A Current of 250

question 55

Multiple Choice

A current of 250. A flows for 24.0 hours at an anode where the reaction occurring is as follows: Mn²⁺(aq) + 2H₂O(l) → MnO₂(s) + 4H⁺(aq) + 2e^-
What mass of MnO₂ is deposited at this anode?

• A) 19.5 kg
• B) 12.9 kg
• C) 9.73 kg
• D) 4.87 kg
• E) 2.43 kg

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Definitions:

Thylakoid Membrane

A membrane-bound compartment inside chloroplasts and cyanobacteria, which contains chlorophyll and is the site of the light-dependent reactions of photosynthesis.

Stroma

The supportive tissue of an epithelial organ, tumor, gonad, etc., consisting of connective tissues and blood vessels, or the dense fluid found inside the chloroplasts of plant cells.

Thylakoid Compartment

The thylakoid compartment is a space within the chloroplasts of plant cells, surrounded by thylakoid membranes, where the light-dependent reactions of photosynthesis occur.

Electron Transport Chain

A series of complexes that transfer electrons from electron donors to electron acceptors via redox reactions and couples this electron transfer with the transfer of protons (H+ ions) across a membrane.