Answer :
The relative atomic mass of Boron in trimethyl borate [(CH3O)3B] is; 10.8
Isotopes and Relative abundance
According to the question;
- Since, ¹¹B is 4 times more abundant than ¹⁰B;
The relative abundance of Boron in the spectrum is;
Relative atomic mass = (80% of 11) + (20% of 10)
- RAM = 8.8 + 2
- RAM = 10.8
Hence, the relative atomic mass of Boron in trimethyl borate [(CH3O)3B] is; 10.8
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