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How does the reaction conditions (temperature, pressure, catalysts) affect the yield and quality of polyethylene terephthalate synthesized from terephthalic acid and ethylene glycol?

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

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What is the yield of phenylalanine obtained from the reaction between benzyl chloride and ammonia under specific reaction conditions, and how can it be optimized?

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

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How has the understanding of the atom evolved throughout the history of chemistry, and how has this impacted the development of modern atomic theory?

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

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How does the toxicity of existing drugs affect their effectiveness in treating specific medical conditions?

asked Feb 28 in Medicinal Chemistry by TheScientist (138k points)

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What is the enthalpy change in kJ/mol when 2.00 g of methane (CH4) reacts with excess oxygen to form 1.50 g of carbon dioxide (CO2) and 0.75 g of water (H2O)? (Assume all reactants and products are in their standard states at 25°C and 1 atm pressure.)

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

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How has the understanding of chemical reactions evolved over time and what were some significant milestones in the history of chemistry that contributed to this evolution?

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

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What is the enthalpy change when 25.0 g of potassium chloride is dissolved in 250 mL of water at 25°C? Given that the density of water is 0.997 g/mL and the enthalpy of solution of potassium chloride is -56.7 kJ/mol.

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

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What is the effect of temperature on the behavior of a polymer chain using Monte Carlo simulations? Analyze the changes in the radius of gyration of the polymer chain as temperature is varied.

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

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What is the yield of acetylsalicylic acid produced when 5 grams of salicylic acid is reacted with excess acetic anhydride, assuming a theoretical yield of 7 grams and an actual yield of 4.5 grams?

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

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How can we increase the exposure of chemistry in our everyday lives to promote learning and interest in the subject among students?

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

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How does the vibrational energy of a molecule transfer to its surroundings and what factors influence the rate of this energy transfer?

asked Feb 28 in Quantum Chemistry by TheScientist (138k points)

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How can we increase exposure to chemistry in everyday life for non-science majors?

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

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What is the molar yield of the 2,4,6-trinitrotoluene product obtained from the reaction of 100 grams of toluene with excess nitric acid?

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

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What is the activation energy for the oxidation of hydrogen gas at a Pt electrode, where the overpotential is 100 mV and the current density is 0.5 mA/cm2?

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

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What is the type of bond formed between a lithium ion (Li+) and a fluorine ion (F-)?

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

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What is the underlying mechanism for the photoinduced electron transfer reaction in metal complexes and how does the choice of ligands affect the efficiency of the reaction?

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

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How does the temperature affect the orientational order parameter of a liquid crystal using Monte Carlo simulations?

asked Feb 28 in Computational Chemistry by TheScientist (138k points)

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What is the synthesis pathway for the heterocyclic compound pyrrole, and what reagents and conditions are required for this reaction to occur?

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

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How does the type and size of microplastics affect the toxicity of the particles to marine organisms?

asked Feb 28 in Environmental Chemistry by TheScientist (138k points)

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What common trends can be observed in the periodic table of elements and how can they be used to predict the chemical properties of various elements?

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

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