A Solution of MnO₄^2- Is Electrolytically Reduced to Mn³⁺

question 40

Multiple Choice

A solution of MnO₄^2- is electrolytically reduced to Mn³⁺. A current of 8.46 amp is passed through the solution for 15.0 minutes. What is the number of moles of Mn³⁺ produced in this process? (1 faraday = 96,485 coulombs)

• A) 0.000438 mol
• B) 0.0197 mol
• C) 0.0789 mol
• D) 0.0395 mol
• E) 0.0263 mol

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Definitions:

Double-Declining-Balance

A method of accelerated depreciation which doubles the regular depreciation amount.

Capitalize Development Costs

The accounting practice of adding the costs associated with developing a new product or service to the balance sheet as an asset, rather than expensing them.

Research Costs

Expenses related to the investigation and discovery of new knowledge that could be useful for the development of new products or services.

Units-Of-Production Method

A depreciation method that allocates an asset’s cost based on its usage, productivity, or units produced, rather than the passage of time.