The Standard Cell Potential (E°) of a Voltaic Cell Constructed

question 20

Multiple Choice

The standard cell potential (E°) of a voltaic cell constructed using the cell reaction below is 0.76 V:

With P_H2 = 1.0 atm and [Zn²⁺] = 1.0 M, the cell potential is 0.66 V. The concentration of H⁺ in the
Cathode compartment is _ M.

• A) 4.2 × 10^{- 4}
• B) 1.0 × 10^{- 12}
• C) 4.9 × 10¹
• D) 2.0 × 10^{- 2}
• E) 1.4 × 10^{- 1}

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Definitions:

Break-Even Point

The point at which total costs and total revenue are equal, and no profit or loss is generated.

Contribution Margin Ratio

A financial metric that shows the percentage of sales revenue that exceeds variable costs, indicating how much revenue contributes to fixed costs and profit.

Break-Even Point

The point at which total costs and total revenue are equal, meaning no net loss or gain is incurred.

Variable Manufacturing Costs

Costs that fluctuate with the amount of production output, including expenses like raw materials, direct labor, and other costs that change with production volume.