When Paper Is Burned,the Mass of the Remaining Ash Is

question 43

Multiple Choice

When paper is burned,the mass of the remaining ash is less than the mass of the original paper.Which of the following is the best explanation for this apparent violation of the Law of Conservation of Mass?

• A)Some of the mass is converted into the heat energy evolved from burning
• B)When invisible substances are taken into account, the total mass of the reactants is equal to the total mass of the products
• C)The ash is more dense than the paper
• D)The different molecular structure of the ash causes it to appear to have less mass until it is compacted
• E)The mass of the ash cannot be accurately determined

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Definitions:

Variable Costing

A costing method that includes only variable production costs—direct materials, direct labor, and variable manufacturing overhead—in product cost.

Operating Results

The outcome of a company's core business activities, including revenue generation and expenses, over a specific period.

Fixed Cost

Costs that do not vary with the level of production or sales, remaining constant within a specific range of activity.

Contribution Margin

The difference between a company's sales revenue and its variable costs.