What Is the Concentration (Ppm)of Helium in the Atmosphere If

question 37

Multiple Choice

What is the concentration (ppm) of helium in the atmosphere if the mole fraction of helium in dry air near sea level is 0.00000524?

• A)5.24
• B)1.91 × 10¹¹
• C)5.24 × 10^-4
• D)5240
• E)5.24 × 10^-12

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Definitions:

Prefrontal Cortex

The prefrontal cortex is a part of the brain located at the front of the frontal lobes; it is involved in complex behaviors including planning, decision making, and moderating social behavior.

Parietal Lobe

A region of the brain located at the upper back area in the skull, crucial for processing sensory information and spatial navigation.

Thalamus

A major part of the brain located at the center of the brain, functioning as a relay station for sensory and motor signals to the cerebral cortex.

Hippocampus

A major component of the brain involved in memory formation, spatial navigation, and the consolidation of information from short-term to long-term memory.