angelalovelis
20.08.2019 •
Mathematics
What prompted the united states to join the fighting in world war i?
a. the assassination of an archduke
b. an attack on pearl harbor
c. the sinking of american ships in the pacific
d. the sinking of american ships in the atlantic
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Ответ:
Ответ:
Ответ:
10.8109 amu
Step-by-step explanation:
The average atomic mass of boron is determined as the average of the atomic masses of both isotopes weighed by their respective abundances.
Therefore, the average atomic mass is given by:
The average atomic mass of boron isotopes is 10.8109 amu.