Questions by RigobertoWat

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1 answer 24 views

What is the relationship between the surface tension of a liquid and its intermolecular forces? How can the surface tension of a liquid be measured experimentally?

asked 1 day ago in Surface Chemistry

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1 answer 28 views

How does the presence of entanglement and coherence affect the physical and chemical properties of molecular and nanoscale systems, and how can this knowledge be applied in the development of new materials and technologies?

asked 3 days ago in Quantum Chemistry

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1 answer 14 views

What is the optimum pH for the adsorption of methylene blue dye onto activated carbon and how does it affect the efficiency of the adsorption process?

asked 4 days ago in Surface Chemistry

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1 answer 27 views

What is the coordination geometry of the metal center in the active site of the metalloenzyme carbonic anhydrase? How does this coordination geometry facilitate the enzyme's catalytic activity?

asked 6 days ago in Coordination Chemistry

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1 answer 25 views

How does the absorption spectra of naphthalene change upon rotation around the C-C bond in its excited state, and what insights can it provide into the electronic properties of the molecule?

asked Feb 17 in Computational Chemistry

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1 answer 42 views

How does the release of chlorofluorocarbons (CFCs) into the atmosphere contribute to ozone depletion, and what are some viable solutions to prevent further ozone depletion?

asked Feb 12 in Environmental Chemistry

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1 answer 29 views

For a student studying surface chemistry and the adsorption of gases on solid surfaces, a precise problem could be: What is the effect of temperature on the adsorption of nitrogen gas on activated charcoal and how does it change the isotherm?

asked Feb 4 in Surface Chemistry

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1 answer 67 views

Calculate the standard enthalpy of formation of methane (CH4) given the following enthalpy data: C(graphite) + 2H2(g) → CH4(g) ΔH° = -74.8 kJ/mol ΔH°f[C(graphite)] = 0 kJ/molΔH°f[H2(g)] = 0 kJ/mol (Hint: Use Hess's Law and the fact that the standard enthalpy of formation of an element in its most stable state is zero.)

asked Feb 3 in ThermoChemistry

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1 answer 33 views

Calculate the standard enthalpy change of the following chemical reaction at 298 K given the following bond energies: 2H2(g) + O2(g) --> 2H2O(l) Bond energies: H-H: 432 kJ/mol O=O: 498 kJ/mol O-H: 464 kJ/mol

asked Feb 3 in Physical Chemistry

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1 answer 82 views

What is the effect of adding a small amount of nickel to a titanium alloy on the strength and corrosion resistance of the alloy, and how does this influence its suitability for aerospace applications?

asked Jan 30 in Materials Chemistry

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1 answer 59 views

How can liquid chromatography be used to identify the components present in a sample mixture, and what is the specific protocol to be followed to separate and analyze the components accurately?

asked Jan 29 in Analytical Chemistry

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1 answer 60 views

How can electrophoresis be used to identify the proteins present in a biological sample and determine their molecular weight?

asked Jan 29 in Analytical Chemistry

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1 answer 9 views

Assuming you have a mixture of ethanol and water, design a distillation column that can achieve a 95% purity of ethanol in the distillate using the minimum number of plates possible. The feed to the column contains 40% ethanol and 60% water, and the distillate and bottoms products need to be at least 95% pure. The column operates at atmospheric pressure and the feed rate is 100 kg/hr. Also, determine the reflux ratio required to achieve this separation.

asked Jan 22 in Chemical engineering

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1 answer 34 views

What is the core tenet of the information-processing model of cognition?

asked Jan 20 in Psychology

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0 answers 26 views

Who distinguished between 'figure' and 'ground'?

asked Jan 20 in Psychology

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1 answer 13 views

Why is the age-difference hypothesis significant?

asked Jan 20 in Psychology

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1 answer 47 views

What are some potential drawbacks of incorporating indigenous knowledge into mainstream psychology?

asked Jan 16 in Psychology

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1 answer 28 views

What is disorganised attachment?

asked Jan 14 in Psychology

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1 answer 33 views

What is the DSM-5 diagnostic criteria for major depressive disorder?

asked Jan 14 in Psychology

0 votes

1 answer 28 views

What is disenfranchised grief?

asked Jan 14 in Psychology

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