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What is the reaction quotient Qc for the following equilibrium reaction at 25°C, given the molar concentrations of the reactants and products:2NO2(g) ⇌ 2NO(g) + O2(g)[NO] = 0.50 M, [O2] = 0.25 M, and [NO2] = 0.75 M.
answered
3 days
ago
in
Chemical thermodynamics
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21
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How does the presence of reaction intermediates influence the rate of a chemical reaction? Provide experimental evidence to support your answer using a specific reaction and varying the concentration of the intermediate.
answered
3 days
ago
in
Chemical kinetics
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20
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What is the balanced chemical equation for the combustion reaction of propane (C3H8) with oxygen gas (O2)?
answered
Feb 17
in
Chemical reactions
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votes
40
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How can we use photochemical degradation to reduce the concentration of toxic pollutants such as pesticides, herbicides and industrial chemicals in aquatic environmnets?
answered
Feb 14
in
PhotoChemistry
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9
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How can we design an efficient system for the recovery of valuable metals such as gold, silver, and copper from electronic waste, while minimizing the amount of hazardous waste generated in the process?
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Feb 12
in
Chemical engineering
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votes
36
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How can the stability of polymers be increased or improved to prevent degradation?
answered
Feb 10
in
Polymer Chemistry
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votes
36
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How can technology be integrated effectively into chemistry education to enhance student understanding and engagement, despite the challenges and barriers that educators face in implementing it?
answered
Feb 6
in
Chemical education
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votes
61
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Calculate the standard enthalpy change for the reaction in which 50.0 mL of 1.0 M HCl is mixed with 50.0 mL of 1.0 M NaOH in a constant pressure calorimeter using the following data: the temperature of the HCl and NaOH solutions are both initially 25.0 °C, and the temperature of the mixture increases to 32.0 °C. The specific heat of the solution is 4.18 J/(g·°C) and the density of the solution is 1.00 g/mL. The reaction is: HCl(aq) + NaOH(aq) → NaCl(aq) + H2O(l)
answered
Feb 3
in
Chemical thermodynamics
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47
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Calculate the standard enthalpy change for the following reaction: 2NaOH(aq) + H2SO4(aq) → Na2SO4(aq) + 2H2O(l) Given the following information: - The standard enthalpy of formation of NaOH(aq) is -469.20 kJ/mol - The standard enthalpy of formation of H2SO4(aq) is -814.50 kJ/mol - The standard enthalpy of formation of Na2SO4(aq) is -1388.10 kJ/mol Note: Make sure to balance the equation and use Hess's Law if necessary.
answered
Feb 3
in
Chemical thermodynamics
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votes
97
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How does the pH level affect the concentration of heavy metals in water affected by acid mine drainage, and what chemical processes occur to cause this impact on water quality?
answered
Jan 30
in
Environmental Chemistry
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43
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How can a chemical engineer develop a process for the production of 1,4-dioxane?
answered
Jan 30
in
Chemical engineering
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66
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Calculate the current density of an electrochemical cell where a nickel electrode is oxidized to form nickel (II) ions, while a copper electrode is reduced by the nickel (II) ions. The cell has a voltage of 0.65 volts and a resistance of 50 ohms. The surface area of the nickel electrode is 10 cm² while that of the copper electrode is 15 cm². The current density of the electrochemical cell is expressed in A/cm².
answered
Jan 23
in
ElectroChemistry
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votes
34
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Why do some researchers suggest that bystander intervention may be an effective way to prevent violence?
answered
Jan 20
in
Psychology
0
votes
64
views
Why is the peer support approach effective?
answered
Jan 20
in
Psychology
0
votes
43
views
According to the framing effect, what influences how people perceive information?
answered
Jan 17
in
Psychology
0
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63
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How does biopsychology explain mental disorders?
answered
Jan 17
in
Psychology
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votes
54
views
When evaluating a theory, what is the criterion for falsifiability?
answered
Jan 17
in
Psychology
0
votes
34
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How do psychologists study human motivation?
answered
Jan 16
in
Psychology
0
votes
47
views
According to the sociocultural model, what is the cause of eating disorders?
answered
Jan 16
in
Psychology
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32
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What is the main criticism of the biological approach?
answered
Jan 16
in
Psychology
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