Recent activity by MaynardErb58

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What is the relationship between surface tension and temperature as measured by the pendant drop method?

asked Feb 24 in Surface Chemistry

1 answer 25 views

How does the metabolic pathway of glucose differ between a normal cell and a cancerous cell, and what potential targets can be identified for cancer treatment based on this difference?

asked Feb 20 in BioChemistry

1 answer 33 views

How does the geometry and electronic structure of transition metal complexes affect their catalytic activity in organic synthesis, as studied through ab initio calculations?

answered Feb 20 in Computational Chemistry

1 answer 25 views

What is the coordination number of the Eu(III) ion in the complex [Eu(NO3)3(H2O)9]? Explain the factors that determine the coordination number of lanthanide ions in coordination complexes.

asked Feb 19 in Coordination Chemistry

1 answer 31 views

How does the coordination chemistry of metalloenzymes and metalloproteins affect their activity and function?

answered Feb 19 in Coordination Chemistry

1 answer 32 views

What is the relationship between the acidity of carboxylic acids and structure of the acid derivatives?

answered Feb 17 in Organic Chemistry

1 answer 80 views

What is the best protecting group strategy for selectively blocking one of the two free hydroxyl (-OH) groups in a molecule when both groups are reactive and need to be preserved for further reactions in an organic synthesis?

answered Feb 13 in Organic Chemistry

1 answer 54 views

What will happen to the equilibrium of the reaction N2(g) + 3H2(g) ⇌ 2NH3(g) if the pressure is increased?

asked Feb 13 in Chemical equilibrium

1 answer 41 views

How can the mechanical properties (tensile strength, fracture toughness, etc.) of polymer-based composites for aerospace applications be improved without compromising their lightweight characteristic?

asked Feb 10 in Polymer Chemistry

1 answer 39 views

How can the mechanical and chemical properties of biomaterials be optimized for use in tissue engineering applications?

answered Feb 7 in Materials Chemistry

1 answer 68 views

Can the chemical modification of a polymer affect its optical properties and if so, how can we design a polymer with unique optical properties for use in advanced optical materials?

answered Feb 3 in Polymer Chemistry

1 answer 75 views

Calculating the standard enthalpy change for the vaporization of water is a common example used in chemistry. Suppose that you have 50.0 g of liquid water at 25°C and 1 atm pressure. What is the standard enthalpy change for the vaporization of this amount of water at its boiling point, which is 100°C and 1 atm pressure?

answered Feb 3 in Chemical thermodynamics

1 answer 67 views

Calculate the standard enthalpy change for the precipitation reaction that occurs when 100 mL of 0.2 M lead nitrate solution reacts with 100 mL of 0.1 M sodium iodide solution to form solid lead iodide and aqueous sodium nitrate. The balanced chemical equation for the reaction is:Pb(NO3)2(aq) + 2 NaI(aq) → PbI2(s) + 2 NaNO3(aq)Given: - Molar mass of Pb(NO3)2 = 331.20 g/mol - Molar mass of NaI = 149.89 g/mol - Density of 0.2 M lead nitrate solution = 1.055 g/mL - Density of 0.1 M sodium iodide solution = 1.04 g/mL - Specific heat capacity of the reaction mixture is 4.18 J/(g · °C) - The initial temperature of the reaction mixture and the surroundings is 25 °C.

asked Feb 3 in Chemical thermodynamics

1 answer 125 views

Calculate the standard enthalpy change for the following reaction: [CoCl(NH3)5]2+ (aq) + 4H2O (l) → [Co(H2O)6]2+ (aq) + 2Cl- (aq) + 5NH3 (g)Given that the standard enthalpy of formation of [Co(H2O)6]2+ (aq) is -1518.5 kJ/mol, [CoCl(NH3)5]2+ (aq) is -426.9 kJ/mol, and the enthalpy of vaporization of water is 44.0 kJ/mol.

answered Feb 3 in Chemical thermodynamics

1 answer 104 views

How does changing the ratio of reactants in a chemical reaction affect the rate of the reaction?

answered Feb 3 in Chemical kinetics

1 answer 104 views

How does changing the concentration of reactants affect the rate of reaction and impact the overall profitability of the chemical reaction?

answered Feb 3 in Chemical kinetics

1 answer 75 views

What is the structure of the metal centre in the active site of the metalloenzyme carbonic anhydrase and how does this structure contribute to its function in catalysing the hydration of carbon dioxide?

answered Jan 31 in Coordination Chemistry

1 answer 96 views

How do carbohydrate-protein interactions influence the recognition and binding of enzymes to their substrates, and what are the implications of this recognition and binding for biochemical reactions?

asked Jan 31 in BioChemistry

1 answer 129 views

What is the probability of a gas-phase reaction between methane and chlorine producing methyl chloride at a temperature of 500 K using Monte Carlo simulations?

asked Jan 31 in Computational Chemistry

1 answer 115 views

What steps can a chemistry student take to access limited chemistry textbooks and resources for self-study without access to a physical library or bookstore?

asked Jan 30 in Chemical education

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