Recent activity by ElkeMary0923

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What is the resonance hybrid structure of benzene? Show how the pi electrons are distributed throughout the molecule and explain why it is unusually stable compared to other unsaturated compounds.

answered 1 day ago in Organic Chemistry

1 answer 22 views

What factors affect the rate of the reaction between sodium thiosulfate and hydrochloric acid, and how do these factors affect the rate?

answered 3 days ago in Inorganic Chemistry

1 answer 23 views

What is the optimal ratio of diisocyanate and polyol for synthesizing polyurethane with the highest possible mechanical strength?

answered 4 days ago in Chemical synthesis

1 answer 30 views

What is the most efficient and cost-effective method to produce industrial gases such as nitrogen, oxygen, and hydrogen on a large scale using chemical engineering principles? And how can the purity of each gas be ensured during the production process?

answered 4 days ago in Chemical engineering

1 answer 24 views

What is the mechanism by which chlorofluorocarbons (CFCs) cause depletion of the ozone layer? And how does the concentration of CFCs affect the rate of ozone depletion? Provide scientific evidence for your answer.

asked 5 days ago in Environmental Chemistry

1 answer 23 views

How does the concentration of pollutants in water affect the survival and reproduction of a local fish species?

answered Feb 19 in Environmental Chemistry

1 answer 28 views

How does the addition of different functional groups affect the electronic transport properties of a specific organic compound as predicted by density functional theory calculations?

asked Feb 17 in Computational Chemistry

1 answer 26 views

How does the activity of a catalyst influence the reaction rate of the decomposition of hydrogen peroxide?

answered Feb 17 in Chemical kinetics

1 answer 33 views

How can we safely dispose of radioactive waste without harming the environment and human health?

asked Feb 14 in Environmental Chemistry

1 answer 29 views

How does quantum mechanics explain the molecular geometry and bond angles of methane (CH4)?

asked Feb 14 in Physical Chemistry

1 answer 20 views

What is the difference between primary, secondary, and tertiary amines in terms of their synthesis and properties? Provide examples of each and explain their reactivity with electrophiles.

answered Feb 14 in Organic Chemistry

1 answer 37 views

How can the use of prodrugs be optimized in the development of novel treatments for gastrointestinal diseases?

asked Feb 14 in Medicinal Chemistry

1 answer 10 views

How can we design a drug that targets and inhibits the replication of the Zika virus, while not affecting healthy human cells?

asked Feb 12 in Medicinal Chemistry

1 answer 55 views

How can the properties of graphene be modified to improve its suitability for electronic device applications, such as improving its conductivity or stability? Specifically, what chemical modifications, if any, can be made to the graphene structure to enhance its performance in electronic devices? How do these modifications affect the overall properties of graphene and its potential use in various electronic applications?

asked Feb 10 in Materials Chemistry

1 answer 9 views

How can the properties of ceramics be tailored to improve their performance in high-temperature applications, such as in gas turbine engines?

answered Feb 10 in Materials Chemistry

1 answer 33 views

How can the manufacturing process for a specific polymer be optimized to improve its strength and durability without compromising its other properties?

asked Feb 7 in Polymer Chemistry

1 answer 45 views

Determine the formal charge of the central atom in SF6. Show all your work and explain how you arrived at your answer.

answered Feb 4 in Inorganic Chemistry

1 answer 40 views

Calculate the standard enthalpy of formation (∆Hf) of water (H2O) given the following information: 2H2(g) + O2(g) → 2H2O(l); ∆H = -572 kJ/mol and the standard enthalpy of formation of O2 is 0 kJ/mol.

asked Feb 3 in ThermoChemistry

1 answer 51 views

Calculate the standard enthalpy change (∆H°) for the combustion of methane (CH4(g)) given the balanced equation: CH4(g) + 2O2(g) → CO2(g) + 2H2O(l)(Note: The values of standard enthalpies of formation of CO2(g), H2O(l) and CH4(g) are -393.5 kJ/mol, -285.8 kJ/mol, and -74.8 kJ/mol, respectively)

asked Feb 3 in Chemical thermodynamics

1 answer 47 views

What is the effect of changing the concentration of reactants on the rate of a chemical reaction and how does it impact the sustainability of the reaction?

answered Feb 3 in Chemical kinetics

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