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Answers by RaulGalway75
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How does the presence of a catalyst affect the rate of reaction between hydrogen peroxide and potassium iodide, and how can we use kinetic data to compare the reaction rates in the presence and absence of a catalyst?
answered
Feb 22
in
Chemical kinetics
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votes
32
views
What is the molecular geometry and bond angles of ammonia (NH3) molecule?
answered
Feb 21
in
Quantum Chemistry
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votes
32
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How do the photochemical properties of different types of photovoltaic materials affect the efficiency of solar cells?
answered
Feb 20
in
PhotoChemistry
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votes
31
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How does the concentration of protein in a solution affect its adsorption on a solid surface, and how can this information be used to optimize the binding capacity of protein-based biosensors?
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Feb 19
in
Surface Chemistry
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votes
31
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What is the balanced chemical equation for the double replacement reaction that occurs between lead(II) nitrate and potassium iodide?
answered
Feb 17
in
Chemical reactions
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votes
31
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How does the addition of nanoparticles affect the thermal stability of polymeric materials in polymer nanocomposites?
answered
Feb 17
in
Polymer Chemistry
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35
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Identify the type of bonding present in solid sodium chloride and explain how it differs from covalent and metallic bonding.
answered
Feb 14
in
Chemical bonding
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votes
33
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What factors affect the adhesion and cohesion of coatings on various surfaces? Develop an experimental procedure to measure and compare these properties for different coatings and substrates.
answered
Feb 14
in
Surface Chemistry
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votes
33
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What is the chemical structure of pyrrole and what are its properties that make it a key building block for many natural products and pharmaceutical drugs? Provide a specific example of a compound derived from pyrrole and explain its medicinal properties.
answered
Feb 14
in
Organic Chemistry
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41
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What is the structural difference between ethanol and propanol as determined by nuclear magnetic resonance (NMR) spectroscopy?
answered
Feb 14
in
Physical Chemistry
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votes
38
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What are the potential harmful effects of chemical pollutants on the environment, and how can environmental chemists work to mitigate these effects?
answered
Feb 12
in
Chemical education
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93
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Determine the standard enthalpy change for the reaction: Fe2O3 (s) + 3CO (g) → 2Fe (s) + 3CO2 (g)given the following values of standard enthalpy of formation:ΔHf° [Fe2O3 (s)] = -824 kJ/mol ΔHf° [CO2 (g)] = -393.5 kJ/mol ΔHf° [CO (g)] = -110.5 kJ/mol ΔHf° [Fe (s)] = 0 kJ/mol
answered
Feb 4
in
Chemical thermodynamics
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votes
91
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How does changing the concentration of a reactant affect the rate of a chemical reaction, and can this relationship be quantified using experimental data?
answered
Jan 31
in
Chemical kinetics
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75
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How would a decrease in pH affect the equilibrium position of a redox reaction involving a metal and its corresponding metal ion, with respect to the oxidation-reduction potential? Provide an explanation for your answer.
answered
Jan 30
in
Chemical equilibrium
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98
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How can X-ray diffraction analysis be used to determine the composition and crystal structure of a mineral sample?
answered
Jan 30
in
Analytical Chemistry
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73
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Calculate the change in entropy and enthalpy for the reaction of iron (III) oxide with carbon monoxide to form iron and carbon dioxide, given the following information:Fe2O3(s) + 3CO(g) → 2Fe(s) + 3CO2(g)ΔH°f (Fe2O3) = -824.2 kJ/molΔH°f (CO) = -110.5 kJ/molΔH°f (Fe) = 0 kJ/molΔH°f (CO2) = -393.5 kJ/molΔS° (Fe2O3) = 87.4 J/K molΔS° (CO) = 197.9 J/K molΔS° (Fe) = 27.3 J/K molΔS° (CO2) = 213.6 J/K mol
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Jan 23
in
Inorganic Chemistry
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45
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According to Bronfenbrenner's theory, why is it important to understand the macrosystem?
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Jan 20
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Psychology
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votes
42
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Why is correlation not always sufficient to establish causation?
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Jan 17
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Psychology
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59
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When treating OCD, what is exposure and response prevention?
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Jan 17
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Psychology
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50
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Why is the situational crime prevention theory used in forensic psychology?
answered
Jan 16
in
Psychology
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