given the following data:ΔHf°(NaOH) = -469.14 kJ/molΔHf°(H2SO4) = -814.00 kJ/molΔHf°(Na2SO4) = -1388.40 kJ/molΔHf°(H2O(l)) = -285.83 kJ/mol
answered
Feb 3
in
Chemical thermodynamics
0
votes
52
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Calculate the standard enthalpy change (in kJ/mol) for the following chemical reaction at 298 K:2SO2(g) + O2(g) → 2SO3(g)Given the standard enthalpies of formation (∆Hf°) at 298 K for SO2(g), O2(g), and SO3(g) are -296.8 kJ/mol, 0 kJ/mol, and -396.0 kJ/mol, respectively.
answered
Feb 3
in
Physical Chemistry
0
votes
51
views
How has the Clean Air Act affected air quality in the United States over the past decade?
answered
Jan 31
in
Environmental Chemistry
0
votes
69
views
What is the concentration of lead (Pb) ions in a given water sample using voltammetry with a reference electrode?
answered
Jan 30
in
Analytical Chemistry
0
votes
50
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Calculate the bond dissociation energy (in kJ/mol) for the O-H bond in water (H2O) given that the enthalpy change for the reaction H2O (g) → H (g) + OH(g) is +495 kJ/mol and the enthalpy change for the reaction H2(g) + 1/2O2(g) → H2O(g) is -241.8 kJ/mol.
answered
Jan 23
in
ThermoChemistry
0
votes
55
views
A student wants to determine the rate constant of a first-order reaction. The initial concentration of reactant is 0.050 M and after 60 seconds, the concentration drops to 0.025 M. What is the rate constant of the reaction?
answered
Jan 22
in
Chemical kinetics
0
votes
28
views
According to Sternberg's triarchic theory of intelligence, what are the three components of intelligence?
answered
Jan 20
in
Psychology
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