Recent activity by MichelleHall

1 answer 32 views

What is the effect of molecular weight and processing conditions on the flow behavior of a polymer melt? How does molecular weight distribution affect the viscosity of a polymer melt?

answered Feb 20 in Polymer Chemistry

1 answer 32 views

What is the enthalpy change for the ionization of one mole of magnesium in the gas phase, given that the ionization energy of magnesium is 738 kJ/mol and the electron affinity of magnesium is -50.1 kJ/mol? Show your work and include units in your answer.

answered Feb 20 in ThermoChemistry

1 answer 34 views

What is the coordination environment of zinc in the active site of the enzyme carbonic anhydrase, and how does it contribute to the catalytic activity of the enzyme?

asked Feb 19 in Coordination Chemistry

1 answer 32 views

What is the effect of the concentration of a catalyst on the rate of a chemical reaction and how does this relationship compare to the effect of the concentration of a reactant on the reaction rate in the absence of a catalyst?

answered Feb 18 in Chemical kinetics

1 answer 32 views

How does the choice of adhesive or coating affect the surface properties of a material, and how can these properties be optimized for specific applications?

answered Feb 18 in Surface Chemistry

1 answer 41 views

How can the synthesis of zeolites be optimized to ensure maximum purity, uniformity, and reproducibility of these materials?

answered Feb 14 in Materials Chemistry

1 answer 50 views

What are the optical properties of liquid crystals and how are they used in modern display technologies like LCDs?

asked Feb 13 in Physical Chemistry

1 answer 64 views

What is the total number of ATP molecules generated per glucose molecule during Citric acid cycle and oxidative phosphorylation?

asked Feb 13 in BioChemistry

1 answer 80 views

What is the net gain of ATP, NADH, and FADH2 molecules produced during one cycle of the Citric Acid Cycle, and how are they utilized in the subsequent process of Oxidative Phosphorylation?

answered Feb 13 in BioChemistry

1 answer 71 views

How can the surface properties of a polymer be modified to increase its adhesion to a specific substrate?

answered Feb 11 in Surface Chemistry

1 answer 55 views

How can the processing conditions (e.g. temperature, pressure, shear rate) be optimized to improve the mechanical properties (e.g. ductility, strength) of a specific polymer during its manufacturing process?

answered Feb 10 in Polymer Chemistry

1 answer 105 views

How can the principles of quantum mechanics be applied to develop a quantum computer that can efficiently perform complex calculations in quantum chemistry and materials science?

asked Feb 10 in Quantum Chemistry

1 answer 31 views

How can the mechanical properties, degradation rate, and cell response of a polymer-based biomaterial be tailored for optimal tissue engineering applications, taking into consideration the chemical and physical properties of the polymer and the target tissue?

answered Feb 10 in Polymer Chemistry

1 answer 40 views

How can knowledge of a patient's genetic makeup assist in determining the personalized dose and response to a specific drug in the treatment of cancer?

answered Feb 6 in Medicinal Chemistry

1 answer 42 views

How can chemistry educators improve safety protocols in labs and make it a priority in their teaching methods to prevent accidents and injuries?

answered Feb 4 in Chemical education

1 answer 103 views

Calculate the standard enthalpy of formation of Carbon dioxide (CO2), given the enthalpies of formation of Carbon monoxide (CO) and Oxygen gas (O2) as -110.5 kJ/mol and 0 kJ/mol, respectively.

asked Feb 3 in ThermoChemistry

1 answer 92 views

Calculate the equilibrium constant, Kc, for the reaction below at 25°C, if the concentration of CO2 is 0.10 M, the concentration of H2 is 0.20 M, and the concentration of CO is 0.30 M.CO2(g) + H2(g) ⇌ CO(g) + H2O(g)

asked Jan 23 in Physical Chemistry

1 answer 69 views

Calculate the enthalpy of solution of sodium chloride (NaCl) when 10 grams of NaCl is dissolved in 100 mL of water assuming that the specific heat capacity of the solution is equal to the specific heat capacity of water (4.18 J/g°C) and the temperature change is negligible.

asked Jan 23 in ThermoChemistry

1 answer 68 views

Calculate the bond length between two oxygen atoms in an O2 molecule, given that the O-O bond energy is 498 kJ/mol and the reduced mass of the system is 15.9994 g/mol.

answered Jan 23 in Chemical bonding

1 answer 71 views

Calculate the amount of heat absorbed or released when 20 grams of dry ice (solid carbon dioxide) is converted to gaseous carbon dioxide at -78.5°C and atmospheric pressure, given the heat of sublimation of dry ice is 25.2 kJ/mol.

asked Jan 23 in ThermoChemistry

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