Questions by ZVWShalanda

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1 answer 53 views

Calculate the enthalpy change for the polymerization of polyethylene using the following information: ΔHf° of ethylene (-20.4 kJ/mol) and polyethylene (-1024 kJ/mol); the reaction equation: nC2H4 (g) → [-CH2-CH2-]n (s)

asked Jan 23 in ThermoChemistry

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1 answer 56 views

Calculate the current density in an electrochemical cell if a current of 2.5 A is passed through a copper electrode with a surface area of 25 cm² and a silver electrode with a surface area of 10 cm² for 3 hours. The half-cell potentials of copper and silver electrodes are +0.34 V and +0.80 V, respectively, and the molar concentrations of copper and silver ions in the electrolyte are 0.5 M and 1 M, respectively.

asked Jan 23 in ElectroChemistry

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1 answer 20 views

How does the social identity theory explain the role of group membership in intergroup violence?

asked Jan 20 in Psychology

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1 answer 34 views

Please compare the stages of cognitive development proposed by Piaget and Vygotsky.

asked Jan 20 in Psychology

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1 answer 15 views

How does biopsychology explain motivation?

asked Jan 17 in Psychology

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1 answer 15 views

How does attachment theory explain the impact of childhood trauma?

asked Jan 17 in Psychology

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1 answer 18 views

What is the Health Locus of Control theory?

asked Jan 15 in Psychology

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1 answer 19 views

What carries the instructions from the nucleus to the cytoplasm?

asked Jan 6 in Science

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1 answer 29 views

Sound navigation and ranging is an acronym for what, which is used to locate underwater objects such as submarines?

asked Dec 31, 2024 in Science

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1 answer 27 views

How many weeks are in the life cycle of ladybugs

asked Dec 30, 2024 in Science

0 votes

1 answer 7 views

What is the major selective advantage of myelination?

asked Dec 27, 2024 in Science

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