Question

The abundance of 12c is 98.9%. 13c is another naturally occurring isotope. what is the percent abundance of 13c?

Answer 1

The percent abundance of carbon-13 (13C) is 1.1%, which is calculated by subtracting the abundance of carbon-12 (12C) from 100%.

Step-by-step explanation:

The percent abundance of carbon-13 (13C) can be calculated by subtracting the abundance of carbon-12 (12C) from 100%. If carbon-12 comprises 98.9% of natural carbon, the calculation would be 100% - 98.9% = 1.1%. Therefore, the percent abundance of carbon-13 is 1.1%.

Answer 2

Actually the total abundance of the isotopes of any element in this world must sum up to 100%. So we initially know that 12 C is 98.9 percent abundant, therefore the remaining of the 100 percent must be of 13 C, that is:

13 C = 100% - 98.9%

13 C = 1.1%