Hot questions

0 votes

1 answer 93 views

How can we modify the synthesis technique for carbon nanotubes to increase their purity and homogeneity?

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

0 votes

1 answer 79 views

What is the vibrational frequency of HCl molecule in its ground state?

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

0 votes

1 answer 97 views

How does the urea cycle contribute to the disposal of excess nitrogen in the body during amino acid metabolism, and what are the key enzymes involved in this process?

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

0 votes

1 answer 87 views

What is the corrosion current density of iron in a 0.1 M hydrochloric acid solution at 25 °C, if the corrosion potential of the metal is -0.44 V vs. the standard hydrogen electrode and the Tafel slope is 120 mV/decade of current density?

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

0 votes

1 answer 90 views

How can we increase the presence of chemistry in our daily lives to promote better understanding and appreciation for the subject?

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

0 votes

1 answer 86 views

What is the enthalpy change for the hydrolysis of one mole of sucrose (C12H22O11) to glucose (C6H12O6) and fructose (C6H12O6), given the standard enthalpies of formation for sucrose, glucose, and fructose?

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

0 votes

1 answer 87 views

What is the change in equilibrium constant for the formation of a complex ion when the temperature is increased from 25°C to 50°C, given that the enthalpy of reaction is -20 kJ/mol and the entropy change is 80 J/(mol·K)?

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

0 votes

1 answer 87 views

What is the change in entropy when 2 moles of H2 (g) react with 1 mole of O2 (g) to form 2 moles of H2O (l) at a constant temperature of 298 K? (Assume standard molar entropy values for the reactants and products)

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

0 votes

1 answer 85 views

What is the enthalpy change of the dissolution of 5.00 g of sodium chloride in 100.0 mL of water at 25°C, given that the final temperature of the solution is 28.6°C and the heat capacity of the solution is 4.18 J/g°C?

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

0 votes

1 answer 85 views

What is the enthalpy change of precipitation when 50 mL of 0.1 M BaCl2 is mixed with 25 mL of 0.2 M Na2SO4, given that ΔH˚f of BaSO4 is -1464 kJ/mol?

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

0 votes

1 answer 79 views

What is the theoretical yield of aspirin that can be produced from a mixture of 2.0 grams of salicylic acid and 5.0 mL of acetic anhydride?

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

0 votes

1 answer 83 views

What is the heat of formation (in kJ/mol) of methane (CH4) from its elements carbon (C) and hydrogen (H2) at standard conditions (25°C and 1 atm)? Use the following data for the bond energies: C-H = 414 kJ/mol, H-H = 436 kJ/mol, and C-C = 348 kJ/mol.

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

0 votes

1 answer 83 views

What is the heat of formation of methane (CH4) at standard conditions (25°C and 1 atm pressure) using the bond energy method?

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

0 votes

1 answer 79 views

What is the theoretical yield of acetylsalicylic acid that can be obtained if 5 grams of acetic anhydride and 3 grams of salicylic acid are reacted to synthesize acetylsalicylic acid, assuming complete conversion and 100% efficiency?

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

0 votes

1 answer 86 views

What is the efficiency of an electrochemical cell with a standard potential of 1.5V when the measured potential is 1.2V and the current passing through the cell is 0.5A for 2 hours? (Assume the cell is operating under standard conditions.)

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

0 votes

1 answer 84 views

What would be the expected yield of nylon-6,6 if 5 grams of adipic acid were reacted with excess hexamethylenediamine in a 1:1 molar ratio reaction?

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

0 votes

1 answer 81 views

What is the rate of diffusion of helium gas (He) in air at 25°C and a pressure of 1 atm?

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

0 votes

1 answer 81 views

What is the probability of finding a system composed of two ideal gas particles in a given volume, temperature and energy range? Use statistical mechanics and the canonical ensemble to calculate the probability and explain your results.

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

0 votes

1 answer 87 views

Using the molecular orbital theory, calculate the bond order and predict the magnetic behavior of carbon monoxide (CO) according to its electronic structure.

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

0 votes

1 answer 84 views

What is the exchange current density for a copper electrode in contact with a 1M solution of CuSO4 at a temperature of 25°C if the electrode potential is measured to be 0.25 V versus the standard hydrogen electrode?

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

Categories