The Mole Fraction of Oxygen Molecules in Dry Air Is

question 119

Multiple Choice

The mole fraction of oxygen molecules in dry air is 0.2095. What volume of dry air at 1.00 atm and 25°C is required for burning completely 1.00 L of octane (C₈H₁₈, density = 0.7025 g/mL) , yielding carbon dioxide and water? (R = 0.08206 L • atm/K • mol)

• A) 394 L
• B) 1880 L
• C) 8220 L
• D) 8970 L
• E) 17,900 L

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Definitions:

Absorption Costing

An accounting method that includes all manufacturing costs - direct materials, direct labor, and both variable and fixed manufacturing overhead - in the cost of a unit of product.

Net Operating Income

Represents the difference between operating revenues and operating expenses.

Common Fixed Expenses

Expenses that do not vary with the level of production or sales, shared among different business segments or products.

Segmented Income Statement

An income statement broken down into segments, such as product lines or geographical areas, to analyze profitability.