Answers by CaridadBaxte

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What is the mechanism for the Pinacol-Pinacolone rearrangement and what factors affect its rate?

answered Feb 22 in Organic Chemistry

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35 views

What is the optimal synthesis condition for the production of polyvinylpyrrolidone with high yield and molecular weight from vinylpyrrolidone monomer using a specific catalyst?

answered Feb 21 in Chemical synthesis

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33 views

What is the electronic excitation energy required for a molecule to absorb light in the visible region and what are its corresponding optical properties?

answered Feb 20 in Quantum Chemistry

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31 views

If 2.5 moles of NaOH reacts with excess HCl, how many moles of NaCl can be produced?

answered Feb 17 in Chemical reactions

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36 views

What is the mechanism of phosphorescence in organic molecules, and what factors determine the efficiency and lifetime of the excited state?

answered Feb 14 in PhotoChemistry

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39 views

Using molecular orbital theory, calculate the bond order of the H2 molecule. Show all your calculations and explain what the bond order indicates about the stability of the molecule.

answered Feb 13 in Chemical bonding

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75 views

What is the effect of cross-linking density on the mechanical properties of PEG-based hydrogels used as scaffolds for tissue engineering applications?

answered Feb 12 in Materials Chemistry

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77 views

How can the release rate of a drug from a polymer-based drug delivery system be controlled by varying the molecular weight and composition of the polymer?

answered Feb 10 in Polymer Chemistry

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79 views

Calculate the standard free energy change for the following redox reaction:2HgO(s) → 2Hg(l) + O2(g)Given: ΔG°f (HgO) = -90.83 kJ/molΔG°f (Hg) = 0 kJ/mol ΔG°f (O2) = 0 kJ/mol.

answered Feb 3 in Chemical thermodynamics

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72 views

Calculate the standard cell potential (E°) for the following electrochemical cell:Zn(s) | Zn2+(aq, 0.100M) || Cr3+(aq, 0.050M) | Cr(s)Given: E°cell (Zn2+/Zn) = -0.76 VE°cell (Cr3+/Cr) = -0.74 V

answered Feb 3 in Physical Chemistry

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129 views

How can X-ray fluorescence (XRF) spectroscopy be used to accurately identify the presence and concentration of specific elements in a given sample, and what are the limitations of this technique for quantitative analysis in analytical chemistry?

answered Jan 30 in Analytical Chemistry

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83 views

Calculate the enthalpy of adsorption of 1 mole of hydrogen gas on the surface of activated charcoal from the given data:- The heat of combustion of hydrogen gas at constant volume is -285.8 kJ/mol- The heat of combustion of hydrogen gas at constant pressure is -241.8 kJ/mol- The heat of vaporization of hydrogen gas at its boiling point (20.3 K) is 0.452 kJ/mol- The surface area of activated charcoal is 500 m²/g- The weight of activated charcoal used is 0.5 g.

answered Jan 23 in ThermoChemistry

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138 views

When evaluating a theory, what is the criterion for internal consistency?

answered Jan 20 in Psychology

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89 views

According to the parallel distributed processing model, what happens when we receive information?

answered Jan 17 in Psychology

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74 views

According to the validity theory, what is construct validity?

answered Jan 17 in Psychology

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55 views

Where is the criterion of testability important in the theoretical models?

answered Jan 16 in Psychology

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42 views

Compare the potential therapeutic uses of ketamine and electroconvulsive therapy in treating depression.

answered Jan 16 in Psychology

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35 views

When does observational learning occur according to Bandura?

answered Jan 15 in Psychology

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47 views

Where do lancelets live?

answered Jan 8 in Science

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98 views

What is the term for the method of sending out ultrasound waves to determine the locations of objects?

answered Jan 7 in Science

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