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1
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What are the photochemical properties of the photochromic material used in transition lenses, and how do they cause the lenses to darken when exposed to sunlight, and then lighten when the sunlight is removed?
asked
Feb 22
in
PhotoChemistry
0
votes
1
answer
29
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In the synthesis of alcohols, what is the most effective method for converting an alkene into an alcohol using a catalyst and why?
asked
Feb 21
in
Organic Chemistry
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votes
1
answer
30
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What is the molecular geometry and polarity of H2O?
asked
Feb 21
in
Inorganic Chemistry
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votes
1
answer
31
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How does the intensity of light affect the rate of a chemical reaction involving the decomposition of hydrogen peroxide?
asked
Feb 20
in
Chemical kinetics
0
votes
1
answer
51
views
What is the hybridization of the carbon atom in formaldehyde (H2CO)?
asked
Feb 20
in
Chemical bonding
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votes
1
answer
35
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What is the effect on the formation of a complex ion containing iron(III) and thiocyanate when the pH is changed from acidic to neutral conditions?
asked
Feb 20
in
Chemical equilibrium
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votes
1
answer
28
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What is the effect of nanoparticle size on their surface area to volume ratio and why is it important in catalysis?
asked
Feb 19
in
Physical Chemistry
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votes
1
answer
37
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How does the coordination chemistry of zinc in the active site of carbonic anhydrase enzyme contribute to its enzymatic activity and specificity towards CO2 hydration?
asked
Feb 19
in
Coordination Chemistry
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votes
1
answer
33
views
What is the bond angle in the H2O molecule and how does it affect the molecule's dipole moment? Provide a detailed explanation based on quantum mechanics principles.
asked
Feb 18
in
Physical Chemistry
0
votes
1
answer
71
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How does the activation of G protein-coupled receptors (GPCRs) lead to the activation of downstream signal transduction pathways in biochemical terms?
asked
Feb 13
in
BioChemistry
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votes
1
answer
34
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How does the coordination chemistry of metalloenzymes and metalloproteins affect their biological function? Provide specific examples to support your answer.
asked
Feb 12
in
Coordination Chemistry
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votes
1
answer
68
views
How can the production process for a specific specialty chemical be optimized to reduce production costs while maintaining product quality and purity?
asked
Feb 10
in
Chemical engineering
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votes
1
answer
90
views
How can the process for the production of a specific drug be optimized to decrease the reaction time and increase the yield of the product, while maintaining the desired purity and quality of the pharmaceutical drug?
asked
Feb 10
in
Chemical engineering
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votes
1
answer
37
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How can the knowledge of structure-activity relationship be utilized in the design and development of new drugs to treat cardiovascular diseases, such as heart failure, hypertension and angina pectoris?
asked
Feb 7
in
Medicinal Chemistry
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votes
1
answer
36
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How can magnetic resonance spectroscopy be used to determine the purity of a chemical compound? Provide a step-by-step explanation of the process and include an example.
asked
Feb 6
in
Physical Chemistry
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votes
1
answer
39
views
How can chemistry students effectively perform experiments and learn practical skills when they have limited access to laboratory equipment and facilities?
asked
Feb 4
in
Chemical education
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votes
1
answer
38
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How can chemistry educators incorporate more practical applications of chemistry in their teaching methods to enhance students' understanding of the subject?
asked
Feb 4
in
Chemical education
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votes
1
answer
39
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How can a chemical engineer develop a cost-effective process for the production of 1 ton of ethylene glycol using a fixed-bed catalytic reactor?
asked
Feb 4
in
Chemical engineering
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votes
1
answer
85
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Calculate the standard enthalpy change of formation for ethanoic acid, given the following standard enthalpy of combustion data:- Ethanol: -1367 kJ/mol- Carbon dioxide: -393.5 kJ/mol- Water: -285.8 kJ/molThe chemical equation for the formation of ethanoic acid is:2C2H5OH + 2O2 → 2CH3COOH + 2H2O
asked
Feb 3
in
Chemical thermodynamics
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votes
1
answer
101
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A student needs to find out how much heat is released or absorbed when 100 mL of 0.1 mol/L solution of barium chloride (BaCl2) is mixed with 150 mL of 0.1 mol/L solution of sodium sulfate (Na2SO4) at 25°C. Given the enthalpy of precipitation of BaSO4 as -256 kJ/mol, calculate the enthalpy change (in kJ) for the reaction that occurs and determine whether the reaction is exothermic or endothermic.
asked
Jan 22
in
ThermoChemistry
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