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1
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What is the rate of reaction for the decomposition of hydrogen peroxide when the initial concentration is 0.1 M, and the reaction produces 0.02 moles of oxygen gas in 30 seconds?
asked
Feb 22
in
Chemical reactions
0
votes
1
answer
34
views
How do the properties of supramolecular systems change with changes in temperature?
asked
Feb 22
in
Physical Chemistry
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1
answer
38
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What is the oxidation state of chromium in Cr2O3 and how does this relate to its role as an oxidizing agent in redox reactions?
asked
Feb 22
in
Chemical reactions
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votes
1
answer
32
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What is the molecular geometry of the molecule NH3 (Ammonia)?
asked
Feb 21
in
Chemical bonding
0
votes
1
answer
40
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How does the light intensity affect the rate of photochemical reactions in the presence of a specific photosensitive molecule?
asked
Feb 20
in
PhotoChemistry
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1
answer
27
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What is the maximum adsorption capacity of a metal oxide surface for a specific type of molecule at a particular temperature, as determined through the Langmuir adsorption isotherm equation?
asked
Feb 20
in
Surface Chemistry
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1
answer
31
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What is the effect of varying reactant concentrations on the reaction rate and subsequent safety precautions to be taken in a particular chemical reaction?
asked
Feb 20
in
Chemical kinetics
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1
answer
37
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What is the balanced chemical equation for the reaction between aluminium and copper (II) sulfate, and what type of redox reaction is this? (Hint: identify the oxidation state of each element before and after the reaction)
asked
Feb 17
in
Chemical reactions
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votes
1
answer
45
views
What are the mechanisms responsible for the phosphorescent properties of certain materials and how can we utilize this knowledge to design more efficient phosphorescent materials for use in various applications?
asked
Feb 14
in
PhotoChemistry
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votes
1
answer
48
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What type of bonding exists between the atoms of oxygen molecule? Explain your answer in detail.
asked
Feb 13
in
Chemical bonding
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1
answer
71
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How do energy transfer processes in molecular dynamics affect the stability and reactivity of a compound under different reaction conditions?
asked
Feb 13
in
Quantum Chemistry
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1
answer
74
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How can we design an interactive approach to enhance basic chemistry knowledge among individuals with limited exposure to chemistry in everyday life?
asked
Feb 12
in
Chemical education
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votes
1
answer
76
views
How can the sensitivity and response time of a polymer-based sensor be improved for detecting harmful gases in industrial settings?
asked
Feb 10
in
Polymer Chemistry
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1
answer
40
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How can magnetic resonance spectroscopy be used to determine the purity and concentration of a sample of aspirin? Provide a step-by-step explanation of the process and discuss the factors that can affect the accuracy of the results.
asked
Feb 5
in
Physical Chemistry
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1
answer
38
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How can chemistry teachers provide better support for students with learning disabilities in order to help them understand complex chemical concepts and perform well in exams?
asked
Feb 5
in
Chemical education
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1
answer
86
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Find the oxidation state of chromium in the compound K2Cr2O7.
asked
Feb 4
in
Chemical reactions
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votes
1
answer
108
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Design a heat exchanger for the production of sulfuric acid at a flow rate of 1000 liters per hour. The inlet temperature of the acid is 80°C and the desired outlet temperature is 30°C. The cooling water is available at 20°C and has a flow rate of 2000 liters per hour. Determine the required heat transfer area of the heat exchanger assuming the overall heat transfer coefficient is 800 W/(m²K). What material would you recommend for the heat exchanger tubes and why?
asked
Feb 4
in
Chemical engineering
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1
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91
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Calculate the polarization that occurs in an electrochemical cell when a current of 2 A flows through it for 10 minutes. The electrode area is 25 cm², and the current efficiency is 95%. The activation energy is 80 kJ/mol, and the reaction quotient is 2.5 x 10⁻⁵. The temperature of the cell is 25°C. Find the polarization resistance and the total polarization of the cell.
asked
Feb 3
in
ElectroChemistry
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votes
1
answer
86
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What is the pH of a 0.01 M solution of HCl? Use a pH meter to determine the pH of the solution and explain the procedure you used to obtain the result.
asked
Jan 31
in
Analytical Chemistry
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1
answer
73
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Calculate the heat of formation of methane (CH4) given the following values: - The standard enthalpy of combustion of methane is -890.3 kJ/mol- The bond energies are as follows: C-H = 413 kJ/mol and C-C = 348 kJ/mol.
asked
Jan 23
in
Chemical bonding
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