Recent activity by AnnabelleHed

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What strategies can a student use to adequately prepare for a chemistry exam and avoid inadequate exam preparation?

answered 6 days ago in Chemical education

1 answer 58 views

What is the concentration of iron (II) ions in a water sample if the absorbance of the sample at a wavelength of 565 nm is measured to be 0.842 and it was found that a 1 cm cuvette contains 1.25 x 10^-4 moles of iron (II) ions? (The molar absorptivity of iron (II) ions at 565 nm is 1.9 x 10^4 L/mol cm).

answered 6 days ago in Analytical Chemistry

1 answer 51 views

A student needs to calculate the Tafel slopes for the anodic and cathodic reactions from a given set of experimental data obtained during an electrochemical experiment. The experiment involves the corrosion of iron in a solution with a pH of 3.5. The anodic and cathodic current densities were measured at various applied potentials ranging from -700 mV vs SHE to -400 mV vs SHE. The student needs to plot a Tafel plot for each reaction and calculate their corresponding Tafel slopes. Based on the obtained results, the student needs to explain the corrosion mechanism of iron in the given acidic solution.

answered Jan 22 in ElectroChemistry

1 answer 68 views

A chemistry student needs to determine the precipitate formed when 50 mL of 0.2 M silver nitrate solution is mixed with 75 mL of 0.1 M potassium chloride solution. What is the mass of the precipitate formed and what is the percent yield of the reaction?

asked Jan 22 in Chemical reactions

1 answer 38 views

What is the Criticism of Solution-Focussed Therapy?

asked Jan 16 in Psychology

1 answer 25 views

According to sociobiology, what is the purpose of animal behaviour?

answered Jan 16 in Psychology

1 answer 22 views

What is the phi coefficient?

answered Jan 16 in Psychology

1 answer 19 views

When does the Cognitive Theory of Multimedia Learning suggest learning is enhanced?

answered Jan 15 in Psychology

1 answer 18 views

What is testability?

answered Jan 15 in Psychology

1 answer 38 views

Who proposed the concept of Positive Psychology?

asked Jan 15 in Psychology

1 answer 47 views

What did Abraham Maslow propose in his Hierarchy of Needs theory?

answered Jan 13 in Psychology

1 answer 31 views

Which is the least massive outer planet?

answered Jan 8 in Science

1 answer 19 views

What type of vascular plants produce seeds in cones?

asked Jan 8 in Science

1 answer 26 views

What level is greater than 7 in a basic solution?

asked Jan 7 in Science

1 answer 26 views

What can help scientist gather information for an investigation?

answered Jan 6 in Science

1 answer 21 views

Group 16 is called what?

answered Dec 30, 2024 in Science

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