The average atomic mass of carbon is 12.01 amu. One isotope of carbon has an atomic mass of 12.00 amu and the other major isotope of carbon has an atomic mass of 13.00 amu. Calculate the relative abundance of
each isotope.

a. P1 = 0.50 and P2 = 0.50
b. P1 = 0.99 and P2 = 0.01
c. P1 = 0.32 and P2 = 0.68
d. P1 = 0.95 and P2 = 0.05

B

Explanation:

So when you are calculating relative abundance you are actually calculating the atomic mass on the periodic table. So you are given the two isotopes of Carbon C-12 and C-13. Now you know that the atomic mass of C is 12.01 so you have to see that you have a lot more C-12 because the atomic mass is close to 12. Now you can calculate them out like this (0.99 x 12.0) +(.01 x 13.00)=12.01.

answer; talc and gypsum;