Hot questions

0 votes

1 answer 102 views

How does the size and shape of nanoparticles affect their catalytic activity in chemical reactions?

asked Feb 25 in Materials Chemistry by TheScientist (138k points)

0 votes

1 answer 94 views

How does the strength of an applied magnetic field affect the magnetic properties of materials commonly used in data storage, such as iron oxide and cobalt?

asked Feb 25 in Materials Chemistry by TheScientist (138k points)

0 votes

1 answer 142 views

How do the size and shape of metallic nanoparticles affect their catalytic activity in the conversion of carbon dioxide to carbon monoxide?

asked Feb 24 in Materials Chemistry by LucilleWhite (2.3k points)

0 votes

1 answer 94 views

What is the standard enthalpy of formation of water (H2O) at 25°C and 1 atm pressure, given the heat of formation of hydrogen gas (H2) is +68.32 kJ/mol and the heat of formation of oxygen gas (O2) is zero?

asked Feb 25 in Chemical thermodynamics by TheScientist (138k points)

0 votes

1 answer 98 views

What is the solubility of Calcium chloride (CaCl2) in water (H2O) at a temperature of 25°C? Provide the calculations used to determine the solubility.

asked Feb 25 in Chemical bonding by TheScientist (138k points)

0 votes

1 answer 102 views

What is the effect of varying the size and shape of gold nanoparticles on their catalytic activity in the reduction of 4-nitrophenol, and how does this compare to other common catalysts such as silver or palladium nanoparticles?

asked Feb 25 in Materials Chemistry by TheScientist (138k points)

0 votes

1 answer 92 views

What are the strongest intermolecular forces present in a sample of water?

asked Feb 25 in Chemical bonding by TheScientist (138k points)

0 votes

1 answer 100 views

What is the effect of nanoparticle size and shape on its photochemical properties? Please provide examples and discuss the underlying mechanisms behind these observations.

asked Feb 25 in PhotoChemistry by TheScientist (138k points)

0 votes

1 answer 92 views

What is the step-by-step procedure for preparing 2,4-dinitrophenol from phenol and nitric acid, and what are the properties and uses of 2,4-dinitrophenol in chemistry and industry?

asked Feb 25 in Chemical synthesis by TheScientist (138k points)

0 votes

1 answer 92 views

What is the standard enthalpy change of neutralization for the reaction between hydrochloric acid and sodium hydroxide, given that the heat of reaction for the neutralization of 1 mole of HCl and 1 mole of NaOH is -57.1 kJ?

asked Feb 25 in Chemical thermodynamics by TheScientist (138k points)

0 votes

1 answer 100 views

How does the size and shape of metal ions affect the stability and selectivity of metal-organic frameworks?

asked Feb 25 in Computational Chemistry by TheScientist (138k points)

0 votes

1 answer 92 views

What is the standard enthalpy change for the neutralization reaction of hydrochloric acid (HCl) and sodium hydroxide (NaOH) at 25°C and 1 atm pressure? The balanced equation for the reaction is: HCl (aq) + NaOH (aq) → NaCl (aq) + H2O (l)

asked Feb 25 in Chemical thermodynamics by TheScientist (138k points)

0 votes

1 answer 92 views

What is the standard enthalpy change for the fusion of 1 mole of ice at 0°C and 1 atm pressure to liquid water at 0°C and 1 atm pressure? Given that the standard enthalpy of fusion of ice is 6.01 kJ/mol.

asked Feb 25 in Chemical thermodynamics by TheScientist (138k points)

0 votes

1 answer 95 views

What is the solubility of 10 grams of NaCl in 100 mL of water at 25°C?

asked Feb 25 in Chemical bonding by TheScientist (138k points)

0 votes

1 answer 91 views

What is the standard enthalpy change for the sublimation of iodine (I2) given that the standard enthalpy change of formation of iodine molecules is -62.4 kJ/mol and the enthalpy of vaporization of iodine is 41.7 kJ/mol?

asked Feb 25 in Chemical thermodynamics by TheScientist (138k points)

0 votes

1 answer 95 views

What factors determine the solubility of a substance in a specific solvent and how can they be quantitatively measured?

asked Feb 25 in Chemical bonding by TheScientist (138k points)

0 votes

1 answer 93 views

What is the heat capacity of 25 grams of water at 25°C if it takes 4184 J of heat to raise its temperature by 1°C?

asked Feb 25 in Chemical thermodynamics by TheScientist (138k points)

+1 vote

1 answer 87 views

How does the size and shape of quantum dots and quantum wells affect their electronic and optical properties, and how can these properties be calculated using quantum chemistry methods?

asked Feb 24 in Quantum Chemistry by GudrunBatten (1.8k points)

0 votes

1 answer 97 views

How do the size and shape of quantum dots affect their photochemical properties?

asked Feb 25 in PhotoChemistry by TheScientist (138k points)

0 votes

1 answer 90 views

What is the standard enthalpy change of neutralization for the reaction between hydrochloric acid (HCl) and sodium hydroxide (NaOH)? Assume that the reaction occurs in aqueous solution and that the products are water (H2O) and sodium chloride (NaCl).

asked Feb 25 in Chemical thermodynamics by TheScientist (138k points)

Categories