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What is the optimum reaction conditions (temperature, pressure, catalyst, etc.) for the synthesis of polystyrene from styrene monomer to yield a maximum percentage yield and molecular weight?
asked
Feb 22
in
Chemical synthesis
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1
answer
26
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How does the monomer selection and polymerization process affect the optical properties of the resulting polymer-based optical material?
asked
Feb 21
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Polymer Chemistry
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32
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What is the equilibrium constant expression for the following gas phase reaction at 25°C?N2(g) + 3H2(g) ⇌ 2NH3(g)Given the equilibrium concentrations of N2, H2 and NH3, calculate the value of the equilibrium constant (Kc) for this reaction.
asked
Feb 20
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Chemical equilibrium
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42
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How can we reduce the carbon footprint of an industrial process while maintaining its efficiency and productivity? Provide specific strategies and examples of their implementation in industry.
asked
Feb 14
in
Environmental Chemistry
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1
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56
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What hybrid orbitals are present in the central atom of a molecule of carbon dioxide (CO2)?
asked
Feb 13
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Chemical bonding
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1
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35
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How can we design drugs that effectively target a specific type of bacteria without harming the beneficial bacteria in the body?
asked
Feb 12
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Medicinal Chemistry
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1
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34
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How can computational chemistry and molecular modeling help in predicting the behavior of molecules in reactions and designing new molecules with specific properties?
asked
Feb 5
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Physical Chemistry
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32
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How can medicinal chemists design drugs to target specific mutations in genetic disorders, such as cystic fibrosis or sickle cell anemia, while avoiding off-target effects on healthy cells?
asked
Feb 5
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Medicinal Chemistry
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1
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66
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Calculate the polarization in an electrochemical cell consisting of a zinc electrode and a copper electrode. The electrode potentials of zinc and copper are -0.76 V and +0.34 V, respectively. The resistance of the electrolyte solution between the electrodes is 10 ohms, and the current flowing through the cell is 0.5 A.
asked
Feb 3
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ElectroChemistry
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54
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Calculate the heat of formation of Methane (CH4), given the following enthalpy changes:- Enthalpy change of combustion of methane = -890.4 kJ mol^-1- Enthalpy change of formation of water = -285.8 kJ mol^-1- Enthalpy change of formation of carbon dioxide = -393.5 kJ mol^-1
asked
Jan 23
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Chemical bonding
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1
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67
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Calculate the enthalpy change for the desorption of water vapor from a silica gel desiccant using the following information:Mass of silica gel desiccant = 5.0 gInitial temperature of silica gel desiccant and water vapor = 25.0 °CFinal temperature after desorption of water vapor = 40.0 °CSpecific heat capacity of silica gel = 1.16 J/g°CHeat absorbed by the calorimeter = -222.4 JAssume all heat absorbed by calorimeter comes solely from the desorption of water vapor.
asked
Jan 23
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ThermoChemistry
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1
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64
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When evaluating a theory, what is the criterion for scope?
asked
Jan 20
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Psychology
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1
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75
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According to the schema theory, how do people make sense of new information?
asked
Jan 16
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Psychology
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1
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100
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What is activity theory and how does it differ from disengagement theory?
asked
Jan 16
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Psychology
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1
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77
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What is the main focus of neuropsychology?
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Jan 16
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Psychology
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1
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36
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How does the social exchange theory differ from equity theory in relationships?
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Jan 15
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Psychology
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1
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60
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What is scaffolding?
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Jan 14
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Psychology
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1
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78
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What is the role of the therapist in psychoanalysis?
asked
Jan 13
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Psychology
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1
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52
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What kind of process occurs without the need for a continual input of energy from some external source?
asked
Jan 7
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Science
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1
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38
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What is the wheeled robot developed by nasa to explore the surface of mars?
asked
Jan 7
in
Science
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