Recent activity by HildredU3922

1 answer 15 views

What is the optimal ratio of toluene to nitric acid to obtain the highest yield of 2,4,6-trinitrotoluene during the preparation process?

asked 3 days ago in Chemical synthesis

1 answer 23 views

How does the intensity of light affect the rate of a chemical reaction involving the decomposition of hydrogen peroxide?

answered 5 days ago in Chemical kinetics

1 answer 20 views

What is the balanced equation for the single replacement reaction between magnesium (Mg) and hydrochloric acid (HCl), and what are the products of the reaction?

answered Feb 17 in Chemical reactions

1 answer 36 views

What factors determine the acidity or basicity of a molecule? Provide specific examples of molecules to illustrate your answer.

asked Feb 17 in Chemical bonding

1 answer 30 views

What are the chemical compounds present in air pollutants that have the greatest impact on human health, and how can we effectively monitor and control their concentrations to reduce the risk of long-term adverse health effects?

answered Feb 14 in Environmental Chemistry

1 answer 31 views

How do the photochemical properties of quantum dots vary with changes in their size, shape, and composition?

answered Feb 14 in PhotoChemistry

1 answer 32 views

How can we use quantum chemistry methods to predict the catalytic activity and selectivity of a specific reaction?

answered Feb 14 in Quantum Chemistry

1 answer 37 views

Using the Lewis structure of a molecule, how many valence electrons are involved in the chemical bonding of carbon dioxide (CO2)?

asked Feb 13 in Chemical bonding

1 answer 39 views

What is the hybridization of the carbon atoms in ethene (C2H4) and how does it affect the molecule's geometry and bond angles?

asked Feb 13 in Chemical bonding

1 answer 50 views

What type of bond forms between two carbon atoms in a molecule of ethane (C2H6)?

asked Feb 13 in Chemical bonding

1 answer 50 views

How can inadequate training for chemistry teachers affect students' learning outcomes and their interest in pursuing further education or careers in chemistry-related fields?

answered Feb 5 in Chemical education

1 answer 45 views

Determine the activation energy for the electrochemical reaction between zinc and copper (II) sulfate solution, given that the rate constant is 2.8 x 10^-3 s^-1 at 298 K and 8.7 x 10^-3 s^-1 at 308 K.

answered Feb 4 in ElectroChemistry

1 answer 54 views

Calculate the standard electrode potential for the following cell: Mg (s) | Mg2+ (aq, 0.10 M) || Ag+ (aq, 1.0 M) | Ag (s) Given: E°(Ag+/Ag) = +0.80 V E°(Mg2+/Mg) = -2.37 V

answered Feb 3 in ElectroChemistry

1 answer 35 views

Calculate the rate of electroplating of copper on a metallic surface at a current of 2.5 amperes for a duration of 3 hours using a copper nitrate solution with a concentration of 0.2 M. Given that the standard potential of the reduction reaction of Cu2+ to Cu is +0.34 V and the charge of one mole of electrons is 96500 C/mol.

answered Feb 3 in ElectroChemistry

1 answer 51 views

How can UV-Vis spectroscopy be used to identify the presence of specific functional groups in a compound, such as aldehydes or ketones? What are the characteristic absorbance wavelengths for these functional groups, and how can their presence be confirmed through spectral analysis?

answered Jan 29 in Analytical Chemistry

1 answer 52 views

Calculate the enthalpy of adsorption when 2.0 grams of activated charcoal adsorbs 25 mL of methane gas at a constant temperature of 298 K, given that the pressure is 1 atm. Assume ideal gas behavior for methane.

answered Jan 23 in ThermoChemistry

1 answer 59 views

A student needs to calculate the enthalpy change for a chemical reaction given the enthalpies of formation of the reactants and products. The specific problem is: Calculate the enthalpy change for the reaction:CH4(g) + 2O2(g) → CO2(g) + 2H2O(l)Given the following enthalpies of formation:ΔHf(CH4) = -74.8 kJ/molΔHf(CO2) = -393.5 kJ/molΔHf(H2O) = -285.8 kJ/mol

answered Jan 22 in Chemical reactions

1 answer 43 views

Where did the idea of mindfulness-based interventions originate?

asked Jan 20 in Psychology

1 answer 51 views

What is splitting and how does it relate to borderline personality disorder?

answered Jan 20 in Psychology

1 answer 39 views

What is Pearson's correlation coefficient?

answered Jan 20 in Psychology

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