Hot questions

0 votes

1 answer 75 views

What is the pH of a 0.1 M hydrochloric acid solution when measured with a pH meter at 25°C?

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

0 votes

1 answer 85 views

What are the factors affecting the rate of crystallization of polymers and how does each factor affect the overall morphology of the polymer crystal structure?

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

0 votes

1 answer 76 views

What is the heat released or absorbed when 2 moles of hydrogen gas reacts with 1 mole of oxygen gas to form 2 moles of water vapor at constant volume? The enthalpy change for this reaction is -483.7 kJ/mol.

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

0 votes

1 answer 87 views

How can the yield of the synthesis of nylon-6,6 from adipic acid and hexamethylenediamine be improved by modifying the reaction parameters and what impact does the modification have on the properties of the resulting polymer?

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

0 votes

1 answer 93 views

How does the temperature affect the order parameter and phase transition of the nematic phase of a liquid crystal system using Monte Carlo simulations?

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

0 votes

1 answer 80 views

What is the corrosion current density of a silver electrode in a 0.5M aqueous solution of NaCl at 25°C, given its polarization resistance of 125 Ω and an area of 20 cm²?

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

0 votes

1 answer 77 views

What is the formal charge on the nitrogen atom in the compound ammonium chloride (NH4Cl)? Show your work in calculating the formal charge.

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

0 votes

1 answer 87 views

What is the yield of benzocaine obtained from the synthesis reaction of p-aminobenzoic acid and ethanol, and how does the yield vary with changes in the reaction conditions such as temperature, solvent, and reactant ratios?

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

0 votes

1 answer 84 views

What modifications can be made to the chemical structure of polymer-based adhesives and sealants to improve their adhesion and moisture resistance properties?

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

0 votes

1 answer 85 views

What are the factors that affect the phosphorescence emission of materials in photochemistry?

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

0 votes

1 answer 89 views

How can the use of nanoparticles in drug delivery systems be optimized to improve its efficacy in treating cancer?

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

0 votes

1 answer 76 views

What is the heat of sublimation for solid carbon dioxide (dry ice) if 100 grams of it sublimes at a constant pressure of 1 atm and absorbs 25.2 kJ of heat?

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

0 votes

1 answer 78 views

What is the enthalpy change when 10 g of sodium hydroxide (NaOH) is dissolved in 100 mL of water? The molar enthalpy of solution for NaOH is -44.5 kJ/mol.

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

0 votes

1 answer 79 views

What is the enthalpy change (∆H) for the combustion of 5.00 grams of propane (C3H8) given the following balanced chemical equation: C3H8(g) + 5O2(g) → 3CO2(g) + 4H2O(g) and the heat of formation values for each compound involved?

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

0 votes

1 answer 81 views

What is the amount of energy required to vaporize 50 grams of water at its normal boiling point? The enthalpy of vaporization of water is 40.7 kJ/mol.

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

0 votes

1 answer 79 views

What is the electrical conductivity (in S/cm) of a 0.1 M solution of potassium chloride (KCl) at 25 degrees Celsius?

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

0 votes

1 answer 78 views

What is the enthalpy change of hydrolysis for 10 grams of sucrose (C12H22O11) dissolved in 100 mL of water at 25°C? Given that the enthalpy of hydrolysis for sucrose is -564.8 kJ/mol.

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

0 votes

1 answer 80 views

What is the change in enthalpy and entropy for the reaction of 2 moles of hydrogen gas (H2) and 1 mole of oxygen gas (O2) to form 2 moles of water (H2O) at standard conditions?

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

0 votes

1 answer 88 views

How does the variation of concentration of a reactant affect the reaction rate and ultimately the profitability of the reaction in the synthesis of a specific product?

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

0 votes

1 answer 86 views

What is the zeta potential of colloidal silver nanoparticles in aqueous solution at pH 7 and how does it vary with ionic strength?

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

Categories