A Sample Containing a 50/50 Mixture of Water and D₂O

question 6

Multiple Choice

A sample containing a 50/50 mixture of water and D₂O (1:1 D₂O:H₂O) is placed in a vial and sealed. The liquid/vapor system is allowed to come to equilibrium at room temperature. What will be the relative concentration ratio of the remaining liquid?

• A) there will be more D₂O than H₂O
• B) there will be less D₂O than H₂O
• C) Still 1:1
• D) Indeterminate
• E) none of the above

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Definitions:

Variable Manufacturing Costs

Costs that vary in total directly and proportionately with changes in the production volume, including direct materials, direct labor, and variable manufacturing overhead.

Selling Commission

A fee paid to a salesperson or agent for facilitating a sale, typically a percentage of the sale price.

Operating Leverage

A measure of how revenue growth translates into growth in operating income, indicating the proportion of fixed versus variable costs a company has.

Variable Expenses

Expenses that fluctuate with changes in production volume or business activity levels, including materials, labor, and utilities.