Recent activity by BettyWalsh4

1 answer 27 views

How has the historical development of chemistry impacted our understanding of modern chemical concepts and theories, and why is it important to emphasize this evolution in chemistry education?

asked 5 days ago in Chemical education

1 answer 24 views

How do the functional groups present in biomolecules like proteins and nucleic acids dictate their unique properties and functions in living systems?

asked 5 days ago in Organic Chemistry

1 answer 23 views

How does the energy of the excited state dynamics of a molecule change as a function of its molecular geometry, and how can ab initio calculations be utilized to predict this behavior?

answered 6 days ago in Computational Chemistry

1 answer 31 views

How does the concentration and size of microplastics directly affect the toxicity and bioaccumulation potential in marine organisms like plankton and fish in a given area?

answered Feb 18 in Environmental Chemistry

1 answer 32 views

What is the bond strength of the molecule H2O? Is it stronger or weaker than the bond strength of CO2? Justify your answer with the relevant theories and experimental data.

answered Feb 18 in Chemical bonding

1 answer 28 views

What is the balanced chemical equation for the combustion of ethane (C2H6) in the presence of oxygen (O2) to produce carbon dioxide (CO2) and water (H2O)?

answered Feb 17 in Chemical reactions

1 answer 25 views

What is the effect of the addition of dopants to the superconducting material YBa2Cu3O7 on its critical temperature?

asked Feb 17 in Materials Chemistry

1 answer 38 views

What is the role of metal ions in the catalytic activity of metalloenzymes and metalloproteins? Provide examples of metalloenzymes and metalloproteins and their specific metal ion cofactors that are important in their biochemical functions.

asked Feb 13 in Coordination Chemistry

1 answer 47 views

What is the coordination number of the complex [CoCl4]2- according to crystal field theory and what is the oxidation state of cobalt in this complex?

asked Feb 13 in Coordination Chemistry

1 answer 35 views

How can we use chemistry concepts and principles to explain the process of food spoilage and prevent it from happening in our daily lives?

answered Feb 13 in Chemical education

1 answer 9 views

How can we design a system for the production of natural vanilla flavor using chemical engineering principles and techniques?

answered Feb 12 in Chemical engineering

1 answer 9 views

How can the properties of metal alloys be optimized for use in aerospace applications, taking into consideration factors such as strength, durability, and weight?

answered Feb 10 in Materials Chemistry

1 answer 30 views

How can the critical temperature of superconducting materials be optimized to increase their efficiency in energy transfer applications?

asked Feb 6 in Materials Chemistry

1 answer 36 views

How can the Catalytic polymerization of propylene monomer be optimized in order to produce high-quality polypropylene with desirable properties such as stiffness, impact resistance, and transparency?

asked Feb 6 in Chemical synthesis

1 answer 69 views

How do changes in the phosphorylation state of proteins within a cell’s signal transduction pathway affect the activation of downstream enzymes and ultimate cellular response? Provide examples of specific signal transduction pathways and how modulating these phosphorylation events can impact cellular behavior.

asked Jan 31 in BioChemistry

1 answer 83 views

What is the difference between an aldehyde and a ketone? Give three examples of each and explain what makes them different from each other in terms of chemical structure and reactivity. Additionally, provide a brief explanation of common methods for synthesizing both aldehydes and ketones.

answered Jan 31 in Organic Chemistry

1 answer 59 views

Calculate the enthalpy change for the hydrolysis of 2 moles of sucrose (C12H22O11) into glucose (C6H12O6) and fructose (C6H12O6) given the following information:- Enthalpy of formation of glucose = -1273 kJ/mol- Enthalpy of formation of fructose = -1260 kJ/mol- Enthalpy of formation of sucrose = -2226 kJ/mol

answered Jan 23 in ThermoChemistry

1 answer 56 views

Calculate the bond energy required to break all the C-H bonds in a mole of methane (CH4) gas.

answered Jan 23 in Chemical reactions

1 answer 48 views

A sealed vessel contains a mixture of nitrogen dioxide and dinitrogen tetraoxide gases in equilibrium. If the volume of the container is increased, would the equilibrium shift towards more or less NO2? Calculate the new equilibrium constant at the new volume assuming the pressure and temperature remain constant.

answered Jan 22 in Chemical equilibrium

1 answer 25 views

What is the most widely used IQ test?

asked Jan 20 in Psychology

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