Questions by AlisiaBarwel

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0 answers 22 views

How does the size and shape of graphene nanoparticles affect their electronic and optical properties? And, how can we calculate these properties using quantum chemistry principles?

asked Feb 24 in Quantum Chemistry

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1 answer 27 views

How does the presence of heavy metals in soil affect the growth and nutritional value of crops, and what methods can be used to remediate contaminated soils?

asked Feb 22 in Environmental Chemistry

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1 answer 35 views

How does the concentration of reactants affect the rate and efficiency of a chemical reaction? Provide experimental evidence to support your answer.

asked Feb 19 in Chemical kinetics

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1 answer 50 views

How does the choice of carbon source and growth technique affect the structure, properties, and applications of carbon nanotubes synthesized through chemical vapor deposition (CVD)?

asked Feb 18 in Materials Chemistry

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1 answer 39 views

How do different types of organic fertilizers, such as compost and manure, impact soil health and crop yield in sustainable agriculture practices, and what are the environmental implications of their use?

asked Feb 14 in Environmental Chemistry

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1 answer 100 views

What is the role of chlorofluorocarbons (CFCs) in the process of ozone depletion and how does their chemical structure contribute to their impact on the atmosphere?

asked Feb 12 in Environmental Chemistry

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1 answer 58 views

How can the swelling properties of polymer-based superabsorbent materials be optimized for better performance in applications such as agriculture or disposable hygiene products?

asked Feb 11 in Polymer Chemistry

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1 answer 36 views

How can the properties of semiconductors be tailored to enhance the efficiency and performance of electronic devices, such as solar cells and transistors?

asked Feb 10 in Materials Chemistry

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1 answer 46 views

How can chemistry educators make the subject more engaging and interesting for students to increase their interest in the subject?

asked Feb 4 in Chemical education

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1 answer 76 views

What is the dipole moment of carbon dioxide?

asked Jan 31 in Chemical bonding

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1 answer 83 views

Calculate the standard enthalpy of formation (\Delta H_{f}^{\circ}) for Carbon dioxide (CO_2) using quantum chemical calculations.

asked Jan 31 in Quantum Chemistry

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1 answer 93 views

Calculate the enthalpy change required to ionize 2 moles of magnesium atoms to form Mg2+ ions, given that the first ionization energy of magnesium is 737 kJ/mol and the second ionization energy is 1450 kJ/mol.

asked Jan 23 in ThermoChemistry

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1 answer 68 views

Calculate the enthalpy change for the polymerization of propylene to polypropylene, given the enthalpy of formation of propylene is -103.8 kJ/mol and the enthalpy of formation of polypropylene is -45.4 kJ/mol. Assume the reaction occurs at constant pressure and temperature.

asked Jan 23 in ThermoChemistry

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1 answer 17 views

A chemistry student is given a 25 mL sample of a solution containing an unknown amount of sodium chloride. After adding excess silver nitrate solution to the sample, the student records the mass of the resulting precipitate to be 2.655 grams. Using mass balance calculations, determine the mass percentage of sodium chloride in the original solution.

asked Jan 22 in Analytical Chemistry

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1 answer 85 views

What is the role of a medical psychologist?

asked Jan 20 in Psychology

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1 answer 53 views

Why is Carl Rogers' person-centered therapy important?

asked Jan 20 in Psychology

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0 answers 109 views

When was the operant-conditioning model of pain proposed?

asked Jan 16 in Psychology

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1 answer 24 views

What is the Hawethorne effect?

asked Jan 16 in Psychology

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1 answer 96 views

Compare the effectiveness of pharmacological and non-pharmacological treatments for insomnia.

asked Jan 16 in Psychology

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1 answer 70 views

What is semantic memory?

asked Jan 14 in Psychology

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