Recent activity by StaciaSerisi

1 answer 27 views

How can the concentration of Persistent organic pollutants (POPs) in water bodies be effectively measured and reduced to mitigate their impact on aquatic organisms and the overall ecosystem?

answered 5 days ago in Environmental Chemistry

1 answer 38 views

Design a system for the safe storage and transportation of 1000 liters of hydrochloric acid, taking into account factors such as temperature and pressure control, compatibility with the storage container and transportation vehicle, and emergency response measures in case of spills or leaks.

asked Feb 4 in Chemical engineering

1 answer 39 views

Consider a zinc electrode in a concentration cell that is connected to a copper electrode through a salt bridge. During the electrolysis of an aqueous solution of ZnSO4, a current of 2.5 A is passed through the cell for 20 minutes. Calculate the mass of zinc deposited on the electrode during this time assuming 100% efficiency. (Molar mass of zinc = 65.38 g/mol)

asked Feb 3 in ElectroChemistry

1 answer 45 views

Calculate the standard enthalpy change (∆H°) for the reaction: NaOH(aq) + HCl(aq) -> NaCl(aq) + H2O(l) given the following information: - The enthalpy change of neutralization of HCl(aq) with NaOH(aq) is -55.9 kJ/mol. - The enthalpy of formation of NaCl(s) is -411.2 kJ/mol.- The enthalpy of vaporization of water (H2O) is 40.7 kJ/mol.Assume that the specific heat capacity of the water is 4.18 J/g K and the density of the solution is 1 g/mL.

asked Feb 3 in Chemical thermodynamics

1 answer 35 views

How does changing the concentration of one of the reactants affect the rate and sustainability of the reaction between potassium permanganate and hydrogen peroxide in acidic solution?

answered Feb 3 in Chemical kinetics

1 answer 60 views

What novel drug delivery system could be designed for an anti-cancer drug that typically has low bioavailability and improved efficacy, using principles of medicinal chemistry and optimization techniques?

asked Jan 30 in Medicinal Chemistry

1 answer 48 views

What is the product obtained when 2-methyl-2-butene reacts with HBr in the presence of peroxide?

answered Jan 21 in Organic Chemistry

1 answer 30 views

When does IQ testing become problematic?

answered Jan 20 in Psychology

1 answer 44 views

What is the role of metapsychology in evaluating psychological theories?

answered Jan 16 in Psychology

1 answer 34 views

How does the concept of reproductive strategies relate to evolutionary psychology?

answered Jan 15 in Psychology

1 answer 38 views

What is the function of the parasympathetic division of the autonomic nervous system?

answered Jan 14 in Psychology

1 answer 30 views

If the experimental value is less than the accepted value, the error is what?

asked Dec 30, 2024 in Science

1 answer 11 views

How many eyelid membranes do frogs have?

answered Dec 30, 2024 in Science

1 answer 49 views

How many chambers are in a reptiles heart?

answered Dec 30, 2024 in Science

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