Recent activity by Robin6937080

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How does a change in pH affect the formation of the complex ion Cu(NH3)4^2+ from Cu2+ and NH3? Provide a detailed explanation with chemical equations and calculations.

answered 5 days ago in Chemical equilibrium

1 answer 21 views

What is the mechanism for the excited state chemistry of the compound benzene, and how can it be optimized through ab initio calculations?

answered 5 days ago in Computational Chemistry

1 answer 22 views

What are the most effective photochemical properties that determine the efficiency of a photovoltaic material, and how can they be optimized to increase the conversion rate of solar energy into electricity?

asked 5 days ago in PhotoChemistry

1 answer 31 views

What is the bond dissociation energy of a carbon-carbon single bond in ethane (C2H6) given that the enthalpy change for the reaction C2H6(g) → 2CH3(g) is -84.68 kJ/mol?

answered Feb 18 in ThermoChemistry

1 answer 25 views

How does the addition of nanoparticles affect the mechanical properties of polymer nanocomposites, and how does the size, shape, and concentration of the nanoparticles influence these properties?

answered Feb 17 in Polymer Chemistry

1 answer 7 views

How can you optimize the production of surfactants while minimizing waste and reducing environmental impact? Consider factors such as raw materials, process design, and waste management in your solution.

answered Feb 14 in Chemical engineering

1 answer 32 views

What type of hybrid orbitals are present in the molecule of ethene (C2H4)?

asked Feb 13 in Chemical bonding

1 answer 44 views

What are the photochemical properties of commonly used photovoltaic materials, and how can they be optimized to increase their efficiency at converting light into electrical energy?

answered Feb 12 in PhotoChemistry

1 answer 27 views

How can reducing the use of transportation and shifting to a plant-based diet help decrease an individual's carbon footprint and positively impact the environment?

answered Feb 5 in Environmental Chemistry

1 answer 28 views

How can chemistry instructors better support the learning needs of students with disabilities and ensure equal access to the curriculum?

asked Feb 4 in Chemical education

1 answer 30 views

Explore the relationship between the coordination number and the geometry of transition metal complexes, citing specific examples from the literature.

asked Feb 4 in Coordination Chemistry

1 answer 41 views

Calculate the pH of a 0.1 M solution of acetic acid with a dissociation constant (Ka) of 1.8 x 10^-5.

answered Feb 3 in Chemical reactions

1 answer 77 views

What is the concentration of sodium ions in a 0.5M solution of NaCl using a sodium-selective electrode?

asked Jan 30 in Analytical Chemistry

1 answer 59 views

Calculate the Gibbs free energy change at standard conditions for the reaction:2 H2(g) + O2(g) → 2 H2O(l)Given: ΔHºf[H2O(l)] = -285.8 kJ/mol, ΔHºf[H2(g)] = 0 kJ/mol, ΔHºf[O2(g)] = 0 kJ/mol, and ΔSº[H2O(l)] = -69.9 J/K·mol.

asked Jan 23 in Chemical thermodynamics

1 answer 55 views

Calculate the enthalpy change for the hydrolysis of 2 moles of magnesium bromide, MgBr2, in water, given that the standard enthalpy change of formation of magnesium oxide, MgO, is -601.6 kJ/mol and the standard enthalpy change of formation of hydrogen bromide, HBr, is -36.3 kJ/mol.

asked Jan 23 in ThermoChemistry

1 answer 63 views

A chemistry student needs to determine the new equilibrium concentration of a complex ion, if the temperature is increased by 10°C from the initial temperature of 25°C, and the equilibrium constant for the reaction is 0.056. The initial concentration of the reactants are: [Fe3+] = 0.025 M, [SCN-] = 0.015 M, and [FeSCN2+] = 0.007 M.

asked Jan 22 in Chemical equilibrium

1 answer 46 views

According to the experience-dependent plasticity hypothesis, what causes the reduction in visual acuity in the amblyopic eye?

asked Jan 20 in Psychology

1 answer 29 views

When might individuals experience a 'midlife crisis'?

answered Jan 20 in Psychology

0 answers 56 views

What is the identity status of an individual who is currently exploring different identity options?

asked Jan 20 in Psychology

1 answer 35 views

Why is empathy important in therapy?

asked Jan 17 in Psychology

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