Answers by LamontMccror

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How does the photochemical reaction in a photovoltaic cell work to generate electricity, and what are the specific properties of the materials used that make them efficient in converting sunlight to electricity?

answered Feb 22 in PhotoChemistry

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30 views

What is the mechanism behind the ability of detergents to remove oil and grease from surfaces?

answered Feb 20 in Surface Chemistry

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35 views

What is the bond dissociation energy required to break the carbon-hydrogen bond in methane (CH4)? (Hint: the bond dissociation energy is the amount of energy required to break a bond and form separate atoms or molecules.)

answered Feb 18 in ThermoChemistry

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33 views

How do we predict the outcome of a redox reaction and determine the electron transfer rate for a given reaction using quantum chemical methods?

answered Feb 14 in Quantum Chemistry

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56 views

What is the effect of increasing the concentration of a salt solution on its conductivity and how does this relate to the number of ions present in the solution?

answered Feb 13 in Inorganic Chemistry

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128 views

How does exposure to different air pollutants, such as nitrogen oxides or ozone, affect the respiratory system of humans? Identify and explain the mechanisms of these pollutants' effects on our health.

answered Feb 13 in Environmental Chemistry

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30 views

How can we design a new drug that specifically targets cancer cells while leaving healthy cells unharmed?

answered Feb 12 in Medicinal Chemistry

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42 views

What is the mechanism by which Chlorofluorocarbons (CFCs) contribute to the depletion of the ozone layer, and how does this impact the prevalence of skin cancer and other harmful effects on human health and the environment?

answered Feb 12 in Environmental Chemistry

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25 views

How does the chirality of a molecule affect its photochemical properties, and how can this knowledge be applied in designing new chiral molecules with specific photochemical properties?

answered Feb 12 in PhotoChemistry

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40 views

How can chemistry teachers or institutions provide adequate and effective hands-on experimentation opportunities for students, despite limited resources and equipment?

answered Feb 5 in Chemical education

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108 views

Design a heat exchanger for the production of sulfuric acid at a flow rate of 1000 liters per hour. The inlet temperature of the acid is 80°C and the desired outlet temperature is 30°C. The cooling water is available at 20°C and has a flow rate of 2000 liters per hour. Determine the required heat transfer area of the heat exchanger assuming the overall heat transfer coefficient is 800 W/(m²K). What material would you recommend for the heat exchanger tubes and why?

answered Feb 4 in Chemical engineering

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68 views

Calculate the melting point of a mixture of 1 mol of benzene and 2 mol of toluene, given that the pure components have melting points of 5.5 °C and -95.0 °C, respectively.

answered Jan 23 in Physical Chemistry

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59 views

Calculate the change in enthalpy and entropy for the reaction Mg(s) + 2HCl(aq) → MgCl2(aq) + H2(g) at 25°C given the following data:- ΔH°f for MgCl2(aq) = -641.3 kJ/mol- ΔS°f for MgCl2(aq) = -200.9 J/K/mol- ΔH°f for H2(g) = 0 kJ/mol- ΔS°f for H2(g) = 130.7 J/K/mol- ΔH°f for HCl(aq) = -167 kJ/mol- ΔS°f for HCl(aq) = -18.8 J/K/mol- ΔH°f for Mg(s) = 0 kJ/mol- ΔS°f for Mg(s) = 32.7 J/K/molAssume that ΔH°f and ΔS°f are independent of temperature.

answered Jan 23 in Inorganic Chemistry

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Calculate the cell potential for the following galvanic cell where a nickel anode is placed in a 1.0M Ni(NO3)2 solution and a silver cathode is placed in a 1.0M AgNO3 solution. The balanced equation for the cell reaction is: Ni(s) + 2 Ag+(aq) → Ni2+(aq) +2 Ag(s) Assume that standard reduction potentials for each half-reaction are as follows: Ni2+(aq) + 2 e- ⇌ Ni(s) E° = -0.25V Ag+(aq) + e- ⇌ Ag(s) E° = +0.80V What is the cell potential at standard conditions (25°C and 1 atm)?

answered Jan 23 in ElectroChemistry

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76 views

A chemistry student wants to determine the surface area of a metal oxide sample using the Langmuir adsorption isotherm. The student collects adsorption data at different pressures and determines the amount of gas adsorbed on the surface. The Langmuir isotherm equation used is y = Kx / (1 + Kx), where y is the fractional surface coverage, x is the pressure of the gas, and K is a constant related to the adsorption energy. The student obtains the following data:Pressure (atm) | Fractional surface coverage-------------|---------------------------

answered Jan 22 in Surface Chemistry

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33 views

When using the information processing theory in teaching, what should teachers consider?

answered Jan 20 in Psychology

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35 views

What is microaggression?

answered Jan 20 in Psychology

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69 views

According to the information processing approach, what is the process of learning?

answered Jan 16 in Psychology

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57 views

When can illusory motion occur?

answered Jan 15 in Psychology

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75 views

According to the social desirability bias, what does it refer to?

answered Jan 15 in Psychology

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