A Cold Trap Is Set Up to Cause Molecules to Linger

question 24

Multiple Choice

A cold trap is set up to cause molecules to linger near the suction in a vacuum system. If the cold trap has an effective volume of 0.200 L and is maintained at 13.0 K, how many molecules are in it at 10.0 Pa of pressure? (Avogadro's number is 6.022 × 10²³ molecules/mol, and the universal gas constant is 8.314 J/mol•K. Assume the behavior of an ideal gas.)

• A) 1.11 × 10¹⁹ molecules
• B) 1.10 × 10²² molecules
• C) 7.71 × 10²⁰ molecules
• D) 7.71 × 10²³ molecules

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Definitions:

Brontophobia

An excessive fear of thunder and lightning, categorized as a type of specific phobia.

Simple Phobia

An intense, irrational fear of specific objects or situations, such as heights, spiders, or flying, which can lead to significant distress and avoidance behavior.

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Epidemiology

The examination and investigation into the spread, configuration, and causes of health and disease states within specific population groups.