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What is the effect of changing the surface functionalization of gold nanoparticles on their stability and reactivity in water, as predicted by molecular dynamics simulations?

asked Feb 3 in Computational Chemistry by FredaThrelke (460 points)

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How does changing the concentration of reactants affect the reaction rate and the profitability of the reaction?

asked Feb 3 in Chemical kinetics by DavisVan083 (490 points)

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Calculate the standard enthalpy change for the sublimation of iodine (I2) using the given information: The standard enthalpy of fusion of iodine is 15.52 kJ/mol and the standard enthalpy of vaporization of iodine is 41.57 kJ/mol.

asked Feb 3 in Chemical thermodynamics by JanetFuw9785 (550 points)

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Calculate the standard enthalpy change for the sublimation of iodine (I2) if 1 mole of I2(s) is converted to 1 mole of I2(g) at 25°C and 1 bar pressure. Given the following information:- The standard enthalpy of fusion of I2 is 15.4 kJ/mol- The standard enthalpy of vaporization of I2 is 41.3 kJ/mol- The standard entropy change for the sublimation of I2 is 62.4 J/mol K.

asked Feb 3 in Chemical thermodynamics by SharylMayo75 (550 points)

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Calculate the standard enthalpy change (∆H°) for the vaporization of 10 grams of water at 100°C, given that the molar heat of vaporization of water is 40.7 kJ/mol.

asked Feb 3 in Chemical thermodynamics by MitchNina52 (290 points)

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Calculate the reaction quotient (Qc) for the following chemical reaction at 25°C: 2SO2(g) + O2(g) ⟶ 2SO3(g)Given the following concentration values:[SO2] = 0.1 M[O2] = 0.05 M[SO3] = 0.3 MWhat is the reaction quotient Qc for this reaction? Is the reaction at equilibrium? If not, in which direction will the reaction proceed to reach equilibrium?

asked Feb 3 in Chemical thermodynamics by JewellAbigai (950 points)

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Calculate the monolayer capacity and specific surface area of a sample of silica gel using BET theory. The sample was found to have a weight of 2.56 g and a total surface area of 260 m²/g. The gas used for adsorption was nitrogen at a temperature of 77 K and a pressure range of 0.01-0.3 P/P₀. The plot of (P/P₀)/(V₀/V) versus P/P₀ generated a straight line with a slope of 4.2×10⁻³.

asked Feb 3 in Surface Chemistry by AprilMcKeown (330 points)

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Calculate the reaction quotient (Q) for the following chemical reaction at a given temperature and pressure: 2 SO2 (g) + O2 (g) ⟶ 2 SO3 (g) The initial concentrations of SO2, O2, and SO3 are 0.2 M, 0.1 M, and 0.3 M, respectively, at a total pressure of 3 atm and a temperature of 298 K.

asked Feb 3 in Chemical thermodynamics by AlannahArand (370 points)

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How does changing the pH of a solution affect the rate of reaction between hydrochloric acid and sodium thiosulfate?

asked Feb 3 in Chemical kinetics by QOAAmanda574 (430 points)

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Compute the electronic band structure, density of states, and optical properties (absorption spectrum, reflectivity, and refractive index) of a graphene sheet using Density Functional Theory (DFT) calculations. Compare the results with experimental measurements and discuss the discrepancies observed, if any.

asked Feb 3 in Computational Chemistry by RCUFermin56 (270 points)

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Calculate the rate of electroplating of copper on a metallic surface at a current of 2.5 amperes for a duration of 3 hours using a copper nitrate solution with a concentration of 0.2 M. Given that the standard potential of the reduction reaction of Cu2+ to Cu is +0.34 V and the charge of one mole of electrons is 96500 C/mol.

asked Feb 3 in ElectroChemistry by CharleneKeen (410 points)

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Calculate the standard enthalpy change (∆H°) for the precipitation reaction between aqueous solutions of silver nitrate (AgNO3) and sodium chloride (NaCl) to form solid silver chloride (AgCl), given that 50.0 mL of 0.100 M AgNO3 and 50.0 mL of 0.100 M NaCl were combined in a calorimeter and the temperature change was recorded as -2.5°C.

asked Feb 3 in Chemical thermodynamics by MathiasHemma (350 points)

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How does changing the concentration of reactants affect the rate of a chemical reaction and the resulting yield of products?

asked Feb 3 in Chemical kinetics by KelleyGriver (490 points)

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Calculate the standard enthalpy change for the precipitation reaction of copper(II) sulfate and sodium hydroxide, given the following balanced chemical equation:CuSO4(aq) + 2NaOH(aq) → Cu(OH)2(s) + Na2SO4(aq)Assume the reaction takes place under standard conditions and the necessary species are present in their standard states. Round your answer to two decimal places.

asked Feb 3 in Chemical thermodynamics by SamiraYount (570 points)

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Calculate the standard enthalpy change (∆H°) for the formation of ammonia (NH3) at 298 K using the following data: N2(g) + 3H2(g) → 2NH3(g) ∆H° = −92.4 kJ/mol Hint: Standard enthalpy change (∆H°) for a reaction is calculated by taking the sum of the standard enthalpies of the products minus the sum of the standard enthalpies of the reactants.

asked Feb 3 in Chemical thermodynamics by HamishChappe (230 points)

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What is the role of chaperones in protein folding and how do they prevent protein aggregation?

asked Feb 3 in BioChemistry by ZVWShalanda (370 points)

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How do chaperones assist in protein folding and prevent misfolding? What is the mechanism behind their action in facilitating proper folding?

asked Feb 3 in BioChemistry by MaeWing7071 (410 points)

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1 answer 34 views

How does changing the reaction conditions, such as the concentration of reactants or the temperature, affect the selectivity of a chemical reaction? Specifically, investigate the effect of varying the concentration of reactants on the selectivity of reaction X.

asked Feb 3 in Chemical kinetics by RZYJacinto4 (470 points)

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How does changing the concentration of reactants affect the rate of reaction and impact the overall profitability of the chemical reaction?

asked Feb 3 in Chemical kinetics by FawnMosher92 (510 points)

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Calculate the pH of a buffer solution consisting of 0.1 M acetic acid and 0.1 M sodium acetate, given that the dissociation constant (Ka) of acetic acid is 1.8x10^-5.

asked Feb 3 in Chemical reactions by YongSheehy6 (550 points)

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