In the previous blogpost, we have discussed on the Calculation of Ar based on Isotopic Abundance.
Today, we will look at a more challenging question related to it.
I would love to see you attempting the question and leaving your suggested answer in the comments section below.
Question:
Naturally occurring gallium, Ga, is a mixture of two isotopes of mass numbers 69 and 71. What is the percentage abundance of each isotope? Ar of gallium is given as 69.7.

i’m still doing o-level but i think the answer is 65 percent for isotope of mass 69 n 35 percent for the isotope of mass 71
65% for isotope mass 69 and 35% for isotope of mass 71
Am i correct, sir?