Answers by Maura45O7086

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What is the optimal reaction conditions (temperature, pressure, concentration) for the preparation of 2,4,6-trinitrotoluene from toluene and nitric acid, and what is the yield of the reaction under these conditions?

answered 3 days ago in Chemical synthesis

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22 views

What are the optimal reaction conditions for synthesizing polyurethane from diisocyanate and polyol, such that a high molecular weight and desirable material properties are achieved?

answered 3 days ago in Chemical synthesis

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20 views

What is the effect of the structural modifications on the fluorescence properties of a specific dye molecule investigated in the literature of photochemistry of fluorescent dyes?

answered 5 days ago in PhotoChemistry

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31 views

How does the choice of polymer type and 3D printing parameters (e.g., temperature, speed, layer thickness) affect the mechanical properties (e.g., strength, flexibility) of the printed object?

answered 6 days ago in Polymer Chemistry

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33 views

How can the photochemical properties of luminescent materials be optimized to enhance their efficiency in light-emitting devices?

answered Feb 10 in PhotoChemistry

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32 views

How can chemistry students overcome the challenges of insufficient funding for chemistry education in their institutions?

answered Feb 5 in Chemical education

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39 views

Calculate the standard enthalpy change for the complete combustion of 2 moles of methane gas under standard conditions, where all reactants and products are in their standard states. The balanced chemical equation for the combustion of methane is CH4(g) + 2O2(g) → CO2(g) + 2H2O(l), and the standard enthalpy of formation ΔH°f for methane, carbon dioxide, and water are -74.8 kJ/mol, -393.5 kJ/mol, and -285.8 kJ/mol, respectively.

answered Feb 3 in Chemical thermodynamics

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40 views

Calculate the molar mass of barium nitrate (Ba(NO3)2).

answered Jan 23 in Inorganic Chemistry

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69 views

Calculate the Gibbs free energy change for the combustion of methane gas to produce carbon dioxide and water vapor at a temperature of 298K and a pressure of 1 atm, given the equation:CH4(g) + 2O2(g) -> CO2(g) + 2H2O(g) ΔG°f = -394.36 kJ/mol (CO2); ΔG°f = -237.13 kJ/mol (H2O); ΔG°f = -50.8 kJ/mol (CH4); ΔG°f = 0 kJ/mol (O2)

answered Jan 23 in Chemical thermodynamics

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70 views

Calculate the amount of heat released when 10.0 g of methane (CH4) is burned completely in excess oxygen if the enthalpy of combustion of methane is -890 kJ/mol.

answered Jan 23 in Physical Chemistry

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86 views

What spectroscopic technique can be used to distinguish between two organic compounds with similar molecular formula but different functional groups?

answered Jan 21 in Organic Chemistry

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30 views

Please evaluate the Marshmallow test.

answered Jan 20 in Psychology

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55 views

How does the social identity theory explain group membership and belonging?

answered Jan 20 in Psychology

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25 views

Who developed the cognitive-mediational theory?

answered Jan 20 in Psychology

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25 views

What are some of the ethical implications of conducting psychology research with groups?

answered Jan 20 in Psychology

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23 views

What is object permanence?

answered Jan 20 in Psychology

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30 views

Who is responsible for determining the direction of a correlation?

answered Jan 17 in Psychology

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33 views

What is the difference between parallel processing and serial processing?

answered Jan 15 in Psychology

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45 views

What is sexual dysfunction?

answered Jan 14 in Psychology

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29 views

What is the serial position effect?

answered Jan 13 in Psychology

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