Recent activity by CharlotteBal

1 answer 21 views

Calculate the power output of an electrochemical cell that uses a cathode made of silver metal immersed in a solution containing silver ions with a concentration of 0.05 M and an anode made of zinc metal immersed in a solution containing zinc ions with a concentration of 0.1 M. The temperature of the solutions is 298 K and the cell operates at a current of 0.5 A.

answered 2 days ago in ElectroChemistry

1 answer 39 views

How can ab initio calculations of excited state dynamics be used to predict the behavior of molecules in photochemical reactions?

answered 6 days ago in Computational Chemistry

1 answer 52 views

How can the composition of a mixture of caffeine and aspirin be analyzed using liquid chromatography?

asked Jan 29 in Analytical Chemistry

1 answer 51 views

Calculate the exchange current density at the cathode of a lithium-ion battery if the temperature of the battery is 25 °C, the standard potential of

answered Jan 23 in ElectroChemistry

1 answer 46 views

Calculate the enthalpy change for the combustion of methane gas (CH4) at constant pressure, given that the standard enthalpy of formation for CH4 is -74.8 kJ/mol and the balanced chemical equation for the combustion reaction is:CH4 (g) + 2 O2 (g) → CO2 (g) + 2 H2O (l) The molar enthalpy of formation of CO2 is -393.5 kJ/mol and that of H2O is -285.8 kJ/mol.

asked Jan 23 in Chemical thermodynamics

1 answer 56 views

A chemistry student was given a sample of an unknown compound. The student performed an analysis on the sample using mass balance calculations and obtained the following data: the sample had a mass of 2.64 g and contained 1.32 g of carbon, 0.22 g of hydrogen, and 0.88 g of oxygen. What is the molecular formula of the unknown compound?

asked Jan 22 in Analytical Chemistry

1 answer 16 views

According to Gibson's ecological theory of perception, what is the role of affordances in perception?

asked Jan 17 in Psychology

1 answer 13 views

How does the biopsychosocial model view trauma?

answered Jan 17 in Psychology

1 answer 16 views

When was the behaviourist theory proposed?

asked Jan 16 in Psychology

1 answer 6 views

According to Lawrence Kohlberg, at what stage of moral development do adolescents follow universal ethical principles?

answered Jan 15 in Psychology

1 answer 26 views

What is the alternative hypothesis?

asked Jan 13 in Psychology

1 answer 25 views

Which kind of vertebrates are amphibians?

answered Jan 8 in Science

1 answer 31 views

When waves of two different frequencies interfere, what phenomenon occurs?

answered Jan 8 in Science

1 answer 14 views

What theory of gases describes this state of matter as composed of tiny particles in constant motion with a lot of distance between the particles?

answered Jan 8 in Science

1 answer 20 views

What results when the water vapor from a hot shower contacts the cooler surface of a mirror?

answered Jan 7 in Science

1 answer 55 views

What part of the body do fish use to absorb oxygen?

answered Jan 7 in Science

1 answer 7 views

What are mercury manometers often used to measure?

answered Jan 3 in Science

1 answer 47 views

Most biochemical molecules are macromolecules, meaning that they are what?

asked Dec 31, 2024 in Science

1 answer 27 views

Life probably began where?

answered Dec 31, 2024 in Science

1 answer 25 views

Bicarbonate is the second most abundant anion in the blood. its principal function is to maintain your body’s acid-base balance by being part of these?

asked Dec 30, 2024 in Science

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