Mixtures of Helium and Oxygen Are Used in Scuba Diving

question 39

Multiple Choice

Mixtures of helium and oxygen are used in scuba diving tanks to help prevent the bends, which is a condition caused by nitrogen bubbles forming in the bloodstream. If 75 L of oxygen and 25 L of helium at STP are pumped into a scuba tank with volume of 8.0 L, what is the partial pressure of oxygen in the tank?

• A) 3.1 atm
• B) 9.4 atm
• C) 12.5 atm
• D) 15.6 atm
• E) 18.8 atm

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Definitions:

Attribution Theory

The theory concerning how people explain individual occurrences of causation, including how people infer the causes of their own and others' behaviors.

Cognitive Dissonance Theory

suggests that individuals experience discomfort (or dissonance) when holding conflicting cognitions, leading them to change attitudes, beliefs, or actions to reduce the dissonance.

Psychoanalytic Theory

A theory of psychology and psychotherapy developed by Sigmund Freud that emphasizes unconscious processes and childhood experiences in shaping behavior.

Equity

Fairness or justice in the way people are treated, often discussed in the context of social policy, economics, or law.