Recent activity by JulianaKane

1 answer 27 views

What is the relationship between the structure of a luminescent material and its photochemical properties?

asked Feb 24 in PhotoChemistry

1 answer 27 views

What is the electronegativity difference between chlorine and sodium in a sodium chloride (NaCl) molecule?

1 answer 30 views

What is the effect of temperature on the surface tension of water and how can it be measured accurately using the capillary rise method?

answered Feb 20 in Surface Chemistry

1 answer 28 views

What is the bond enthalpy of the carbon-hydrogen bond in methane (CH4)? Provide calculations to support your answer.

asked Feb 18 in Chemical bonding

1 answer 32 views

What is the boiling point of a substance with dipole-dipole interactions, compared to a substance with only London dispersion forces? Provide an explanation for the difference observed.

asked Feb 17 in Chemical bonding

1 answer 34 views

How does the absorption of light by organic compounds lead to the formation of excited states, and what are the subsequent steps involved in the photochemical reactions of these compounds?

answered Feb 17 in PhotoChemistry

1 answer 32 views

How does quantum coherence and entanglement affect the electronic and magnetic properties of a specific molecular or nanoscale system, and what experimental techniques can be used to measure these properties?

answered Feb 14 in Quantum Chemistry

1 answer 46 views

What hybrid orbitals are present in the molecule CH4, and what is the bond angle between each of the hydrogen atoms?

asked Feb 13 in Chemical bonding

1 answer 87 views

How does changing the pH affect the equilibrium position of a redox reaction between iron (II) and dichromate ions in acidic and basic solutions? Provide a balanced chemical equation and explain your reasoning using Le Chatelier's principle.

asked Feb 13 in Chemical equilibrium

1 answer 144 views

How does eutrophication lead to the formation of harmful algal blooms, and what chemical compounds are responsible for their toxic effects on aquatic organisms?

answered Feb 13 in Environmental Chemistry

1 answer 69 views

How do Chlorofluorocarbons (CFCs) specifically degrade the ozone layer and what chemical reactions occur in the process?

asked Feb 12 in Environmental Chemistry

1 answer 28 views

How can the efficiency and cost-effectiveness of a system designed for the production of hydrogen fuel using renewable energy sources be improved while minimizing environmental impact?

answered Feb 7 in Chemical engineering

1 answer 45 views

How can the chemical engineer optimize the production process of a specific food additive while ensuring its purity and safety for human consumption?

asked Feb 6 in Chemical engineering

1 answer 59 views

How can the adsorption capacity of zeolites be optimized for specific industrial applications using computational studies?

asked Feb 6 in Computational Chemistry

1 answer 39 views

How can the activity of a catalyst be optimized for a specific reaction?

asked Feb 6 in Physical Chemistry

1 answer 53 views

Calculate the standard enthalpy of formation of ammonia gas (NH3) using the following information:- Standard enthalpy of formation for nitrogen gas (N2) = 0 kJ/mol- Standard enthalpy of formation for hydrogen gas (H2) = 0 kJ/mol- Standard enthalpy of formation for ammonia gas (NH3) = -46 kJ/mol

asked Feb 3 in Chemical thermodynamics

1 answer 66 views

Calculate the standard enthalpy change for the following chemical reaction involving solutions:2HNO3(aq) + Ba(OH)2(aq) → Ba(NO3)2(aq) + 2H2O(l)Given the following information:ΔHf° [HNO3(aq)] = -207.5 kJ/molΔHf° [Ba(OH)2(aq)] = -994.0 kJ/molΔHf° [Ba(NO3)2(aq)] = -537.5 kJ/mol

answered Feb 3 in Chemical thermodynamics

1 answer 77 views

Calculate the reaction quotient, Q, for the following balanced chemical reaction at 298 K:2NO(g) + O2(g) ⇌ 2NO2(g)Given that the initial concentrations of NO, O2 and NO2 are 0.10 M, 0.15 M and 0.05 M, respectively.

answered Feb 3 in Chemical thermodynamics

1 answer 162 views

What strategies can a chemistry student use to adequately prepare for chemistry-related careers, and how can they ensure they are gaining the necessary skills and knowledge to be successful in their chosen profession?

answered Jan 30 in Chemical education

1 answer 117 views

What specific study strategies can a chemistry student implement to better prepare for exams and improve their performance in the subject?

asked Jan 30 in Chemical education

Categories