Question

The average atomic mass of carbon is 12.01 amu. One isotope of carbon has an atomic mass of 12.00 amu

Answer 1

Explanation:

please refer to the attached file

Answer 2

Answer:

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.