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What is the mechanism of action for a specific class of drugs and how does it affect the interactions of enzymes and receptors within the body?

asked Mar 1 in Medicinal Chemistry by TheScientist (138k points)

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What is the enthalpy of precipitation for the reaction between 50 mL of 0.2 M AgNO3 and 50 mL of 0.2 M NaCl? Given that the final volume of the solution is 100 mL and the temperature remains constant at 25°C.

asked Mar 1 in ThermoChemistry by TheScientist (138k points)

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How much heat is released when 20 grams of methane (CH4) undergoes complete combustion?

asked Mar 1 in Chemical reactions by TheScientist (138k points)

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What is the formal charge on the central atom in the compound SO$_3$? Provide a step-by-step calculation to arrive at your answer.

asked Mar 1 in Inorganic Chemistry by TheScientist (138k points)

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What are the misconceptions that students commonly hold about chemical bonding and molecular structure, and how do they affect their ability to understand and predict chemical reactions?

asked Mar 1 in Chemical education by TheScientist (138k points)

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What is the formal charge of the sulfur atom in SO4^2- ion?

asked Mar 1 in Inorganic Chemistry by TheScientist (138k points)

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What is the standard enthalpy change for the vaporization of 50.0 g of water at a temperature of 298.15 K and a pressure of 1 atm? The molar enthalpy of vaporization of water is 40.7 kJ/mol.

asked Mar 1 in Chemical thermodynamics by TheScientist (138k points)

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What is the theoretical yield of nylon-6,6 that can be produced from the reaction of 10 grams of adipic acid and 10 grams of hexamethylenediamine, assuming no side reactions occur and all reactants are completely consumed?

asked Mar 1 in Chemical synthesis by TheScientist (138k points)

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What is the amount of energy required to break the carbon-hydrogen bond in a methane molecule (CH4) if the bond dissociation energy (BDE) of C-H is 413 kJ/mol?

asked Mar 1 in Chemical reactions by TheScientist (138k points)

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How does the wavelength of light affect the photochemical properties of photosensitive materials used in photography?

asked Feb 28 in PhotoChemistry by TheScientist (138k points)

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What are the key steps involved in the synthesis of polyvinyl chloride from vinyl chloride monomer, and how can these steps be optimized to enhance the yield and quality of the resulting polymer?

asked Feb 28 in Chemical synthesis by TheScientist (138k points)

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How does the wavelength of light affect the efficiency of photosensitizers in photochemical reactions?

asked Feb 28 in PhotoChemistry by TheScientist (138k points)

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How can we modify the synthesis methods for carbon nanotubes to achieve a longer tube length?

asked Mar 1 in Materials Chemistry by TheScientist (138k points)

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What is the activation energy for the oxidation of copper in a 1 M copper sulfate solution with a standard reduction potential of +0.34 V at 298 K, given that the exchange current density is 5.6 x 10^-6 Acm^-2 and the reaction order is unity?

asked Mar 1 in ElectroChemistry by TheScientist (138k points)

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How can the use of assistive technology in the chemistry classroom be improved to better support students with learning disabilities, such as dyslexia, in understanding and retaining chemical concepts?

asked Mar 1 in Chemical education by TheScientist (138k points)

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What is the heat of hydration of calcium chloride when 50 grams of calcium chloride is dissolved in 200 mL of water at 25°C? Given the heat of hydration of calcium chloride is -82.8 kJ/mol.

asked Mar 1 in ThermoChemistry by TheScientist (138k points)

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What is the formal charge of the central atom in the compound SF4 (sulfur tetrafluoride)? Show your calculation and explain whether the molecule is overall neutral or has a partial charge.

asked Mar 1 in Inorganic Chemistry by TheScientist (138k points)

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What is the activation energy of the following reaction at room temperature?2NO(g) + Cl2(g) → 2NOCl(g)The rate constant of the reaction is 0.00313 L mol^-1 s^-1 at 25°C and increases to 0.05012 L mol^-1 s^-1 at 35°C.

asked Mar 1 in Chemical kinetics by TheScientist (138k points)

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What is the standard enthalpy change for the reaction of zinc oxide and hydrochloric acid to form zinc chloride and water, given that all reactants and products are solids at standard temperature and pressure?

asked Mar 1 in Chemical thermodynamics by TheScientist (138k points)

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What is the rate of diffusion of oxygen through a 2 cm thick slab of air at 25°C and 1 atm pressure? The diffusivity of oxygen is 0.20 cm^2/s.

asked Mar 1 in Physical Chemistry by TheScientist (138k points)

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