Recent activity by WalterRandol

1 answer 48 views

What is the amount of copper ions present in a 1.0 mL sample of copper sulfate solution, when a current of 3.0 A for 10 seconds is used for coulometry analysis, assuming 100% efficiency in electrode reactions and a coulombic efficiency of 90%?

answered 6 days ago in Analytical Chemistry

1 answer 41 views

How can Raman spectroscopy be used to identify the presence of specific compounds, such as organic molecules, in a contaminated soil sample?

answered Jan 29 in Analytical Chemistry

1 answer 50 views

Calculate the enthalpy change for the combustion of methane, given the following balanced chemical equation:CH4(g) + 2O2(g) -> CO2(g) + 2H2O(g)The enthalpies of formation for methane, carbon dioxide, and water are -74.8 kJ/mol, -393.5 kJ/mol, and -241.8 kJ/mol respectively.

answered Jan 23 in Chemical thermodynamics

1 answer 5 views

A copper electrode is immersed in a 0.1M solution of CuSO4 and a zinc electrode is immersed in 0.1M solution of ZnSO4. Both the solutions are connected with a salt bridge. If the standard reduction potentials of Cu2+/Cu and Zn2+/Zn are +0.34V and -0.76 V respectively, calculate the potential difference between the two electrodes at 25°C.

asked Jan 22 in ElectroChemistry

1 answer 56 views

Where does the cognitive interview typically occur?

asked Jan 20 in Psychology

1 answer 31 views

Why is the study of animal intelligence important for evaluating animal psychology?

answered Jan 16 in Psychology

1 answer 45 views

What is the importance of evidence-based practice in psychology?

asked Jan 15 in Psychology

1 answer 20 views

What is the 'Social Cognitive theory'?

answered Jan 14 in Psychology

1 answer 31 views

What supports most of earth's ecosystems?

asked Jan 7 in Science

1 answer 21 views

What season causes people to look forward to spring?

answered Jan 7 in Science

1 answer 26 views

The primary amine in which the nitrogen atom is attached directly to a benzene ring has a special name, what is it?

asked Jan 2 in Science

1 answer 30 views

How much work is done when a force is applied in a different direction than the direction of movement?

answered Dec 30, 2024 in Science

1 answer 23 views

Chemical reactions always involve what?

answered Dec 30, 2024 in Science

1 answer 30 views

Organic substances, including proteins, carbohydrates, and oils, contain what element?

answered Dec 28, 2024 in Science

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