Answer:
Atomic mass of Gallium is 69.7230 amu
Explanation:
100 atoms of gallium contains 60.11 number of [tex]^{69}\textrm{Ga}[/tex] atoms and 39.89 number of [tex]^{71}\textrm{Ga}[/tex] atoms.
Therefore atomic mass of gallium is given by-
[tex]\frac{(60.11\times atomic mass of ^{69}\textrm{Ga})+(39.89\times atomic mass of ^{71}\textrm{Ga})}{100}[/tex]
= [tex]\frac{(60.11\times 68.9256 amu)+(39.89\times 70.9247 amu)}{100}[/tex]
= 69.7230 amu
