Question

calculate the atomic mass of gallium if gallium has two naturally occurring isotopes with the following massess and natural abundances Ga-69 68.9256 amu 60.11% Ga-71 70.9247 amu 39.89

Answer 1

Answer: Atomic mass of gallium = 69.72304093 amu

Explanation:

We calculate the atomic mass of Gallium  by  using  the Relative abundance of the isotopes.

Atomic mass =mass x Natural Abundance of Isotope 1  +mass x Natural Abundance of Isotope 2

(60.11/100 x  68.9256) + (39.89/100 x  70.9247)

= 41.43117816 + 28.29186283 = 69.72304093 amu