Gallium has two naturally occurring isotopes with the following masses and natural abundances: Isotope Mass ( amu ) Abundance (%

Question

Semmy [17]

3 years ago

6

Gallium has two naturally occurring isotopes with the following masses and natural abundances: Isotope Mass ( amu ) Abundance (%

) Ga−69 68.92558 60.108 Ga−71 70.92470 39.892. calculate the atomic mass of gallium

Chemistry

1 answer:

ICE Princess25 [194] · Answer 1 · 2022-04-07T16:08:22+03:00

ICE Princess25 [194]3 years ago

4 0

The formula for determination of atomic mass given the mass of isotopes and relative abundance is:

Ar = ∑(mass * abundance) / 100
Ar = (68.92558 * 60.108 + 70.92470 * 39.892) / 100
Ar = 69.72306

The atomic mass of gallium is 69.72306 amu