Questions by ElyseY075419

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1 answer 21 views

What is the mechanism of a nucleophilic substitution reaction that occurs between an alkyl halide and an alcohol in the presence of a base?

asked 5 days ago in Organic Chemistry

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1 answer 15 views

How does the temperature affect the folding and unfolding of a protein using molecular dynamics simulations? Can increasing or decreasing the temperature cause unusual protein conformations or even denaturation?

asked Feb 17 in Computational Chemistry

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1 answer 36 views

How can we design drugs that specifically target and inhibit the growth of gram-negative bacteria, such as E. coli or P. aeruginosa, while leaving the beneficial gut microbiota unharmed?

asked Feb 12 in Medicinal Chemistry

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1 answer 8 views

How can we design a drug that targets the root cause of genetic disorders, such as gene mutations, and effectively delivers the therapeutic agent to the target tissues and cells in the human body?

asked Feb 12 in Medicinal Chemistry

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1 answer 38 views

What is the mechanism by which chlorofluorocarbons (CFCs) deplete the ozone layer? How does their chemical structure contribute to this process?

asked Feb 12 in Environmental Chemistry

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1 answer 50 views

How can the risk of accidental release and exposure to hazardous chemicals during storage and transportation be minimized, while maintaining efficiency and cost-effectiveness in the design of a system?

asked Feb 10 in Chemical engineering

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1 answer 54 views

How can the chemical properties of a specific compound be optimized to enhance its efficacy in treating a specific skin disease while minimizing potential side effects?

asked Feb 6 in Medicinal Chemistry

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1 answer 29 views

How can students learn and understand chemical concepts effectively despite limited access to laboratory equipment and facilities?

asked Feb 5 in Chemical education

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1 answer 56 views

Here's a precise problem for a chemistry student to solve, based on Thermochemistry and the Enthalpy of Desorption Calculations:Given the following data for the adsorption of hydrogen gas on a metal surface:- Initial pressure of hydrogen gas = 1 atm- Final pressure of hydrogen gas after adsorption = 0.2 atm- Temperature = 298 K- Surface area of the metal = 5 cm^2- Enthalpy of Desorption of hydrogen gas on the metal surface = -40 kJ/molCalculate the enthalpy change (in kJ) for the adsorption of hydrogen gas on the metal surface.

asked Feb 4 in ThermoChemistry

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1 answer 45 views

Design a process for the purification of crude caffeine extracted from coffee beans, using available techniques and equipment at your disposal, while ensuring high purity and minimum loss of product.

asked Feb 4 in Chemical engineering

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1 answer 63 views

Calculate the standard Gibbs free energy change (ΔG°) for the reaction below at 298 K:2NO(g) + O2(g) → 2NO2(g)Given:ΔG°f(NO2(g)) = -51.29 kJ/molΔG°f(NO(g)) = 86.67 kJ/molΔG°f(O2(g)) = 0 kJ/mol

asked Feb 3 in Physical Chemistry

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1 answer 45 views

Calculate the standard enthalpy of formation of carbon dioxide (CO2) using the following information:C(graphite) + O2(g) -> CO2(g), ΔH° = -393.5 kJ/molC(graphite) + 2H2(g) -> CH4(g), ΔH° = -74.8 kJ/mol2H2(g) + O2(g) -> 2H2O(l), ΔH° = -572.0 kJ/mol

asked Feb 3 in ThermoChemistry

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1 answer 33 views

Calculate the standard enthalpy change of the reaction of 2 moles of carbon monoxide and 1 mole of oxygen gas to form 2 moles of carbon dioxide gas, given that the enthalpy change for the decomposition of 2 moles of carbon dioxide to 2 moles of carbon monoxide and 1 mole of oxygen gas is -566 kJ/mol, and the enthalpy change for the combustion of 1 mole of carbon to form carbon dioxide gas is -394 kJ/mol. Use Hess's Law to solve the problem.

asked Feb 3 in Chemical reactions

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1 answer 65 views

Calculate the standard enthalpy change for the fusion reaction of solid lithium at its melting point, assuming that the reaction is carried out under standard conditions.

asked Feb 3 in Chemical thermodynamics

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1 answer 41 views

Calculate the standard enthalpy change for the formation of ethylene glycol (C2H6O2) from its elements given that the standard enthalpies of formation of carbon dioxide, water, and ethylene glycol are -393.5 kJ/mol, -285.8 kJ/mol, and -421.1 kJ/mol respectively.

asked Feb 3 in Chemical thermodynamics

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1 answer 50 views

What is the structure of the metal centre in the active site of the metalloenzyme carbonic anhydrase and how does this structure contribute to its function in catalysing the hydration of carbon dioxide?

asked Jan 31 in Coordination Chemistry

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1 answer 59 views

Calculate the heat of hydration for the reaction between anhydrous copper sulfate (CuSO4) and water (H2O), given that the mass of anhydrous copper sulfate used is 10 g and the temperature of the solution increases from 25°C to 35°C. The molar heat of hydration for copper sulfate pentahydrate (CuSO4.5H2O) is -90.1 kJ/mol.

asked Jan 23 in ThermoChemistry

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1 answer 78 views

A chemistry student needs to determine the percentage of iron (Fe) present in a given iron ore sample using gravimetric analysis. The student is provided with the mass of the iron ore sample and a standardized solution of potassium dichromate (K2Cr2O7) to use for the analysis. What is the percentage of iron (Fe) in the given iron ore sample?

asked Jan 22 in Analytical Chemistry

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1 answer 69 views

What does the psychological model suggest about the development of paranoia?

asked Jan 20 in Psychology

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1 answer 30 views

Compare the different stages of psychosocial development according to Erik Erikson.

asked Jan 17 in Psychology

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