The element X has two naturally occurring isotopes. The masses (amu) and % abundances of the isotopes are given in the table below. The average atomic mass of the element is __________ amu. 
Definitions:
Coral Reef System
A diverse underwater ecosystem characterized by reef-building corals. These systems are found in warm, shallow ocean waters and support a wide range of marine life.
Freshwater
Water that has a low salt concentration, commonly found in rivers, lakes, streams, and ponds.
Oxygen
A chemical element with symbol O, critical for the survival of most terrestrial life forms, acting as the final electron acceptor in cellular respiration.
Daily Temperature Extremes
The highest and lowest temperatures that occur within a single day, indicating the range of thermal variability in an area.
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