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What is the theoretical yield of aspirin that can be obtained from the synthesis of 5 grams of salicylic acid using 10 mL of acetic anhydride assuming a 100% yield and purity?

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

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How can the synthesis process of nanoparticles be modified to achieve higher yields and better control of the particle size, shape and structure?

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

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What is the molar mass of Calcium Carbonate (CaCO₃)? Show your calculations.

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

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What is the activation energy in Joules for a chemical reaction that has a rate constant of 2.7 x 10^-3 s^-1 and a temperature of 298 K? The activation energy can be calculated using the Arrhenius equation.

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

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What is the heat of formation of methane (CH4) given the following bond energy values: C=C (838 kJ/mol), C-H (413 kJ/mol) and H-H (436 kJ/mol)?

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

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What is the activation energy of the reaction between hydrochloric acid and zinc, given that the reaction rate constant at 25°C is 3.42 x 10^-3 s^-1 and the temperature coefficient is 1.99?

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

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What is the diffusivity of oxygen gas in air at 25°C and 1 atm pressure? Assume ideal gas behavior and provide your answer in SI units.

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

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What is the activation energy required for the decomposition of hydrogen peroxide to water and oxygen at 25°C, given the rate constant of the reaction is 0.005 s⁻¹?

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

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What are the most common types of chemical reactions and equations used in everyday life, and how can these be used to help us better understand the world around us? Provide specific examples to support your answer.

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

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In determining the molecular geometry and bond angles of a molecule, what is the effect of lone pairs on the bond angles and how can it be predicted using VSEPR theory?

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

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How does the average chain length and chain flexibility affect the thermodynamic behavior of polyethylene using Monte Carlo simulations?

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

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What is the maximum power output of a galvanic cell consisting of a zinc electrode and a copper electrode, with a concentration of 0.1 M Zn2+ and 0.01 M Cu2+? Assume a standard hydrogen electrode (SHE) as the reference electrode and a temperature of 25°C.

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

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How does the Zeta potential of colloidal particles change with pH and ionic strength? Provide a detailed explanation and relevant examples from research studies.

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

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Using molecular orbital theory, calculate the bond order and predict the stability of nitrogen molecule (N2)?

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

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What is the density of sodium chloride (NaCl) at a temperature of 25°C and a pressure of 1 atm? (Given: molar mass of NaCl = 58.44 g/mol, crystal structure of NaCl = face-centered cubic, unit cell edge length = 5.64 Å).

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

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How does the use of chemical fertilizers in sustainable agriculture affect soil health and contribute to environmental pollution?

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

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How can undergraduate chemistry students be provided with more exposure to current research in the field? What strategies can be implemented by universities and educators to bridge the gap between classroom learning and research advancements?

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

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What is the current density in an electrochemical cell where the cell potential is 1.2 V and the concentration of the reduced species is 0.035 M? Given that the electrode area is 5 cm² and the Faraday constant is 96485 C/mol.

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

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What is the crystal field stabilization energy (CFSE) for a tetrahedral complex with ligand field splitting parameter (Δt) of 900 cm⁻¹ if it contains three unpaired electrons?

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

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What is the VSEPR geometry of a molecule of sulfur hexafluoride (SF6)?

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

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