In a Common Car Battery, Six Identical Cells Each Carry

question 37

Multiple Choice

In a common car battery, six identical cells each carry out the following reaction:
Pb + PbO₂ + 2HSO₄^- + 2H⁺ → 2PbSO₄ + 2H₂O
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Suppose that to start a car on a cold morning, 138 amperes is drawn for 12.0 seconds from such a cell. How many grams of Pb are consumed? (The atomic mass of Pb is 207.19 g/mol.)

• A) 0.562 g
• B) 7.11 g
• C) 1.78 g
• D) 0.01235 g
• E) 3.56 g

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Definitions:

Standard Costs

Standard costs are the predetermined costs associated with manufacturing a product or delivering a service, used as benchmarks to measure performance.

Actual Costs

The real expenses incurred in the production or acquisition of goods and services.

Direct Labor Rate Variance

This measures the difference between the actual cost of direct labor and the expected (or standard) cost, calculated by comparing the actual rates paid to workers versus the planned rates.

Overhead

All ongoing business expenses not directly attributed to creating a product or service. This includes costs like rent, utilities, and salaries of employees not directly involved in production.