An element has two isotopes of mass numbers 65 and 67 with abundances of 25% and 75% respectively. Then the average atomic mass of the element is

Question

TestHub · Accepted Answer

The average atomic mass of an element is calculated using the formula:

$Average atomic mass = \frac{m _{1} x _{1} + m _{2} x _{2}}{100}$

Substituting the given values:

$Average atomic mass = \frac{65 \times 25 + 67 \times 75}{100}$

$Average atomic mass = \frac{1625 + 5025}{100}$

$Average atomic mass = \frac{6650}{100} = 66.5$

Answer: $66.5$

Chemistry - Mole Concept Question with Solution | TestHub

Options:

Doubts & Discussion