Questions by MagnoliaHend

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1 answer 2 views

What is the current density in an electrochemical cell with a copper electrode and a zinc electrode if the current produced by the cell is 0.5 A and the surface area of the copper electrode is 10 cm² while the surface area of the zinc electrode is 5 cm²?

asked 1 day ago in ElectroChemistry

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1 answer 80 views

How does the activation energy for an electron transfer reaction vary with temperature? What is the relationship between the rate constant and the activation energy of a redox reaction? How can we predict the direction of electron transfer in a redox reaction?

asked Jan 30 in Quantum Chemistry

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1 answer 53 views

How can the concentration of copper ions in a water sample be determined using polarography?

asked Jan 29 in Analytical Chemistry

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1 answer 63 views

Calculate the enthalpy change for the reaction below using Hess's Law and the given thermochemical equations:2H2(g) + O2(g) -> 2H2O(g) deltaH1 = -484 kJ/molH2(g) + 1/2O2(g) -> H2O(g) deltaH2 = -242 kJ/mol 2H2O(g) -> 2H2(g) + O2(g) deltaH3 = +484 kJ/mol

asked Jan 23 in ThermoChemistry

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1 answer 20 views

What is the handicap theory?

asked Jan 15 in Psychology

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1 answer 33 views

What was the central concept in behaviourism?

asked Jan 14 in Psychology

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1 answer 40 views

What is the name for the amount of water vapor in the air?

asked Jan 7 in Science

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1 answer 30 views

What is most of the water used in agriculture used for?

asked Jan 6 in Science

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1 answer 24 views

What are animals that live with tiny zooxanthellae that also photosynthesize?

asked Jan 2 in Science

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1 answer 18 views

There is a positive correlation between the ability to conduct thermal energy and what other energy, as exemplified by metals?

asked Jan 2 in Science

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