Questions by MagdaMeares

0 votes

1 answer 26 views

What is the most effective UV filter substance in commercially available sunscreens, and what is its mechanism of action in protecting the skin from harmful UV radiation?

asked 3 days ago in PhotoChemistry

0 votes

1 answer 21 views

What is the effect of different solvents on the photochemical properties (fluorescence and excitation spectra) of a fluorescent dye?

asked 5 days ago in PhotoChemistry

0 votes

1 answer 25 views

What is the balanced chemical equation for the double replacement reaction between barium chloride (BaCl2) and potassium sulfate (K2SO4)?

asked Feb 17 in Chemical reactions

0 votes

1 answer 32 views

How does temperature affect the phase transition of water from liquid to vapor as determined by Monte Carlo simulations?

asked Feb 17 in Computational Chemistry

0 votes

1 answer 22 views

How does the chemical and physical nature of a metal substrate affect the enhancement factor in SERS measurements?

asked Feb 17 in Surface Chemistry

0 votes

1 answer 8 views

How can we design drugs to specifically target and inhibit the growth of gram-negative bacteria, such as E. coli, without affecting the beneficial bacteria in the microbiome?

asked Feb 12 in Medicinal Chemistry

0 votes

1 answer 45 views

How can the surface properties and performance of biomaterials be modified using chemical techniques while retaining their biocompatibility and functionality?

asked Feb 11 in Surface Chemistry

0 votes

1 answer 28 views

How can the properties of semiconductors be optimized for use in electronic devices such as solar cells and transistors?

asked Feb 10 in Materials Chemistry

0 votes

1 answer 31 views

How can the conductivity of a polymer-based electronic material be increased without compromising its mechanical properties?

asked Feb 6 in Polymer Chemistry

0 votes

1 answer 31 views

How can chemistry students be educated about the importance of safety protocols in the laboratory to reduce the number of accidents caused by insufficient emphasis on safety?

asked Feb 4 in Chemical education

0 votes

1 answer 53 views

Design a multi-step synthesis of 2-phenylbutanoic acid starting from benzene and any other necessary reagents, using retrosynthesis to plan the reaction steps. Include reaction mechanisms, reagents, and conditions for each step.

asked Feb 4 in Organic Chemistry

0 votes

1 answer 43 views

Design a distillation column to separate a mixture of cyclohexane and toluene with a feed composition of 60 mol% cyclohexane and 40 mol% toluene. The distillate product should contain a minimum of 90 mol% cyclohexane and the bottom product should contain a maximum of 10 mol% cyclohexane. You have access to a temperature range of 80-150°C and a pressure range of 1-5 atm. Determine the number of theoretical plates required for this separation and the corresponding reflux ratio.

asked Feb 4 in Chemical engineering

0 votes

1 answer 55 views

Calculate the standard enthalpy change for the following reaction: 2H2(g) + O2(g) → 2H2O(l)Given the standard enthalpies of formation for H2O (l), H2 (g) and O2 (g) are -285.8 kJ/mol, 0 kJ/mol and 0 kJ/mol, respectively.

asked Feb 3 in Chemical thermodynamics

0 votes

1 answer 69 views

How does changing the geometry and size of a molecule affect its electronic excited states and optical properties, and how can this information be accurately calculated using quantum chemistry methods?

asked Feb 3 in Quantum Chemistry

0 votes

1 answer 73 views

What is the potential of a natural plant compound to act as an effective cancer treatment? Provide experimental evidence to support your findings, including the mechanism of action and toxicity profile of the compound.

asked Jan 31 in Medicinal Chemistry

0 votes

1 answer 76 views

Calculate the corrosion potential of a zinc-copper galvanic couple in which the zinc electrode has a concentration of 0.1 M and the copper electrode has a concentration of 0.01 M. The standard reduction potentials for Zn2+/Zn and Cu2+/Cu are -0.76 V and +0.34 V, respectively.

asked Jan 23 in ElectroChemistry

0 votes

1 answer 57 views

Who developed the Student's t-test?

asked Jan 20 in Psychology

0 votes

1 answer 36 views

What is the theory of post-traumatic stress growth?

asked Jan 20 in Psychology

0 votes

1 answer 53 views

What were the ethical concerns regarding Zimbardo's prison experiment?

asked Jan 20 in Psychology

0 votes

1 answer 47 views

Please compare the concept of 'ego ideal' in Erikson's theory versus that of 'self-actualization' in Abraham Maslow's theory.

asked Jan 17 in Psychology

Categories