Which, If Any, of the Following Metals Would Not Be

question 94

Multiple Choice

Which, if any, of the following metals would not be capable of acting as a sacrificial anode when used with iron E°_Fe = -0.44 V; all E° values refer to the M²⁺/M half-cell reactions.

• A) manganese, Mn, E° = -1.18 V
• B) cadmium, Cd, E° = -0.40 V
• C) magnesium, Mg, E° = -2.37 V
• D) zinc, Zn, E° = -0.76 V
• E) All of these metals are capable of acting as sacrificial anodes with iron.

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Definitions:

Motor Vehicle Licenses

Fees paid to a governmental authority for the registration and licensing of vehicles for operation on public roads.

Depreciation

The systematic allocation of an asset's cost over its useful life.

Useful Life

The estimated period that an asset is expected to be useful for the purpose it was acquired by the company.

Declining-Balance Method

Depreciation method that applies a constant rate to the declining book value of the asset and produces a decreasing annual depreciation expense over the useful life of the asset.