Question

there are two stable isotopes of gallium, $^{69}$ga and $^{71}$ga. calculate the average atomic mass from the following data from the mass spectrometer.
isotope % abundance relative mass mass contribution
ga - 69 60.1089 68.925580 amu
ga - 71 39.8929 70.924701 amu
what is the abundance for ga - 69, not the % abundance?
select 3 correct answers
select 3 correct answer(s)
0.601089
60.1089
60.1089/100
0.601089/1

Explanation:

Step1: Convert percentage to fraction

To get the abundance from the percentage abundance, we divide the percentage value by 100. Given the % abundance of Ga - 69 is 60.1089.

Step2: Calculate abundance

The abundance is $\frac{60.1089}{100}=0.601089$. Also, $\frac{0.601089}{1}=0.601089$.

Answer:

A. 0.601089, C. 60.1089/100, D. 0.601089/1