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For a student studying surface chemistry and the adsorption of gases on solid surfaces, a precise problem could be: What is the effect of temperature on the adsorption of nitrogen gas on activated charcoal and how does it change the isotherm?

asked 2 days ago in Surface Chemistry by MavisClawson (510 points)

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For a given organic molecule with a Lewis structure, what is the frequency of infrared radiation that would induce the greatest change in the dipole moment of the molecule?

asked 2 days ago in Quantum Chemistry by LeonShimp55 (550 points)

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Find the standard enthalpy change for the reaction: 2C2H5OH(l) + 9O2(g) --> 6CO2(g) + 8H2O(l) given the following information: Standard enthalpy of formation (ΔHfº) of C2H5OH(l) = -277 kJ/mol Standard enthalpy of formation (ΔHfº) of CO2(g) = -393.5 kJ/mol Standard enthalpy of formation (ΔHfº) of H2O(l) = -285.8 kJ/mol Assume that the reaction occurs at standard conditions.

asked 2 days ago in Chemical thermodynamics by LeonardVande (430 points)

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Find the standard enthalpy change for the formation reaction of methane gas (CH4) from its elements in their standard states, given the following standard enthalpy of formation values: ΔHf°[CH4] = -74.81 kJ/mol ΔHf°[H2] = 0 kJ/mol ΔHf°[C(graphite)] = 0 kJ/mol

asked 2 days ago in Chemical thermodynamics by NellOswalt1 (410 points)

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Find the oxidation state of chromium in the compound K2Cr2O7.

asked 2 days ago in Chemical reactions by EwanSales325 (330 points)

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Explore the relationship between the coordination number and the geometry of transition metal complexes, citing specific examples from the literature.

asked 2 days ago in Coordination Chemistry by MarciaCastel (570 points)

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Explain why some molecules with polar bonds are nonpolar in nature and provide a few examples.

asked 2 days ago in Chemical education by EdmundGopink (230 points)

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Explain the role of ion channels in signal transduction pathways and provide an example of a specific ion channel and its function in cellular signaling.

asked 2 days ago in BioChemistry by AlexandraCru (510 points)

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Explain the mechanism of chelation therapy with reference to coordination chemistry principles and discuss the effectiveness of EDTA as a chelating agent in the treatment of heavy metal poisoning.

asked 2 days ago in Coordination Chemistry by JulianeJeffe (570 points)

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Explain the factors affecting the stability of colloidal dispersion and the phenomenon of coagulation with suitable examples.

asked 2 days ago in Surface Chemistry by TereseTalbot (630 points)

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Explain the differences in the photochemical properties of transition metal complexes based on their ligand environments.

asked 2 days ago in PhotoChemistry by JereBrock920 (470 points)

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Explain how the glass transition temperature of a polymer is influenced by its molecular weight and degree of branching.

asked 2 days ago in Physical Chemistry by DenishaVilla (230 points)

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Does the rate of a photochemical reaction increase linearly with the increase in light intensity, or is there a maximum intensity beyond which no further increase in the rate is observed? Provide experimental evidence to support your answer.

asked 2 days ago in PhotoChemistry by MarciaMathia (410 points)

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Does the concentration of reactants in a chemical reaction affect the reaction yield, and if so, what is the relationship between the two variables?

asked 2 days ago in Chemical kinetics by FlorianRico (610 points)

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Does surface modification of a polymer affect its stability and adhesion properties when used in biomedical applications?

asked 2 days ago in Surface Chemistry by GMBCarmon086 (530 points)

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Does changing the concentration of reactants affect the reaction rate and ultimately, the profitability of the reaction in the synthesis of a particular chemical compound? If so, what is the optimal concentration of reactants that maximizes both the reaction rate and profitability?

asked 2 days ago in Chemical kinetics by Christie65L5 (690 points)

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Dinitrogen tetroxide converts into nitrogen dioxide according to the following equation N2O4(g) ⇋ 2NO2(g). At equilibrium, the concentration of N2O4 is found to be 0.02 M and the concentration of NO2 is found to be 0.08 M. Calculate the equilibrium constant (Kc) for this reaction.

asked 2 days ago in Chemical equilibrium by SoilaThibode (290 points)

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Develop a process for the synthesis and purification of aspirin from salicylic acid, highlighting the key reaction steps and techniques used to obtain a high purity product.

asked 2 days ago in Chemical engineering by DarbyManske (570 points)

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1 answer 38 views

Develop a process for the purification of caffeine from tea leaves using solvent extraction technique. Provide a detailed explanation of the steps involved in the process and the criteria that will determine the efficiency of the procedure.

asked 2 days ago in Chemical engineering by WernerDillar (430 points)

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1 answer 22 views

Develop a polymer-based composite that can withstand extreme heat and high stress conditions, making it suitable for use in turbine engine components in aerospace applications.

asked 2 days ago in Polymer Chemistry by Edmund36D97 (450 points)

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