In the context of star formation efficiency, what is generally true about the mass of a molecular cloud?

Answer

The vast majority of the initial material does not end up forming a star.

The process of star birth is inherently inefficient, meaning that a significant portion of the initial gas and dust in a molecular cloud either remains scattered or fails to meet the mass threshold required to become a star.

In the context of star formation efficiency, what is generally true about the mass of a molecular cloud?

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