Question

Calculate the average atomic mass of caarbon given the following information: Carbon-12 12.000 amu 98.89%

Carbon-12 13.003 amu 1.11%

Answer 1

12.01

Step-by-step explanation:

Given parameters:

Abundance of C-12 = 98.89%

mass of isotope = 12amu

Abundance of C - 12 = 1.11%

mass of isotope = 13.003

Unknown:

Average atomic mass of carbon = ?

Solution:

The average atomic mass ;

R.A.M = (mass of isotope x abundance of isotope)-12 + (mass of isotope x abundance of isotope)- 13

Insert the parameters and solve;

R.A.M =( 12 x 98.89%) + (1.11% x 13.003)

R.A.M = 11.87 + 0.14 = 12.01