A sample of boron contains19.7% of boron-10.80.3% of boron-11.Use this information to calculate the relative atomic mas
Question
A sample of boron contains19.7% of boron-10.80.3% of boron-11.Use this information to calculate the relative atomic mas
Solution
To calculate the relative atomic mass of boron using the given information, you need to take into account the relative atomic masses and the abundance of each isotope.
The relative atomic mass (Ar) of an element is calculated using the formula:
Ar = (abundance of isotope 1 x mass of isotope 1) + (abundance of isotope 2 x mass of isotope 2) + ...
Given that the sample contains 19.7% of boron-10 and 80.3% of boron-11, we can substitute these values into the formula.
The atomic mass of boron-10 is 10 and that of boron-11 is 11.
So,
Ar = (0.197 x 10) + (0.803 x 11)
Ar = 1.97 + 8.833
Ar = 10.803
So, the relative atomic mass of boron in this sample is approximately 10.803.
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