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31
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What is the coordination geometry of the heme group in the active site of hemoglobin and how does it facilitate oxygen binding and release?
answered
Feb 19
in
Coordination Chemistry
0
votes
34
views
How does the composition of glasses affect their refractive index and dispersion, and how can this knowledge be applied to develop glasses with specific optical properties for use in applications such as lenses, fiber optics, and display technology?
answered
Feb 18
in
Materials Chemistry
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votes
38
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How can the utilization of renewable energy sources like solar, wind, and hydro power be optimized to reduce their impact on the environment and make them more economically viable in comparison to non-renewable energy sources such as coal, oil and gas?
answered
Feb 14
in
Environmental Chemistry
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41
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What is the role of metal ions in the structure and function of metalloenzymes and metalloproteins, and how does their coordination chemistry contribute to their catalytic activity?
answered
Feb 13
in
Coordination Chemistry
0
votes
82
views
What is the mechanism of how Chlorofluorocarbons (CFCs) react with ozone gas in the atmosphere and how does this ultimately lead to the depletion of the ozone layer?
answered
Feb 12
in
Environmental Chemistry
0
votes
42
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How can the design of a chemical reactor be optimized for the production of 1000 kg of ammonia per hour, given the reaction rate and equilibrium constants for the Haber process, as well as the desired temperature and pressure conditions?
answered
Feb 6
in
Chemical engineering
0
votes
31
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Design a new drug for a specific type of cancer, outlining the molecular structure and mechanism of action, considering its effectiveness, safety profile, and potential side effects, using medicinal chemistry principles and techniques.
answered
Feb 4
in
Medicinal Chemistry
0
votes
73
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Design a heat exchanger for a specific process in which a 50,000 kg/day of a mixture with a specific heat capacity of 3.5 kJ/kg.K needs to be heated from 20°C to 70°C using a hot stream of 100,000 kg/day of a fluid with a temperature of 150°C. The heat exchanger needs to operate with a heat transfer coefficient of at least 400 W/m2.K and the pressure drop across the heat exchanger should be no more than 0.5 bar. What type of heat exchanger would be most suitable and what are the dimensions required to achieve the desired performance?
answered
Feb 4
in
Chemical engineering
0
votes
84
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Calculate the standard enthalpy change for the neutralization of 25 mL of 0.10 M hydrochloric acid with 25 mL of 0.10 M sodium hydroxide. Assume the specific heat capacity of the solution to be 4.18 J/(g*K) and the density of the solution to be 1.00 g/mL. The temperature change observed during the reaction was 4.5°C.
answered
Feb 3
in
Chemical thermodynamics
0
votes
86
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Calculate the reaction quotient, Q, for the following reaction at room temperature:$$\ce{CH4(g) + 2O2(g) -> CO2(g) + 2H2O(g)}$$Given:- Partial pressure of methane, $\ce{CH4}$ = 0.25 atm- Partial pressure of oxygen, $\ce{O2}$ = 0.75 atm- Partial pressure of carbon dioxide, $\ce{CO2}$ = 0.0 atm- Partial pressure of water vapor, $\ce{H2O(g)}$ = 0.0 atmUse Q to determine if the reaction is at equilibrium, or if it will shift towards the products or reactants to reach equilibrium.
answered
Feb 3
in
Chemical thermodynamics
0
votes
69
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Calculate the bond dissociation energy of the O-H bond in a water molecule (H2O) given the enthalpy change for the reaction:H2O (g) → H2 (g) + 1/2 O2 (g)ΔH = +483.6 kJ/mol(Note: the bond dissociation energy represents the energy required to break a bond into its constituent atoms.)
answered
Jan 23
in
ThermoChemistry
0
votes
50
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Identify the number of stereoisomers for a molecule with the molecular formula C5H10O that contains a chiral carbon atom.
answered
Jan 21
in
Organic Chemistry
0
votes
60
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Please evaluate the bystander effect.
answered
Jan 20
in
Psychology
0
votes
163
views
According to cognitive dissonance theory, what is the relationship between behaviour and attitude?
answered
Jan 17
in
Psychology
0
votes
39
views
What is the criticism of the concept of fully functioning person in animal psychology?
answered
Jan 16
in
Psychology
0
votes
62
views
What is demand characteristics?
answered
Jan 15
in
Psychology
0
votes
72
views
According to the third variable problem in correlational research, what does it refer to?
answered
Jan 15
in
Psychology
0
votes
54
views
What is the life history theory?
answered
Jan 15
in
Psychology
0
votes
36
views
What are the limitations of humanistic psychology?
answered
Jan 13
in
Psychology
0
votes
53
views
Which mineral do native americans use to decorate items?
answered
Jan 8
in
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