Question

Calculate the average atomic mass of carbon if 98.90% of the atoms are C-12 (12.000000 amu) and 1.100% are C-13 atoms (13.003354 amu).

Answer 1

12.011036894

Step-by-step explanation:

Average atomic mass of carbon =(0.989⋅12)+(0.011⋅13.003354)=12.011036894

Answer 2

12.01 is the correct answer