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khanhlan7213
13.11.2020 •
History
1. Which was an accomplishment of the Freedmen's Bureau?
They worked to limit the rights of former slaves.
They established public schools in the South.
They helped landowners enforce Black Codes.
They persuaded former slaves to move North.
a
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Ответ:
the answer is B.
Explanation:
I just took the quiz. Hope that helps!
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.