17. 5/4.5 = apx. 3.89
Hope this helps!
Answer:
Hence the expression
Step-by-step explanation:
Explanation
- The given expression is (3rs-7)(3rs-4).
- We have to multiply the given expression.
- Multiply the (3rs-7) by -4, multiply the (3rs-7) by 3rs then add like terms.
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Answer:
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.