Boron has 2 commonly occurring isotopes. 19.9% of Boron atoms have 55 neutrons and 55protons, whereas the other 80.1% has 66 neutrons and 55 protons. Using the isotopic composition provided, and the known masses of protons ( 1.00727 amu) and neutrons ( 1.00866 amu), calculate the expected mass of Boron. Round your answer to 3 decimal

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