Respuesta :
Answer:
Average atomic mass = 10.812 amu
Explanation:
The formula for the calculation of the average atomic mass is:
[tex]Average\ atomic\ mass=(\frac {\%\ of\ the\ first\ isotope}{100}\times {Mass\ of\ the\ first\ isotope})+(\frac {\%\ of\ the\ second\ isotope}{100}\times {Mass\ of\ the\ second\ isotope})[/tex]
Given that:
For first isotope, Boron-10:
% = 19.8 %
Mass = 10.013 amu
For second isotope, Boron-11:
% = 80.2 %
Mass = 11.009 amu
Thus,
[tex]Average\ atomic\ mass=\frac{19.8}{100}\times {10.013}+\frac{80.2}{100}\times {11.009}=1.982574+8.829218=10.811792[/tex]
Average atomic mass = 10.812 amu
Answer:
10.812 to the nearest thousandth,.
Explanation:
That would be 0.198 * 10.013 + 0.802 * 11.009
= 10.812.
