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33
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How does the reaction rate of the decomposition of hydrogen peroxide in the presence of a catalyst vary with increasing pressure?
answered
1 day
ago
in
Chemical kinetics
0
votes
22
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What is the relationship between the electronic and optical properties of perovskite materials, and how can this relationship be accurately calculated using quantum chemistry methods?
answered
5 days
ago
in
Quantum Chemistry
0
votes
38
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How does the activation energy of the electron transfer process affect the rate of a redox reaction, and how can this be experimentally determined using quantum chemical calculations?
answered
Feb 17
in
Quantum Chemistry
0
votes
31
views
How do the surface-active agents in detergents and cleaning agents interact with oil and water to effectively remove stains and grime from different surfaces?
answered
Feb 17
in
Surface Chemistry
0
votes
35
views
What is the mechanism of nucleophilic substitution reaction in halogenoalkanes? Explain the role of the nucleophile and the leaving group in the reaction. Provide an example of a nucleophilic substitution reaction and predict the product formed.
answered
Feb 14
in
Organic Chemistry
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10
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How can the prediction of chemical reactivity and selectivity using quantum chemistry tools help in designing more efficient and selective catalysts for industrial processes?
answered
Feb 10
in
Quantum Chemistry
0
votes
47
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Calculate the standard enthalpy of formation of potassium nitrate (KNO3) given the following information:- Heat of combustion of potassium is -468 kJ/mol- Heat of combustion of nitrogen is -940 kJ/mol- Heat of combustion of oxygen is -283.8 kJ/mol- Heat of formation of KNO3 is -383 kJ/mol.
answered
Feb 3
in
Chemical thermodynamics
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45
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Calculate the standard enthalpy change for the precipitation reaction that occurs when 100 mL of 0.2 M lead nitrate solution reacts with 100 mL of 0.1 M sodium iodide solution to form solid lead iodide and aqueous sodium nitrate. The balanced chemical equation for the reaction is:Pb(NO3)2(aq) + 2 NaI(aq) → PbI2(s) + 2 NaNO3(aq)Given: - Molar mass of Pb(NO3)2 = 331.20 g/mol - Molar mass of NaI = 149.89 g/mol - Density of 0.2 M lead nitrate solution = 1.055 g/mL - Density of 0.1 M sodium iodide solution = 1.04 g/mL - Specific heat capacity of the reaction mixture is 4.18 J/(g · °C) - The initial temperature of the reaction mixture and the surroundings is 25 °C.
answered
Feb 3
in
Chemical thermodynamics
0
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52
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Calculate the enthalpy of vaporization for water given the following information: The boiling point of water is 100°C and its specific heat capacity is 4.18 J/g°C. The density of water at its boiling point is 0.958 g/mL and the heat of fusion for water is 40.7 kJ/mol. The molar mass of water is 18.015 g/mol.
answered
Jan 23
in
ThermoChemistry
0
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62
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A student has 5 grams of sulfur and 8 grams of oxygen. When the two are reacted to form sulfur dioxide, which one is the limiting reactant, and how much sulfur dioxide can be produced?
answered
Jan 22
in
Chemical reactions
0
votes
31
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According to Stanley Milgram's obedience experiment, why did participants continue to administer electric shocks to a confederate, despite their pleas for mercy?
answered
Jan 20
in
Psychology
0
votes
66
views
Who proposed the use of confidence intervals?
answered
Jan 20
in
Psychology
0
votes
35
views
What is the cognitive profile associated with Alzheimer's disease?
answered
Jan 17
in
Psychology
0
votes
55
views
What is the main goal of indigenous psychology?
answered
Jan 16
in
Psychology
0
votes
60
views
According to Beck, why do individuals experience depression?
answered
Jan 16
in
Psychology
0
votes
81
views
What is the 'investment theory of creativity'?
answered
Jan 15
in
Psychology
0
votes
40
views
Who proposed the 'theory of emotional intelligence'?
answered
Jan 15
in
Psychology
0
votes
56
views
How can classical conditioning be applied in the treatment of phobias?
answered
Jan 15
in
Psychology
0
votes
20
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What are the three mental concepts proposed by Freud as per psychoanalytic theory?
answered
Jan 14
in
Psychology
0
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42
views
What is psychotherapy?
answered
Jan 14
in
Psychology
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