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0
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23
views
How does the presence of a catalyst affect the equilibrium of a chemical reaction and the rate of reaction?
answered
3 days
ago
in
Chemical kinetics
0
votes
21
views
What is the step-by-step procedure for the preparation of 2,4-dinitrobenzoic acid from benzoic acid and nitric acid, and what is the percentage yield obtained when starting with 10 grams of benzoic acid and excess nitric acid?
answered
3 days
ago
in
Chemical synthesis
0
votes
23
views
What is the molecular geometry and bond angle of methane molecule (CH4) using VSEPR theory?
answered
5 days
ago
in
Quantum Chemistry
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votes
24
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What temperature, pressure, and chemical conditions are required for the Haber process to produce ammonia at an optimum rate for fertilizer production, given a certain amount of reactants?
answered
5 days
ago
in
Chemical engineering
0
votes
26
views
What is the mechanism for the formation of an ester from a carboxylic acid and an alcohol, and how does the type of catalyst used affect the reaction rate?
answered
5 days
ago
in
Organic Chemistry
0
votes
31
views
How does the concentration of an emulsifying agent affect the stability of a water-in-oil emulsion?
answered
Feb 18
in
Surface Chemistry
0
votes
26
views
What is the balanced chemical equation for the synthesis reaction between sodium and chlorine gas to produce sodium chloride?
answered
Feb 17
in
Chemical reactions
0
votes
27
views
How does the addition of functional groups such as oxygen, nitrogen or sulfur affect the electronic properties of graphene and its potential use in electronic devices?
answered
Feb 17
in
Materials Chemistry
0
votes
31
views
How can practical applications of chemistry be incorporated into the curriculum to improve the understanding and relevance of the subject for students?
answered
Feb 5
in
Chemical education
0
votes
71
views
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
0
votes
74
views
How does the adsorption of reactant molecules onto a heterogeneous catalyst surface promote chemical reactions, and what are the different mechanisms involved in heterogeneous catalysis?
answered
Jan 31
in
Surface Chemistry
0
votes
69
views
How can X-ray fluorescence spectroscopy be used to accurately identify and quantify the presence of specific elements in a complex sample matrix such as soil or rock samples?
answered
Jan 30
in
Analytical Chemistry
0
votes
53
views
How can the presence of a specific compound, such as caffeine, be identified in a sample using Raman spectroscopy? What are the characteristic Raman peaks of caffeine and how can they be used to differentiate caffeine from other compounds present in the sample?
answered
Jan 29
in
Analytical Chemistry
0
votes
52
views
Calculate the enthalpy change for the hydrolysis of 2 moles of sucrose (C12H22O11) into glucose (C6H12O6) and fructose (C6H12O6), given the enthalpy change of hydrolysis for glucose and fructose are -2801 and -2802 kJ/mol respectively.
answered
Jan 23
in
ThermoChemistry
0
votes
58
views
Calculate the amount of heat required to melt 25 grams of ice at 0°C. The enthalpy of fusion of ice is 6.01 kJ/mol.
answered
Jan 23
in
ThermoChemistry
0
votes
81
views
A chemical engineer wants to separate a mixture of ethanol and methanol using a distillation column. The feed to the column contains 30% ethanol and 70% methanol by mole. The engineer wants to obtain a distillate with 80% ethanol and a bottoms product containing no more than 1% ethanol. Determine the number of trays required in the distillation column to achieve this separation. Consider only equilibrium stages and assume that the feed is saturated liquid at its boiling point. The operating pressure of the column is 1 atm.
answered
Jan 22
in
Chemical engineering
0
votes
86
views
What is the balanced equation for the oxidation of ethanol to acetic acid, and what is the reducing agent in this reaction?
answered
Jan 21
in
Organic Chemistry
0
votes
69
views
What does the psychological model suggest about the development of paranoia?
answered
Jan 20
in
Psychology
0
votes
21
views
What is the role of motivation in emotional experiences?
answered
Jan 16
in
Psychology
0
votes
30
views
Who is responsible for the parallel-distributed processing model?
answered
Jan 15
in
Psychology
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