Question

The natural isotopic abundance of ^10B is 19.60% an^B is 80.40%. The exact isotopic masses are 10.13 and 11.009 respectively. Calculate the average atomic mass of boron.
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Answer 1

Hello Dear,

◆ Answer -

Average mass = 10.837 amu

◆ Explaination -

Average atomic mass of boron is given as -

Average mass = ∑ (individual mass × abundance)

Average mass = 10.13 × 19.6/100 + 11.009 × 80.4/100

Average mass = 1.985 + 8.852

Average mass = 10.837 amu

Therefore, average atomic mass of boron is 10.837 amu.

Thanks dear. Hope this helps you..