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:

High-low Method

A technique used in cost accounting to determine variable and fixed costs based on the highest and lowest levels of activity.

Line of Best Fit

A straight line drawn through the center of a group of data points plotted on a scatter plot, used to estimate the trend of the data and predict future values.

Indirect Costs

Expenses not directly tied to the production of goods or services, such as overhead costs for administration, facilities, and security.

Cost Object

Anything for which a separate measurement of costs is desired, such as products, services, projects, or departments.