You Wish to Prepare a Solution of Methanol (CH₃OH, 32 $\degree$

question 67

Multiple Choice

You wish to prepare a solution of methanol (CH₃OH, 32.04 g/mol) and ethanol (CH₃CH₂OH, 46.07 g/mol) that has a total vapor pressure of 66 torr at 20 $\degree$ C.Calculate the mole fraction of ethanol in the solution that will produce the desired pressure.

• A)0.55
• B)0.68
• C)0.48
• D)0.72
• E)0.38

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Definitions:

Net Operating Income

A measure of a company's profitability calculated by subtracting operating expenses from operating revenues, excluding non-operating income and expenses.

Variable Costing

An accounting method that includes only variable production costs (direct materials, direct labor, and variable manufacturing overhead) in product costs.

Unit Product Cost

The total cost incurred to produce, market, and distribute a single unit of a product.

Variable Costing

This is an accounting method that only includes variable costs—costs that change with production volume—in the calculation of product cost.