Barbiturates Are Synthetic Drugs Used as Sedatives and Hypnotics

question 62

Multiple Choice

Barbiturates are synthetic drugs used as sedatives and hypnotics. Barbital ( = 184.2 g/mol) is one of the simplest of these drugs. What is the boiling point of a solution prepared by dissolving 42.5 g of barbital in 825 g of acetic acid? K_b = 3.07°C/m; boiling point of pure acetic acid = 117.9°C

• A) 117.0°C
• B) 117.7°C
• C) 118.1°C
• D) 118.8°C
• E) >120°C

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Definitions:

Break-Even Point

The point at which total costs and total revenue are equal, resulting in no net gain or loss.

Variable Cost

A cost that changes in proportion to the level of output or activity.

Variable Costs

Costs that vary directly with the level of production or output, such as materials and labor.

Contribution Margin

The selling price per unit, minus the variable cost per unit, used to determine the profitability of products or services.