Molecular Speeds: a Container Is Filled with a Mixture of Helium

question 105

Multiple Choice

Molecular speeds: A container is filled with a mixture of helium (light molecules) and oxygen (heavy molecules) gases. A thermometer in the container reads 22°C. Which gas molecules have the greater average speed?

• A) It is the same for both of the gases because the temperatures are the same.
• B) The oxygen molecules do because they are diatomic.
• C) The oxygen molecules do because they are more massive.
• D) The helium molecules do because they are less massive.
• E) The helium molecules do because they are monatomic.

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Definitions:

Process Cost Accounting System

A bookkeeping mechanism for distributing costs among similar items that are produced in large scale and without interruption.

Equivalent Units of Production

A concept in cost accounting used to assign costs to partially completed goods, calculated by taking the number of units in the production process and converting them into a number of completed units.

Conversion Cost

The combined total of labor and manufacturing overhead costs necessary to convert raw materials into finished products.

Direct Materials

Raw materials that can be directly traced to the manufacturing of a product in terms of cost and physical presence.